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Find cheap flights to Ontario from $36

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 5/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sun 6/9
Sun 6/16

Search hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario
In the last 7 days travelers have searched 43,895,468 times on KAYAK, and here is why:

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Cheap flight deals to Ontario

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
5:15 am - 6:39 amSFO-ONT
1h 24mnonstop
7:39 am - 9:07 amONT-SFO
1h 28mnonstop
$36Frontier
Find Deal
Tue, May 28 - Wed, May 29
5:15 am - 6:39 amSFO-ONT
1h 24mnonstop
8:14 am - 9:42 amONT-SFO
1h 28mnonstop
$38Frontier
Find Deal
Tue, Jun 4 - Wed, Jun 5
8:57 pm - 10:29 pmSFO-ONT
1h 32mnonstop
5:50 am - 7:15 amONT-SFO
1h 25mnonstop
$174United Airlines
Find Deal
Wed, May 29 - Sun, Jun 2
8:15 am - 11:00 amSEA-ONT
2h 45mnonstop
11:43 am - 2:30 pmONT-SEA
2h 47mnonstop
$177Delta
Find Deal
Thu, Jun 27 - Tue, Jul 2
9:26 pm - 11:58 pmSEA-ONT
2h 32mnonstop
8:20 pm - 10:55 pmONT-SEA
2h 35mnonstop
$187Alaska Airlines
Find Deal
Sat, Jun 8 - Sat, Jun 15
7:01 pm - 8:08 pmDFW-ONT
3h 07mnonstop
11:59 pm - 5:00 amONT-DFW
3h 01mnonstop
$189American Airlines
Find Deal
Sat, May 25 - Sat, Jun 1
7:10 am - 12:17 pmSEA-ONT
5h 07m1 stop
1:25 pm - 6:52 pmONT-SEA
5h 27m1 stop
$196Delta
Find Deal
Tue, Jun 11 - Sat, Jun 15
6:30 am - 9:05 amSEA-ONT
2h 35mnonstop
8:20 pm - 10:55 pmONT-SEA
2h 35mnonstop
$202Alaska Airlines
Find Deal
Sat, Jun 29 - Thu, Jul 4
8:55 pm - 10:27 pmSFO-ONT
1h 32mnonstop
6:20 am - 7:45 amONT-SFO
1h 25mnonstop
$214United Airlines
Find Deal
Sat, Jun 1 - Mon, Jun 3
5:45 am - 11:53 amSFO-ONT
6h 08m1 stop
4:40 pm - 10:35 pmONT-SFO
5h 55m1 stop
$217American Airlines
Find Deal
Wed, Aug 28 - Wed, Aug 28

Flights to Ontario - Travel Insights & Trends

Get data-powered insights and trends for flights to Ontario to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to Ontario?

These are the best prices found by users searching on KAYAK in the last 72 hours.
If traveling to Ontario, the cheapest city to fly from in the last 3 days was San Francisco, with flights as low as $37 one-way and $36 round-trip. Flights from Portland are the most searched and start at $58 for a return trip.

How much is a flight to Ontario?

The average and cheapest price for all flights to Ontario from each origin found by users searching on KAYAK in the last month.
On average, a flight to Ontario costs $125. The cheapest price found on KAYAK in the last 2 weeks cost $18 and departed from Phoenix Sky Harbor Intl Airport. The most popular routes on KAYAK are San Francisco to Ontario which costs $127 on average, and Portland to Ontario, which costs $118 on average.
See prices from:

What is the cheapest day to fly to Ontario?

The average price of all flights to Ontario clicked on KAYAK for each day over the last 12 months.
Based on KAYAK data, the cheapest day to fly to Ontario is Friday where tickets can be as cheap as $249. On the other hand, the most expensive day to fly is Sunday, where prices are $323 on average.

What is the cheapest month to fly to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights to Ontario is September, where tickets cost $297 on average for one-way flights. On the other hand, the most expensive months are June and November, where the average cost of tickets from the United States is $515 and $491 respectively. For return trips, the best month to travel is January with an average price of $255.

What is the cheapest time of day to fly to Ontario?

The average price for all flights to Ontario depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to Ontario is generally in the afternoon, when flights cost $298 on average. The most expensive time of day to fly to Ontario is generally in the evening, which is peak travel time and where the average cost of a ticket is $387.

What is a good deal for flights to Ontario?

If you’re looking for cheap airfare to Ontario, 25% of our users found tickets to Ontario for the following prices or less: From Sacramento $35 one-way - $93 round-trip, from Phoenix Sky Harbor Intl Airport $42 one-way - $62 round-trip, from Portland $44 one-way - $68 round-trip.

How far in advance should I book a flight to Ontario?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price, you should book around 0 weeks before departure. For the absolute cheapest price, our data suggests you should book 42 days before departure.

Which airlines fly to Ontario?

Southwest, American Airlines, and Frontier are commonly used to fly to Ontario from United States. See the amount of flights per week for popular airlines flying to Ontario.

Which airline offers the most flights to Ontario?

Of the 8 airlines that fly to Ontario, Southwest offers the most flights, with around 439 per week, followed by American Airlines with 121 flights per week.

How long is the flight to Ontario?

The duration of your flight to Ontario depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular routes to Ontario on KAYAK are from San Francisco, which takes 1h 28m, Miami, which takes 5h 17m, New York, which takes 5h 50m, and Newark, which takes 5h 59m.

How many direct flights to Ontario are there each day?

There are around 135 direct flights from within United States to Ontario every day. Most flights depart in the morning, with 11:00 am the most common departure time and 44% of flights departing in the morning.

How many direct flights to Ontario are there each week?

Each week there are around 942 direct flights from within United States to Ontario. The most common day for departures is Sunday, with 16% of flights taking off on this day.

How many long-haul flights are there to Ontario each week?

Each week, there are 97 medium-haul flights (3-6 hour flight duration) and 639 short-haul flights (up to 3 hour flight duration) to Ontario. There aren't any long-haul flights (6-12 hour flight duration).

How many cities have direct flights to Ontario?

From the United States, there are direct flights to Ontario from 16 cities. The city with the most direct flights is Phoenix Sky Harbor Intl Airport, with 122 direct flights each week.

Good to know

Low season

January

High season

December

Cheapest flight

$36
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from San Francisco to Ontario

When to book flights to Ontario

Are your dates flexible? Find out the best times to travel to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. The information is for flights to Ontario based on your location. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs - booking Ontario flights

  • Can I take a rideshare from the Ontario International Airport (ONT) to my final destination?

    Yes, you can order an app-based rideshare once you land and have claimed your baggage. After baggage claim, follow the signs for “Ride-Share Pickup Location” and these are located near the east end of each passenger terminal.

  • Does the Ontario International Airport (ONT) have services for travelers with limited mobility?

    Yes, ONT offers several services for passengers with reduced mobility. These include wheelchair rental and assistance navigating the airport after landing, as well as services for deaf and visually impaired travelers. Contact your airline in advance if you will need to utilize any of these services.

  • Can I fly directly to the Ontario International Airport (ONT) from any other major US hubs?

    Yes, you will find plenty of direct flights to Ontario from major US cities. For example, United Airlines and Frontier Airlines both operate direct flights from Denver (DEN) to Ontario. You will also find direct flights on board JetBlue from New York City’s JFK airport. Alaska Airlines also offers a direct flight from Seattle to Ontario.

  • What other cities are served by the Ontario International Airport (ONT)?

    The ONT airport mostly serves the city of Ontario, but there are many cities and attractions nearby that it serves, as well. These include Riverside and San Bernardino, as well as the San Bernardino National Forest. It is also quite close to Anaheim, Los Angeles, and Pasadena, California.

  • Are there good restaurants in Ontario International Airport?

    Passengers with flights to Ontario have several options when it comes to where to eat. Look for Schlotzsky’s Deli, El Paseo Cafe and Bar, and Route 66. You will find the restaurants and vending machines in Terminals 2 and 4.

  • Are there good malls or shopping places close to Ontario International Airport?

    Ontario Mills is the largest shopping mall and outlet mall in the Ontario area. Look for a variety of shops at Ontario Mills including Bath & Body Works, North Face, Coach, Polo, and Saks. Or, stop by the movie theater and enjoy a movie in between flights.

  • What kind of services does Ontario International Airport offer?

    At the airport, you can find shopping and dining options, free WiFi for up to 4 hours, cell phone parking lots, an inter-terminal shuttle, and a military lounge. Baggage carts are located for your use throughout the airport.

  • Do hotels in Ontario offer free shuttle service from Ontario International Airport?

    If you are looking for free shuttle service from the airport to a local hotel, you have two choices. Both Azure Hotel and Suites and Red Roof Inn Ontario offer free shuttle service to guests. They are both located approximately 5 minutes from the airport.

  • What is the best way to get from Ontario International Airport to Salt Oasis?

    Salt Oasis is located 6.1 miles from Ontario International Airport. The trip will take approximately 10 minutes by taxi by I-15N. Once you arrive, you can enjoy a salt bath and the salt caves. This is a relaxing way to spend time between flights or a way to de-stress before heading on to your final destination.

  • What is the cheapest flight to Ontario?

    If traveling to Ontario, the cheapest city to fly from in the last 3 days was San Francisco, with flights as low as $37 one-way and $36 round-trip. Flights from Portland are the most searched and start at $58 for a return trip.

  • How far is Ontario from central Ontario?

    Central Ontario is 3 miles away from Ontario.

  • What is the name of Ontario’s airport?

    There is only 1 airport in Ontario, called Ontario (ONT). It can also be referred to as Ontario or Ontario Intl.

  • How much is a flight to Ontario?

    On average, a flight to Ontario costs $125. The cheapest price found on KAYAK in the last 2 weeks cost $18 and departed from Phoenix Sky Harbor Intl Airport.

  • How does KAYAK find such low prices on flights to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Ontario

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Ontario flight deals.
  • If you are picking up a rental car when you land at the Ontario International Airport (ONT), you will need to take the free shuttle bus to the offsite rental car center. You can find the shuttle bus pickup points in front of terminals 2 and 4 at the Terminal Islands.
  • If you are flying into ONT with a pet, you will be happy to find several pet relief areas both inside and outside the terminal buildings. You will find them at terminal 2 gate 210 and terminal 4 gate 410. Otherwise, they are at the far end of each terminal building.
  • If you need to relax after your flight to Ontario, you can take advantage of the Aspire Lounge, which is open to all travelers flying into and departing from the ONT airport. You will find these in terminal 2 at gate 210 and in terminal 4 at gate 410.
  • Landed at the Ontario International Airport (ONT) and not sure where to go next? Visit one of the Travelers Aid desks. The desks are located both in terminal 2 and terminal 4 and are staffed by volunteers committed to helping you get the most out of your trip to Ontario.
  • Have you arrived at the Ontario International Airport (ONT) but your luggage has not? Head to the baggage claim counters in the arrivals area to report the incident to the representatives on duty. They will be able to track your luggage and arrange a delivery to your accommodation address once your luggage arrives in Ontario for your convenience. Just be sure to report it before you leave the airport.
  • Passengers that book flights to Ontario will want to take advantage of the free shuttle provided by the airport. The Ontario Courtesy Shuttle will take passengers between the terminals, parking lot 5, and the Consolidated Rental Car Facility. Shuttle services operate 24 hours a day.
  • Those that are in the military will want to stop by the USO Lounge. Access to the lounge is free to all active military and their families. In the lounge, you can find a TV, snacks, computers, a child care area, and a library. It is open from 6 a.m. to 10 p.m. and can be found in the West Wing for passengers who want somewhere quiet to wait between flights.
  • If you’re picking up or dropping people off at Ontario International Airport, check out the free cell phone lots. You can park there for free while you drop off or wait for your passengers. This area is designed to prevent people from circling the airport endlessly. You can park for free for one hour. No overnight parking allowed.
  • It’s easy to get to and from Ontario International Airport using a variety of transportation options. Look for the car rental services in ConRac which can be reached using the free shuttle service. Or, look for the shuttle, bus, taxi, or train services near the baggage claim area.
  • If you’re looking for business services while you’re at Ontario International Airport, you’ll want to visit the airport hotel located 6 minutes away. The Ontario Airport Holiday Inn offers fully equipped meeting rooms as well as printing, copying, scanning and office supplies.
See more tips

Prefer to fly non-stop to Ontario?

Find which airlines fly direct to Ontario, which days they fly and book direct flights.

Nonstop departures

United States to Ontario

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

See more direct flights

Nonstop returns

Ontario to United States

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

See more direct flights
See more direct flights

Top 5 airlines flying to Ontario

 
See real verified KAYAK customer reviews for airlines flying to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from the United States to Ontario. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9140 reviews
8.2Boarding
8.6Crew
7.9Comfort
7.3Food
7.3Entertainment
Airline reviews

Flight was late but crew was very efficient and friendly.

8.0 ExcellentTeresa, May 2024LIH - SAN
Read more about Alaska Airlines reviews

Flight was late but crew was very efficient and friendly.

Flight cancelled an hour before takeoff due to "unscheduled maintenance". New flight makes me have to wait for 5 hours in the airport, at a gate totally on the other side of where I'm at, requiring me to take a tram to get from the N terminal, to the C terminal. After waiting for 5 hours I'm informed my new flight is no longer at the gate I'm at, but instead is back in the N terminal where I was previously.

No tv, movies for a 6 hour flight! Worst airline I have ever travelled!

It was great; it was on time, everything went smoothly, the crew was excellent. It was just uncomfortable for the usual reasons; completely full fight, could barely move because the space was so small. The expected stuff with every airline.

Ground crew was great in Austin, flight crew left a lot to be desired. Not particularly friendly, helpful or nice.

My baggage was in another flight, anit was delayed for one hour.

They canceled the flight 30 minutes prior to departure without any heads up.

Like South West(2 check in baggage free) if Alaskan Airlines could give at least one check in baggage free then it would be great.

Up on arrival, due to twisted ankle, I wasn’t able to walk. Requested for a wheelchair. They immediately asked for it. After 10 minutes wait a young man named Carlos picked me up at the gate, got my baggage and took me to the pick up area. It was a great service. Thanks Alaska Air line

Staff great. Tight seating. Pretzels and drink same as any other airline.

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Crew was not friendly when I went to request a seat change.

Really impressive staff at airport and on plane, especially given how busy it was

Was a great smooth flight from Detroit to San Diego.

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

The WiFi didn’t work and the seats are too close together. Very uncomfortable.

So so. Terrible aircraft choice for that leg of the flight.

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

On time every leg of the journey and exceptional staff at counter, gate, and on board. I haven’t travelled in US for a long time and was genuinely surprised how pleasant this was.

Fight crew was not very attentive and the bastions were gross!

Our flight was great we left Kona earlier and got into LAX almost an 1hour earlier as well. LAX AA is in repair so to get out and found our bus to get pick up was a bit confusing.

Plane was good but was delayed. probably not AA fault but caused a 1 hour delay. Seating was cramped.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

I can say I will not be taking this airline again any time soon. Seat were uncomfortable and too tight. Lack of chair screen and little overhead space.

Plane felt so crowded and tightly packed. The chair itself was not comfortable.

They attended to my needs as I couldn't walk and they provided a wheelchair for me.q

Poor availability of food. Cold cabin temperature. Extremely long waiting time for a flight attendant to respond to a call button signal.

2.5h delay due to unruly passenger in first class. Had to be removed from the flight. No food unless pre ordered. Didn't know we would need it because of delay.

I checked a bag because it was $5 less than carry on. They managed to lose my bag on a 2.5 hr direct flight! Frontier has no airport staff at baggage claim to help. As soon as I got home around 11 pm I tried to use their online system to file the claim for lost bag - system wouldn't take the # on my baggage claim ticket - said it was not the correct number. Also said that I had not checked a bag, which wasn't true - even my online boarding pass showed that I had checked a bag. Wasted about an hour on that process with no luck. Tried again in the morning - same thing. So tried online chat with Frontier bot - waited 35-40" twice to be connected to a baggage agent and it never happened. Eventually drove to PDX after work and waited 2 hrs for the Frontier ticket agents to arrive prior to the next Frontier flight out of PDX and FINALLY got some help from one of them, to take me to lost luggage area where I was able to retrive my bag. Probably took 4-5 hrs. of my time and endless frustration to get my bag. This was my first -- and LAST -- experience flying Frontier Airlines. Check-in was also extremely difficult and time consuming. The flight itself (and staff) were fine but everything else about the experience was a total disaster! The fact that Frontier literally has NO WAY to connect to a human voice for customer service (in this case for lost luggage) is the WORST!!!!!

Frontier is a crappy airline nothing about it is honest

I didn't get to do this flight l, hard to review

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

Didn't like anything!! Horrible flight. Small seating area and hard seats. Butt was sore after 2 hour flight to Seattle No entertainment or free refreshments No wifi or USB charging receptacles to charge phone entoute like other airliners Luggage rates were 3 times as much as competitors. Difficult to navigate online luggue process to pre pay before flight Overall bad experience WILL NEVER RIDE OR RECOMMEND FRONTIER TO FRIENDS OR FAMILY MEMBERS!!! THIS IS A SHAME!! MOST MESERIBLE FLIGHT OF MY LIFE!! AND I THOUGHT SPIRIT WAS 👎 YOU GOT THEM BEAD HANDS DOWN!!

Flight was a little late taking off. Seats are too upright, no ports to charge devices, no wifi, no entertainment

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

Flight was canceled with little warning. Flight was rebooked through Ontario, California and connecting flight was delayed by over three hours. Frontier is living up to their Greyhound of the skies reputation for sure.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Book Cheap Ontario Plane Tickets

Recent round-trip flight deals

 
These are the cheapest round-trip flights to Ontario found on KAYAK in the last 72 hours.
5/28Tue
nonstopFrontier
1h 24mSFO-ONT
5/29Wed
nonstopFrontier
1h 28mONT-SFO
$36
6/4Tue
nonstopFrontier
1h 24mSFO-ONT
6/5Wed
nonstopFrontier
1h 28mONT-SFO
$38
5/29Wed
nonstopUnited Airlines
1h 32mSFO-ONT
6/2Sun
nonstopUnited Airlines
1h 25mONT-SFO
$174
6/27Thu
nonstopDelta
2h 45mSEA-ONT
7/2Tue
nonstopDelta
2h 47mONT-SEA
$177
6/8Sat
nonstopAlaska Airlines
2h 32mSEA-ONT
6/15Sat
nonstopAlaska Airlines
2h 35mONT-SEA
$187
5/25Sat
nonstopAmerican Airlines
3h 07mDFW-ONT
6/1Sat
nonstopAmerican Airlines
3h 01mONT-DFW
$189
6/11Tue
1 stopDelta
5h 07mSEA-ONT
6/15Sat
1 stopDelta
5h 27mONT-SEA
$196
6/29Sat
nonstopAlaska Airlines
2h 35mSEA-ONT
7/4Thu
nonstopAlaska Airlines
2h 35mONT-SEA
$202
6/1Sat
nonstopUnited Airlines
1h 32mSFO-ONT
6/3Mon
nonstopUnited Airlines
1h 25mONT-SFO
$214
8/28Wed
1 stopAmerican Airlines
6h 08mSFO-ONT
8/28Wed
1 stopAmerican Airlines
5h 55mONT-SFO
$217

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to Ontario found on KAYAK in the last 72 hours.
6/12Wed
nonstopFrontier
2h 44mSEA-ONT
$37
7/9Tue
nonstopFrontier
3h 02mDFW-ONT
$37
6/5Wed
nonstopAlaska Airlines
2h 33mSEA-ONT
$89
5/30Thu
nonstopAmerican Airlines
3h 07mDFW-ONT
$95
6/4Tue
1 stopAmerican Airlines
4h 45mSEA-ONT
$98
6/12Wed
1 stopDelta
6h 06mDEN-ONT
$98
6/5Wed
1 stopAlaska Airlines
8h 01mDFW-ONT
$104
6/5Wed
1 stopDelta
5h 53mDFW-ONT
$108
8/7Wed
1 stopUnited Airlines
4h 59mSEA-ONT
$110
8/28Wed
1 stopUnited Airlines
9h 59mEWR-ONT
$113

Search by stops

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Search by price

Last minute flights to Ontario

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights to Ontario that are departing in the next 10 days.
5/13Mon
nonstopFrontier
1h 29mSFO-ONT
5/16Thu
nonstopFrontier
1h 28mONT-SFO
$89
5/15Wed
nonstopFrontier
1h 29mSFO-ONT
5/19Sun
nonstopFrontier
1h 28mONT-SFO
$94
5/14Tue
multi-stopAmerican Airlines
6h 45mDFW-ONT
5/26Sun
nonstopAmerican Airlines
3h 00mONT-DFW
$284
5/11Sat
multi-stopAmerican Airlines
10h 32mJFK-ONT
5/11Sat
multi-stopAmerican Airlines
10h 30mONT-JFK
$285
5/14Tue
multi-stopDelta
10h 18mJFK-ONT
5/20Mon
multi-stopDelta
8h 23mONT-JFK
$286
5/14Tue
multi-stopUnited Airlines
5h 32mDFW-ONT
5/26Sun
multi-stopUnited Airlines
5h 25mONT-DFW
$293
5/14Tue
multi-stopDelta
5h 53mDFW-ONT
5/26Sun
multi-stopDelta
5h 54mONT-DFW
$297
5/13Mon
nonstopUnited Airlines
1h 34mSFO-ONT
5/18Sat
nonstopUnited Airlines
1h 28mONT-SFO
$324
5/12Sun
multi-stopAlaska Airlines
9h 00mORD-ONT
5/13Mon
multi-stopAlaska Airlines
7h 46mONT-ORD
$367
5/11Sat
multi-stopAlaska Airlines
4h 38mSEA-ONT
6/1Sat
nonstopAlaska Airlines
2h 39mONT-SEA
$391

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - United States

Cabin classes:

$341
$478
$193
$29

Browse origins:

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