$366 Find Cheap Flights from Washington, D.C. 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 Washington, D.C. to Belfast departing on 9/22. 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

KAYAK searches 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
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Everything you should know

Cheapest round-trip
$810
Multiple Airlines
Wed 5/27Wed 6/3
IAD - BFS • 2 stops
Cheapest one-way
$366
British Airways
Tue 9/22
IAD - BHD • 1 stop
Top airlines
Cheapest • from $957 (round-trip)
Best reviews • 6.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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

Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
9:55 am - 3:55 pm
IAD
-
BFS
25h 00m
2 stops
Multiple Airlines Logo
8:30 am - 3:10 pm
BFS
-
IAD
35h 40m
3 stops
$810Multiple Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
6:00 am - 3:55 pm
DCA
-
BFS
28h 55m
3 stops
Multiple Airlines Logo
6:15 am - 9:55 pm
BFS
-
DCA
20h 40m
2 stops
$835Multiple Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
9:55 am - 5:05 pm
IAD
-
BFS
26h 10m
2 stops
Multiple Airlines Logo
6:15 am - 6:58 pm
BFS
-
IAD
17h 43m
2 stops
$850Multiple Airlines
Sat, Sep 5 - Sat, Sep 12
Multiple Airlines Logo
8:30 pm - 8:40 pm
IAD
-
BFS
19h 10m
2 stops
Multiple Airlines Logo
9:05 pm - 3:10 pm
BFS
-
IAD
47h 05m
3 stops
$875Multiple Airlines
Sat, Sep 12 - Wed, Sep 16
Multiple Airlines Logo
8:30 pm - 8:40 pm
IAD
-
BFS
19h 10m
2 stops
Multiple Airlines Logo
8:15 pm - 2:25 pm
BFS
-
IAD
47h 10m
3 stops
$895Multiple Airlines
Tue, Sep 22 - Wed, Sep 30
British Airways Logo
5:45 pm - 10:45 am
IAD
-
BHD
12h 00m
1 stop
British Airways Logo
6:30 am - 8:20 pm
BHD
-
IAD
18h 50m
1 stop
$957British Airways
Mon, Sep 7 - Fri, Sep 11
British Airways Logo
7:15 pm - 12:55 pm
IAD
-
BHD
12h 40m
1 stop
British Airways Logo
6:30 am - 5:25 pm
BHD
-
IAD
15h 55m
1 stop
$979British Airways
Tue, Sep 22 - Wed, Sep 30
American Airlines Logo
8:15 pm - 3:20 pm
IAD
-
BHD
14h 05m
2 stops
American Airlines Logo
11:35 am - 11:51 pm
BHD
-
IAD
17h 16m
2 stops
$992American Airlines
Sat, Sep 12 - Wed, Sep 16
KLM Logo
12:30 pm - 9:15 am
IAD
-
BHD
15h 45m
2 stops
KLM Logo
9:50 am - 3:35 pm
BHD
-
IAD
10h 45m
1 stop
$1,053KLM
Wed, May 27 - Wed, Jun 3
American Airlines Logo
9:30 pm - 1:35 pm
BWI
-
BHD
11h 05m
1 stop
American Airlines Logo
6:30 am - 7:40 pm
BHD
-
BWI
18h 10m
1 stop
$1,183American 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 72 hours.

In the past 3 days, the cheapest round-trip tickets from Washington, D.C. to Belfast were found on British Airways ($957) and American Airlines ($992).

Good to know

Cheapest flight$366
Flight from Washington Dulles Airport to Belfast City 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 3 days, the lowest price for a flight from Washington, D.C. to Belfast was $448 for a one-way ticket and $810 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.

  • Which airline alliances offer flights from Washington, D.C. to Belfast?

    oneworld is the only airline alliance operating flights between Washington, D.C. and Belfast.

  • 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 7937 reviews
6.4Food
6.4Entertainment
7.7Crew
6.9Boarding
6.8Comfort
Airline reviews

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

10.0 ExcellentAnonymous, Apr 2026
SFO - LHR
Read more British Airways reviews

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

The whole experience was excellent, O can say out from Miami the best airline to travel with for any European destination. Since the ground staff to the inflight crew attention was great, service on board 10 of 10. Finally the 380 is very confortable and nice to travel.

All crew except 1 were excellent. When I asked assistance with business class seat conversion to a bed (not being familiar as never used before but have numerous times with other airlines) crew member helped very reluctantly. I should have told her that business class seat conversion is totally different in each airline such as Delta, New Zealand Air and United. Sorry it was my 1st time with America Airlines. Now I know, I won't bother asking assistance in future.

The seats in Premier Economy were very comfortable. The food was better than average. The way British Airways handled our seating was atrocious.

Flight delayed, connection was not at gate listed and so missed, staff were rude at Heathrow, phone tree stupid and difficult, took me 21 actual hours to reach my destination. Almost lost my hotel reservation after walking in a strange city alone after midnight because they would not put me up in a hotel at sfo or heathrow. I will never fly BA again and will tell all people and Instagram followers never to fly BA.

Overall ok. Best part has always been the sundae dessert.

I’ve never been on a trans-Atlantic (or Pacific) flight where the seats don’t recline—not even a little. I asked my seat mate when BA starting doing this and he said “Oh, a few years ago.” I couldn’t sleep, with my head falling forward waking me continuously, and came off the plane incredibly stiff. I booked a Premium Economy seat to get a more comfortable seat, which was worse than most basic Economy seats I’ve ever booked.

Nice aircraft. Good crew. Delayed departure from Houston, but arrived on time in London. Main thing I don’t like about flying BA is having to transit through security in London Heathrow. A major pain!

The gate agent made me check my carry-on in Denver, even though I've traveled all over taking this case on the plane. Beware folks. Food in Premium Economy was quite good - excellent blanket! Flight attendants on the Heathrow-to-Budapest flight on 3-27-2026 were quite snappy. I got a frown when asked to unscrew the water bottle cap for me (I had a cast on my right arm). Also woke up right when they were handing out biscuits. She had given my rowmates one and was in the process of giving water when I asked for a biscuit. She scolded me and said, "You snooze, you lose". She did give me one, but I thought that comment was uncalled for.

Wish the food and overall service was better. They treat Business class passengers same as economy

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.