Find flights
Deals
Insights
When to book
FAQs & Tips

$293 Find cheap flights from Washington Dulles Airport to Belfast

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Belfast departing on 7/14. 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 Belfast

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Belfast, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Belfast, as well as popular online travel agencies
In the last 7 days travelers have searched 44,148,666 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Dulles Intl to Belfast (IAD-BHD)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Belfast 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
11:00 pm - 4:40 pmIAD-BHD
13h 40m1 stop
9:00 am - 3:45 pmBHD-IAD
11h 45m1 stop
$544British Airways
Find Deal
ter, out 29 - qui, nov 7
10:45 pm - 3:20 pmIAD-BHD
11h 35m1 stop
10:10 am - 8:30 pmBHD-IAD
15h 20m1 stop
$564British Airways
Find Deal
ter, set 17 - sex, set 27
11:00 pm - 2:25 pmIAD-BHD
11h 25m1 stop
7:30 pm - 3:58 pmBHD-IAD
25h 28m2 stops
$573British Airways
Find Deal
ter, out 29 - qui, nov 7
5:51 pm - 2:25 pmIAD-BHD
16h 34m2 stops
6:45 am - 10:19 pmBHD-IAD
20h 34m2 stops
$589American Airlines
Find Deal
ter, out 29 - qui, nov 7
5:25 pm - 4:50 pmIAD-BHD
18h 25m1 stop
5:20 pm - 3:35 pmBHD-IAD
27h 15m1 stop
$686Delta
Find Deal
dom, ago 11 - dom, ago 18
6:26 pm - 4:50 pmIAD-BHD
17h 24m2 stops
5:20 pm - 3:35 pmBHD-IAD
27h 15m1 stop
$690Delta
Find Deal
dom, ago 11 - dom, ago 18
7:05 pm - 5:55 pmIAD-BFS
18h 50m2 stops
9:00 pm - 4:55 pmBFS-IAD
24h 55m2 stops
$712
Find Deal
ter, out 29 - qui, nov 7
6:50 pm - 8:05 pmIAD-BHD
20h 15m2 stops
7:15 am - 5:40 pmBHD-IAD
39h 25m3 stops
$769
Find Deal
ter, set 17 - sáb, set 21
6:26 pm - 4:50 pmIAD-BHD
17h 24m2 stops
5:20 pm - 3:57 pmBHD-IAD
27h 37m2 stops
$804KLM
Find Deal
dom, ago 11 - dom, ago 18
5:55 pm - 12:50 pmIAD-BHD
13h 55m1 stop
6:35 am - 8:30 pmBHD-IAD
18h 55m1 stop
$1,783American Airlines
Find Deal
seg, jul 8 - qui, jul 11

Flights from Dulles Intl to Belfast - Travel Insights & Trends

Get data-powered insights and trends into flights from Dulles Intl to Belfast to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Belfast?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Washington, D.C. Dulles Intl Airport to Belfast, 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 Washington, D.C. Dulles Intl Airport to Belfast is September, where tickets cost $683 on average. On the other hand, the most expensive months are December and June, where the average cost of tickets is $1,183 and $977 respectively.

Which airlines provide the cheapest flights from Washington Dulles Airport to Belfast?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the best return deals on flights connecting Washington Dulles Airport to Belfast were found on British Airways ($544) and American Airlines ($589). Delta proposed the cheapest one-way flight at $429.

Good to know

Cheapest flight

$293
Flight from Washington Dulles Airport to Belfast Intl Airport

When to book flights from Dulles Intl to Belfast

Are your dates flexible? Find out the best times to travel from Dulles Intl to Belfast 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 Washington Dulles Airport to Belfast flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Belfast?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Belfast was $293 for a one-way ticket and $544 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Belfast?

    Yes, you’ll need a passport to travel to Belfast from Washington Dulles Airport.

  • Which airports will I be using when flying from Washington Dulles Airport to Belfast?

    Washington Dulles Airport is served by only 1 airport and there are 2 airports in Belfast. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and you will be arriving in Belfast at one of these airports: Belfast Intl or Belfast City.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Belfast?

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

  • Which airline alliances offer flights from Washington Dulles Airport to Belfast?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Washington Dulles Airport and Belfast, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Belfast?

    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 Washington Dulles Airport to Belfast.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Belfast?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Washington Dulles Airport 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 Washington Dulles Airport to Belfast?

    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 Belfast with an airline and back to Washington Dulles Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Belfast?

    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 Belfast from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from Washington, D.C. to Belfast

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Belfast found on KAYAK in the last 72 hours.
7/14dom
2 stops
33h 10mIAD-BFS
$293
7/15seg
2 stops
31h 30mIAD-BFS
$302
9/7sáb
2 stops
28h 55mIAD-BFS
$325
7/10qua
2 stops
16h 20mIAD-BFS
$354
7/11qui
2 stops
22h 30mIAD-BFS
$365
7/15seg
3 stops
23h 35mIAD-BFS
$368
9/7sáb
2 stops
28h 50mIAD-BHD
$370
7/5sex
1 stopDelta
18h 25mIAD-BHD
$429
7/5sex
2 stopsDelta
22h 42mIAD-BHD
$434
7/2ter
2 stopsAmerican Airlines
16h 37mIAD-BHD
$570

Search by stops

Search by airline

Search by price

Washington Dulles Airport - Belfast Flights

Departure:

Washington Dulles Airport (IAD)United States

Cabin classes:

Browse origins:

Browse destinations: