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SFO - OPO

$345 Find cheap flights from San Francisco to Porto

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Porto departing on 7/4. 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
sex 7/12
sex 7/19

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Porto.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Porto.
In the last 7 days travelers have searched 44,148,666 times on KAYAK, and here is why:

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Cheap flight deals from San Francisco to Porto (SFO-OPO)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Porto 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
4:20 pm - 7:00 pmSFO-OPO
18h 40m1 stop
10:55 pm - 1:50 pmOPO-SFO
22h 55m1 stop
$374TAP AIR PORTUGAL
Find Deal
dom, ago 4 - dom, ago 18
4:20 pm - 7:45 amSFO-OPO
31h 25m1 stop
10:55 pm - 1:50 pmOPO-SFO
22h 55m1 stop
$379TAP AIR PORTUGAL
Find Deal
dom, ago 4 - dom, ago 18
2:40 pm - 3:25 pmSFO-OPO
16h 45m1 stop
12:30 pm - 8:05 pmOPO-SFO
15h 35m1 stop
$641United Airlines
Find Deal
dom, nov 10 - ter, nov 19
12:50 pm - 3:25 pmSFO-OPO
18h 35m2 stops
12:30 pm - 8:05 pmOPO-SFO
15h 35m1 stop
$648United Airlines
Find Deal
dom, nov 10 - ter, nov 19
10:45 pm - 10:50 amSFO-OPO
28h 05m2 stops
11:15 am - 11:50 amOPO-SFO
32h 35m1 stop
$653Delta
Find Deal
ter, nov 12 - seg, nov 18
9:00 pm - 10:50 amSFO-OPO
29h 50m2 stops
11:15 am - 4:21 pmOPO-SFO
37h 06m2 stops
$663Delta
Find Deal
ter, nov 12 - seg, nov 18
2:40 pm - 3:25 pmSFO-OPO
16h 45m1 stop
6:00 am - 6:45 pmOPO-SFO
20h 45m2 stops
$670Lufthansa
Find Deal
seg, nov 11 - ter, nov 19
7:25 pm - 11:15 amSFO-OPO
31h 50m1 stop
12:05 pm - 4:25 pmOPO-SFO
36h 20m1 stop
$675SWISS
Find Deal
dom, nov 10 - sáb, nov 16
2:02 pm - 10:25 pmSFO-OPO
25h 23m2 stops
6:05 am - 6:45 pmOPO-SFO
20h 40m1 stop
$700Lufthansa
Find Deal
sex, nov 1 - sex, nov 15
7:25 pm - 6:40 pmSFO-OPO
15h 15m1 stop
12:05 pm - 4:25 pmOPO-SFO
36h 20m1 stop
$712SWISS
Find Deal
qui, nov 7 - sex, nov 15

Flights from San Francisco to Porto - Travel Insights & Trends

Get data-powered insights and trends into flights from San Francisco to Porto to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from San Francisco to Porto?

The average price of all flights from San Francisco to Porto clicked on KAYAK for each day over the last 12 months.
For San Francisco to Porto, Tuesday is the cheapest day to fly on average and Friday is the most expensive. Flying from Porto back to San Francisco, the best deals are generally found on Monday, with Saturday being the most expensive.

What is the cheapest month to fly from San Francisco to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from San Francisco to Porto, 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 from San Francisco to Porto is February, where tickets cost $735 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $1,401 and $1,339 respectively.

How far in advance should I book a flight from San Francisco to Porto?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from San Francisco to Porto, 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 on the flight from San Francisco to Porto, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 28 days before departure.

Which airlines provide the cheapest flights from San Francisco to Porto?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to Porto from San Francisco were found on TAP AIR PORTUGAL ($437) and Air Transat ($511), and the lowest round-trip tickets were found on TAP AIR PORTUGAL ($374) and Scandinavian Airlines ($600).

Good to know

Low season

January

High season

June

Cheapest flight

$345
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 34% increase in price.
Flight from San Francisco to Porto

When to book flights from San Francisco to Porto

Are your dates flexible? Find out the best times to travel from San Francisco to Porto 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. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Francisco to Porto

  • Which other cities can I visit after deplaning from my San Francisco to Porto flight at Francisco Sá Carneiro (OPO)?

    Porto's Francisco Sa Carneiro Airport (OPO) serves as the entry point for the entire region of northern Portugal. If you want to travel to other towns like Braga, renowned for its religious history and architecture, or Coimbra, renowned for having a well-preserved medieval town inside its boundaries, you may fly into OPO.

  • Can I rent a car for my movement flexibility after deplaning from my San Francisco to Porto flight at Francisco Sá Carneiro (OPO)?

    With OPO's Arrivals Hall hosting a number of car rental agencies' counters, you will find it easy to rent a car for your movement flexibility within and outside Porto. Among the car rental agencies with a car rental booth at OPO are SIXT, Budget, Hertz, and Avis.

  • How can I connect to the city after deplaning from my San Francisco to Porto flight at Francisco Sá Carneiro (OPO)?

    After deplaning from your San Francisco to Porto flight at OPO, you will connect to the city center via Metro Line E, a rental car, a bus, or a taxi. However, you should note that a bus travels between the airport and the city center throughout the night. Also, inquire about the toll pass if you're renting a car.

  • Which eco-friendly airline should I consider for my San Francisco to Porto flight?

    One of the eco-friendly airlines you should consider for your flight from San Francisco to Porto is KLM. The airline has made significant efforts to become more eco-friendly. It has implemented sustainable fuel initiatives, reduced emissions through efficient aircraft operations, and invested in carbon offset programs.

  • What is the cheapest flight from San Francisco to Porto?

    In the last 3 days, the lowest price for a flight from San Francisco to Porto was $345 for a one-way ticket and $374 for a round-trip.

  • Do I need a passport to fly between San Francisco and Porto?

    Yes

  • Which airports will I be using when flying from San Francisco to Porto?

    On your way to Porto, you’ll fly out from San Francisco. You’ll be landing at Porto.

  • Which aircraft models fly most regularly from San Francisco to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Francisco to Porto?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between San Francisco and Porto, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Porto from San Francisco?

    Lisbon is the most popular layover city among KAYAK users traveling from San Francisco to Porto.

  • Which is the best airline for flights from San Francisco to Porto, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from San Francisco to Porto are Delta and KLM. With an average price for the route of $875 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $888 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from San Francisco to Porto?

    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 from San Francisco to Porto.

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

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

  • What is the Hacker Fare option on flights from San Francisco to Porto?

    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 Porto with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and OPO can sometimes prove cheaper using this method.

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

    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 Porto from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from San Francisco to Porto

  • When planning your flight from San Francisco to Porto, include at least a single layover. Most airlines servicing this route would make at least one stop before you could land at Francisco Sá Carneiro (OPO). Some of the common layovers on this route include Amsterdam Airport Schiphol (AMS), Adolfo Suárez Madrid-Barajas Airport (MAD), and Dallas/Fort Worth (DFW).
  • If you plan to travel with your pet from San Francisco to Porto, prioritize booking your flight with Delta Airlines. The airline's pet-friendly would allow you to travel with your caged dog or cat in the cabin provided it can fit under the chair. Larger pets would travel as cargo. You should, however, note that your pet will attract some extra charges. You will also need to present a current health certificate issued by a veterinarian.
  • One of the advantages of considering British Airways for your flight from San Francisco to Porto is its ticket upgrading benefits. During your first layover, the airline may send an email requesting to upgrade your ticket and enjoy the first-class amenities at a discounted price.
  • Although all airlines consider Persons with Reduced Mobility (PRMs), you should prioritize booking your flight ticket with Air France. To ensure comfort and enhanced access, the airline offers priority for PRMs, complimentary wheelchair access in SFO and OPO ticket counters, and a team of well-trained staff to care for PRMs' needs.
  • One of the airlines travelers with kids should consider for their flight from San Francisco to Porto is SWISS. To ensure a pleasant journey for your little ones, the airline may offer children's meals, kid-friendly entertainment options, and special toys or coloring books to keep them engaged throughout the flight.
See more tips

Top 5 airlines serving from San Francisco to Porto

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to Porto? 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
DeltaOverall score based on 10000 reviews
7.9Comfort
8.2Boarding
8.6Crew
7.4Food
8.0Entertainment
Airline reviews

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

4.0 OkayBrooke, Jun 2024SFO - MSP
Read more about Delta reviews

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

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

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Honestly, I didn’t expect that I will experience this long time wait during the check in. There was only one person who was taking care of the passengers for the economy class and it took us to wait about one hour to do our check i. As a result we barely get to the airplane as the gate was at the end of the airport. That is totally not professional where one crue is working at the registration desk with economy and 3-4 crues are helping for the business class.

Wonderful experience! The crew was outstanding and amazing from check in to gate to flight crew! Amazing. Thank you!

I arrived 59 minutes before the flight in Tampa due to Massive traffic jam and the flight was closed and I was told that I’d simply have to “book a new ticket on line myself and the gate agents couldn’t help me”. Even though the flight was delayed over 30 minutes, (leaving one hour and 29 minutes before departure, they refused to assist in any way explaining that it’s automatic and there can be no exceptions. Horrible experience due to poor management at gate. I fly this option 2-3 times a year and have a good experience with the cabin crew etc. But, Tampa agents are not trained or allowed customer service. I once was a gate agent for USAir, I know times have changed, but forcing me to purchase a new ticket and complete indifference and inconvenience. No thanks

Good BUT four days later I still don’t have my luggage. It never arrived. !!!!

Crew members were good. Seats were packed and too tight .

Carry on luggage size for economy passengers significantly smaller than other airlines, so nearly all ecomy passengers had their bags taken and checked.

Had a short layover in Zurich, luggage marked expedite and short layover but still didn’t get luggage when arrived in Split until 3 days later even though husband got his.

On time flight, I requested wheelchair in Zurich , when I arrived they were no where to be found, I had one hour between flights I had to walk with great difficulty.

We had issues with upgrading our seats. The flight itself was fine.

Horrible experience. They "GAME" with seats they decided to play where you can`t select or get seat during check-in without paying and then forcing you to stay long line at the Customer Service at the gate to get a boarding ticket with seat assigned is pathetic. Will never fly with United again!

So terrible. They would not rebook me for a flight until 2 days. I had to spend so much money to get my own flight. They were rude and not helpful.

The entertainment wasn’t playing in the app or online.

Why does it have to be painful to fly long distances?

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

Food is very bad and entertint not too many options ... flight attendet service is not good

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

Aisle chair was good and liked the foot bar preventing you from putting your foot in the isle, The breakfast on this international flight to Zurich was horrible (Europeans, specially, used to good food) may make this a dealbreaker for booking with United Airlines again. I agreed with my Spanish fellow passenger.

On time take off…US cabins look tired and need of refresh!

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

Hated every minute of it. This flight should have only taken 1.5hrs but was delayed over 10hours. Now I am being told I cannot be compensated or refunded my ticket price or extra leg room, which I purchased but did not receive, because the airline is throwing the blame on the 3rd party I purchased tickets through and 3rd party putting the blame on airline. No one wants to help. They received their money and that's all they care about. Im going on 3 days of still trying to get to my final destination, had to cancel car rental, car insurance and hotel. Currently staying in airport until hotels open up. Thank you Lufthansa, Kayak, Underpricer and United for making this trip the worst ever.

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

It was disappointing to have to pay for soft drinks/ water. The sandwich I wanted was not available. Servig happened to late in the flight.

Not good. Long lines for checkin. Cramped seats. Would only give one tiny cup of water. Had to use people movers. Won’t fly TAP again

45 min late. Priority is not a priority as they put everyone in the same bus a than priority become last.

The check in process was terrible. Took a long time to check in because there is not enough agents. Once we got to gate, no announcement to board, all of a sudden people got up and board. The seats were EXTREMELY UNCOMFORTABLE. It was a 3 hours international flight, and we were served one tiny cup of water. 😩😩 The temperature was so hot inside rhe plane we thought we were sitting in an oven. Very difficult to find a flight attendant for assistance. They ran up and down aisle to serve first class but never really look up to seve the rest of the flight. I would never fly on this airline again. The experience was horrible.

What didnt i like? You had to pay for seats after the booking was paid for. If i knew that beforehand i would have booked with emirates for a few dollars more

Most important was the effciency - on-time take-offs and landings, no missed connections, baggage arrived correctly. Friendly & professional crew. Less important was food/drink. Pretty spartan, but we'll know next time and bring our own stuff.

Great airline, new, comfortable and quiet planes. Plenty of leg room and state of the art entertainment system. The big downside is the connection in Lisbon. The airport is small and a bus is needed from the plane to the terminal. Is a mess, takes a lot of time, nobody gives an explanation, boarding zones are not honored, etc.

I thought Miami's airport was very disorganized during the Boarding.

Very efficient boarding - other airlines could learn from them. Friendly, efficient crew. Red eye flight, so dinner meal was irrelevant. Breakfast could have been more substantial. Seats reasonably comfy.

People seated in exit rows should have designated overhead space

Poor, we had 1 hour to grab our checked luggage, go through customs, recheck bags and run across terminals to make our United flight. Poorly planned connections.

Staff didn’t care in business class. Closed the door on my mom while she was on the jetbridge and flight attendant told me she would make it from the connecting flight. They lied. My luggage was damaged on arrival. No success in filing damage claim.

Overall, the flight was comfortable without any serious issues. Transit through Frankfurt airport was a little confusing, but not too difficult if you follow the signs

Staff disappeared after dinner service until breakfast, no help with beds, no help running to our gate to catch connection cause flight was late, our luggage didn’t make it, took over 24 hours to get luggage to hotel, no compensation!!

Second time I took this flight, and they lost my luggage both times. Waiting for my suitcase now, last time it took two days to get it back.

Checked in is easy and it was a smooth flight from LAX to Munich

It was a busy flight and all the crew were very helpful and gracious

I wish the flight attendant was a little bit kinder

I always try to book flights that don’t charge for baggage. Yet I was charged $75 for this flight.

Used to love Lufthansa, but Rowe are too close together in Economy and passengers are allowed to recline their seats so far back it is impossible for those behind them to even reach for carry-on essentials during flight - except for meal service when flight attendants ask for seat backs to be raised, we can’t sleep on planes so this flight was most uncomfortable ever! Rod Rose

Book cheap flights from San Francisco to Porto

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from San Francisco to Porto found on KAYAK in the last 72 hours.
7/4qui
3 stops
47h 38mSFO-OPO
$345
7/1seg
3 stops
35h 28mSFO-OPO
$397
8/17sáb
1 stopTAP AIR PORTUGAL
20h 45mSFO-OPO
$437
7/9ter
1 stopTAP AIR PORTUGAL
15h 10mSFO-OPO
$524
9/10ter
1 stopIberia
17h 05mSFO-OPO
$592
6/30dom
1 stopIberia
17h 05mSFO-OPO
$633
8/16sex
2 stopsUnited Airlines
22h 10mSFO-OPO
$703
7/3qua
2 stopsUnited Airlines
22h 10mSFO-OPO
$848
6/28sex
1 stopKLM
21h 00mSFO-OPO
$970
6/28sex
2 stopsKLM
17h 35mSFO-OPO
$975

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Last minute flights from San Francisco to Porto

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 from San Francisco to Porto that are departing in the next 10 days.
6/16dom
multi-stopAir France
19h 55mSFO-OPO
7/9ter
multi-stopAir France
38h 58mOPO-SFO
$1,289
6/15sáb
multi-stopUnited Airlines
22h 15mSFO-OPO
7/9ter
multi-stopUnited Airlines
23h 51mOPO-SFO
$1,504
6/16dom
multi-stopAir France
19h 55mSFO-OPO
7/9ter
multi-stopAir France
33h 40mOPO-SFO
$1,562
6/16dom
multi-stopTAP AIR PORTUGAL
24h 00mSFO-OPO
7/9ter
multi-stopTAP AIR PORTUGAL
28h 35mOPO-SFO
$1,627
6/13qui
multi-stop
27h 08mSFO-OPO
6/16dom
multi-stop
24h 22mOPO-SFO
$3,910
6/13qui
multi-stop
24h 28mSFO-OPO
6/16dom
multi-stop
23h 50mOPO-SFO
$4,762
6/17seg
multi-stopUnited Airlines
21h 45mSFO-OPO
6/29sáb
multi-stopUnited Airlines
18h 24mOPO-SFO
$8,623
6/13qui
multi-stopUnited Airlines
14h 20mSFO-OPO
6/16dom
multi-stopUnited Airlines
14h 40mOPO-SFO
$10,682

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San Francisco - Porto Flights

Departure:

San Francisco (SFO)United States

Destination:

Porto (OPO)Portugal

Return flight deals:

Porto - San Francisco

Cabin classes:

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