$241 Find Cheap Flights from Washington, D.C. to Belfast - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Belfast departing on 9/2. 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
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$743
Multiple Airlines
Sat 10/17Sat 11/7
IAD - BFS • 2 stops
Cheapest one-way
$241
Multiple Airlines
Wed 9/2
IAD - BFS • 3 stops
Top airlines
Cheapest • from $941 (round-trip)
Best reviews • 6.7 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Flight Deals

Cheap Flights from Washington, D.C. to Belfast (WAS-BHD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Belfast

Sat, Oct 17 - Sat, Nov 7
Multiple Airlines Logo
8:30 pm - 11:25 pm
IAD
-
BFS
21h 55m
2 stops
Multiple Airlines Logo
3:25 pm - 8:35 pm
BFS
-
IAD
34h 10m
3 stops
$743Multiple Airlines
Sat, Oct 17 - Sat, Nov 7
Multiple Airlines Logo
8:30 pm - 11:25 pm
IAD
-
BFS
21h 55m
3 stops
Multiple Airlines Logo
3:25 pm - 8:35 pm
BFS
-
IAD
34h 10m
3 stops
$747Multiple Airlines
Mon, Sep 14 - Mon, Sep 21
Multiple Airlines Logo
8:30 pm - 4:15 pm
IAD
-
BFS
14h 45m
2 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$783Multiple Airlines
Mon, Sep 14 - Mon, Sep 28
Multiple Airlines Logo
8:30 pm - 8:40 pm
IAD
-
BFS
19h 10m
2 stops
Multiple Airlines Logo
9:25 pm - 2:15 pm
BFS
-
IAD
45h 50m
3 stops
$788Multiple Airlines
Sat, Sep 12 - Wed, Sep 23
Multiple Airlines Logo
11:20 pm - 10:40 pm
IAD
-
BFS
18h 20m
2 stops
Multiple Airlines Logo
4:10 pm - 3:10 pm
BFS
-
IAD
28h 00m
3 stops
$791Multiple Airlines
Mon, Nov 16 - Tue, Nov 24
Multiple Airlines Logo
7:40 pm - 7:10 pm
IAD
-
BFS
18h 30m
2 stops
Multiple Airlines Logo
8:25 am - 8:35 pm
BFS
-
IAD
41h 10m
3 stops
$792Multiple Airlines
Mon, Nov 16 - Tue, Nov 24
Multiple Airlines Logo
7:40 pm - 8:10 pm
IAD
-
BFS
19h 30m
3 stops
Multiple Airlines Logo
8:25 am - 8:35 pm
BFS
-
IAD
41h 10m
3 stops
$793Multiple Airlines
Sat, Sep 12 - Wed, Sep 23
Multiple Airlines Logo
8:30 pm - 10:40 pm
IAD
-
BFS
21h 10m
2 stops
Multiple Airlines Logo
8:30 am - 3:10 pm
BFS
-
IAD
35h 40m
3 stops
$797Multiple Airlines
Sun, Sep 20 - Mon, Oct 5
Multiple Airlines Logo
8:30 pm - 9:50 pm
IAD
-
BFS
20h 20m
2 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$800Multiple Airlines
Sat, Sep 12 - Wed, Sep 23
Multiple Airlines Logo
8:30 pm - 10:40 pm
IAD
-
BFS
21h 10m
2 stops
Multiple Airlines Logo
8:30 am - 2:15 pm
BFS
-
IAD
34h 45m
3 stops
$805Multiple Airlines
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Belfast flights

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

Which airlines provide the cheapest flights from Washington, D.C. to Belfast?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Washington, D.C. to Belfast were found on British Airways ($941) and Virgin Atlantic ($983).

Good to know

Cheapest flight

$241
Flight from Washington Dulles Airport to Belfast Intl Airport

When to book flights from Washington, D.C. to Belfast

Are your dates flexible? Find out the best times to travel from Washington, D.C. 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 flights from Washington, D.C. to Belfast

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

    In the last 5 days, the lowest price for a flight from Washington, D.C. to Belfast was $241 for a one-way ticket and $743 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Belfast?

    Yes, you’ll need a passport to travel to Belfast from Washington, D.C..

  • Which airports will I be using when flying from Washington, D.C. to Belfast?

    Washington, D.C. is served by 2 major airports and there are 2 airports in Belfast. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving in Belfast at one of these airports: Belfast Intl or Belfast City.

  • Which aircraft models fly most regularly from Washington, D.C. to Belfast?

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

  • How does KAYAK find such low prices on flights from Washington, D.C. 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, D.C. to Belfast.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Washington, D.C. 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, D.C. 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, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. 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, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Washington, D.C. to Belfast

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Belfast. 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 Washington, D.C. to Belfast? 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.
6.7
British AirwaysOverall score based on 8136 reviews
7.0Boarding
6.8Comfort
7.7Crew
6.5Entertainment
6.4Food
Airline reviews

Horrible… I was downgraded without notice, had to sit in economy and given my back injury was in pain most of the journey. I expect to be reimbursed for this inconvenience and after my return flight home, I never plan to fly with British Airways again.

2.0 MediocreOlga, Sep 2025
IAD - LHR
Read more British Airways reviews

Horrible… I was downgraded without notice, had to sit in economy and given my back injury was in pain most of the journey. I expect to be reimbursed for this inconvenience and after my return flight home, I never plan to fly with British Airways again.

I like the crew, very welcoming. Food can be better. The seat arms don’t go up so. I could use the empty seat next to mine to relax better. 3hrs delay 😠

The flight was very delayed in taking off - which was out of control of the crew, but then the pilot worked hard so we only arrived about 30 minutes late. Everyone was very friendly and accommodating!

I enjoyed the comfort of Premium Economy. The Purser on London-Nairobi was a little testy, snappish in his tone. I understand stressed, tired, etc but his tone in addressing passengers I found wanting.

The flight was delayed twice and because of that, we missed our connecting flight. British Airways then attempted to put us on the last flight to Milan from London which would have kept us in the airport for 12 hours. We had to speak to several levels of bureaucracy until BA management let us fly on a flight that only kept us in the airport for two hours. If there was an earlier flight, why weren’t we put on that flight from the start? Unacceptable behavior from what was once my favorite carrier.

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

Nice flight, attentive crew, soft landing by the Pilot,, comfortable seat.

Service was very good. Because I use a cane, I was allowed to use Priority Boarding. Biggest problem was extremely limited leg room in Economy class seats. For airplane food, it was alright.

Great job notifying of 30 minute delay in departure. Fabulous job making up for the time and arriving as scheduled. Air travel is just no fun anymore with the extreme overcrowding, and someone needs to come up with an innovative plan for loading and unloading passengers (load all window seats first, middle seats second, aisle seats last?). Great job getting the luggage on the carousel in record time!

Flight was canceled with little notice or explanation. There were no other flights to Belfast from Heathrow, so I had to travel across town to London City (or wait until the next day).

Everything you need to know for your flight from Washington, D.C. to Belfast

Cabin class types available on flights from Washington, D.C. to Belfast

Cabin classes available on flights from Washington, D.C. to Belfast. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.