$249 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 3/10. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

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

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

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

Everything you should know

Cheapest round-trip
$598
Multiple Airlines
Wed 2/25Wed 3/4
IAD - BHD • 2 stops
Cheapest one-way
$249
Multiple Airlines
Tue 3/10
IAD - BFS • 3 stops
Top airlines
British Airways
Cheapest • from $644 (round-trip)
British Airways
Best reviews • 6.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Belfast!
Flight Deals
Booking Insights
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, Feb 25 - Wed, Mar 4
Multiple Airlines Logo
7:40 pm - 7:00 pm
IAD
-
BHD
18h 20m
2 stops
Multiple Airlines Logo
7:25 am - 6:30 pm
BHD
-
IAD
16h 05m
2 stops
$598Multiple Airlines
Wed, Feb 25 - Wed, Mar 4
British Airways Logo
6:20 pm - 9:10 am
IAD
-
BHD
9h 50m
1 stop
British Airways Logo
12:25 pm - 7:55 pm
BHD
-
IAD
12h 30m
1 stop
$644British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
6:20 pm - 9:10 am
IAD
-
BHD
9h 50m
1 stop
British Airways Logo
12:10 pm - 4:35 pm
BHD
-
IAD
32h 25m
1 stop
$647British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
6:20 pm - 9:10 am
IAD
-
BHD
9h 50m
1 stop
British Airways Logo
8:25 pm - 4:35 pm
BHD
-
IAD
24h 10m
1 stop
$650British Airways
Thu, Mar 5 - Thu, Mar 12
British Airways Logo
9:45 pm - 6:50 pm
IAD
-
BHD
16h 05m
1 stop
British Airways Logo
10:40 am - 8:55 pm
BHD
-
IAD
14h 15m
1 stop
$653British Airways
Sat, May 2 - Sat, May 9
British Airways Logo
5:40 pm - 10:05 am
IAD
-
BHD
11h 25m
1 stop
British Airways Logo
7:05 am - 5:25 pm
BHD
-
IAD
15h 20m
1 stop
$660British Airways
Fri, May 1 - Tue, May 5
British Airways Logo
10:25 pm - 6:10 pm
IAD
-
BHD
14h 45m
1 stop
British Airways Logo
6:20 pm - 5:25 pm
BHD
-
IAD
28h 05m
1 stop
$664British Airways
Fri, May 1 - Tue, May 5
British Airways Logo
9:30 pm - 3:30 pm
BWI
-
BHD
13h 00m
1 stop
British Airways Logo
12:40 pm - 7:40 pm
BHD
-
BWI
12h 00m
1 stop
$664British Airways
Wed, Feb 25 - Wed, Mar 4
Delta Logo
12:24 pm - 4:50 pm
IAD
-
BHD
23h 26m
2 stops
Delta Logo
6:30 am - 4:05 pm
BHD
-
IAD
14h 35m
1 stop
$676Delta
Thu, May 14 - Sun, May 17
Multiple Airlines Logo
8:30 pm - 7:30 pm
IAD
-
BFS
18h 00m
2 stops
Multiple Airlines Logo
9:55 am - 10:15 pm
BFS
-
IAD
17h 20m
2 stops
$777Multiple 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 ($644) and Delta ($676).

Find deals

Good to know

Cheapest flight$249
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 3 days, the lowest price for a flight from Washington, D.C. to Belfast was $249 for a one-way ticket and $598 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 7705 reviews
6.4Food
6.9Boarding
7.6Crew
6.8Comfort
6.4Entertainment
Airline reviews

The issue was not with BA it was with the link yoiu sent fopr booking the flight

2.0 MediocreAnonymous, Jan 2026
LAX - LHR
Read more British Airways reviews

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Awful it always is unfortunately is the only way to fly direct to london

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Boarding was poor. All groups called immediately one after the other resulting in a long queue in the jetty/jet bridge. Seats were very hard and and did not recline on a 4.5 hour flight. No food was available. Plane was cold. There was no entertainment.

The cramped seats are cruel and unusual punishment and may violate the Geneva code.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

The flight was excellent in World Travellor plus. Well worth the extra money. Boarding at Phoenix was the usual poorly organized event. Very stressful.

Although business class, the seating was really cramped. The food was so so.

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.
First Class flights from Washington, D.C. to Belfast
Business Class flights from Washington, D.C. to Belfast
Premium Economy Class flights from Washington, D.C. to Belfast
Economy Class flights from Washington, D.C. to Belfast