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Cheap flights from Washington, D.C. to Belfast from £222

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
13 Mar — 20 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington, D.C. to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from Washington, D.C. to Belfast
Explore the most affordable flight options available from Washington, D.C. to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 February 2026.

Sun 8/322:45
IAD
-
BHD
1 stop11h 10m
British Airways
Sun 15/320:25
BHD
-
IAD
1 stop28h 30m
British Airways
Deal found 7/2£473
Wed 4/318:20
IAD
-
BHD
1 stop9h 50m
British Airways
Sun 8/312:10
BHD
-
IAD
1 stop32h 25m
British Airways
Deal found 8/2£475
Mon 2/318:20
IAD
-
BHD
1 stop11h 20m
American Airlines
Tue 17/308:45
BHD
-
IAD
1 stop11h 50m
American Airlines
Deal found 11/2£476
Thu 5/321:45
IAD
-
BHD
1 stop29h 40m
British Airways
Thu 12/306:35
BHD
-
IAD
1 stop14h 00m
British Airways
Deal found 9/2£479
Mon 2/316:34
DCA
-
BHD
2 stops13h 06m
American Airlines
Tue 17/308:45
BHD
-
DCA
2 stops13h 48m
American Airlines
Deal found 11/2£479
Tue 25/817:40
IAD
-
BHD
1 stop10h 20m
British Airways
Mon 31/809:40
BHD
-
IAD
1 stop11h 10m
British Airways
Deal found 9/2£481
Tue 25/817:40
IAD
-
BHD
1 stop10h 20m
British Airways
Tue 1/913:45
BHD
-
IAD
1 stop11h 35m
British Airways
Deal found 10/2£482
Sun 15/218:04
BWI
-
BHD
2 stops19h 36m
American Airlines
Mon 23/211:30
BHD
-
BWI
2 stops15h 56m
American Airlines
Deal found 9/2£484
Wed 4/313:54
DCA
-
BHD
2 stops15h 21m
American Airlines
Sun 8/306:30
BHD
-
DCA
2 stops15h 12m
American Airlines
Deal found 9/2£484
Thu 20/817:40
IAD
-
BHD
1 stop11h 30m
British Airways
Thu 10/909:35
BHD
-
IAD
1 stop15h 45m
British Airways
Deal found 9/2£484
Sun 15/218:05
IAD
-
BHD
1 stop17h 45m
Multiple Airlines
Mon 23/206:30
BHD
-
IAD
1 stop14h 35m
Multiple Airlines
Deal found 9/2£490
Mon 2/319:35
IAD
-
BHD
2 stops16h 10m
KLM
Tue 17/306:30
BHD
-
IAD
1 stop14h 35m
KLM
Deal found 11/2£492

Find flight deals from Washington, D.C. to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Belfast (BF1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 11 February 2026.

Round-trip from

£473

One-way from

£222
British Airways
  • British Airways
  • 8/3-15/3
  • 2 total stops
  • 39h 40m total
  • Washington, D.C. to Belfast
Search Deals
4/3
  • 4/3
  • 3 total stops
  • 47h 05m total
  • Washington, D.C. to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington, D.C. to Belfast that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 11 February 2026.
Use the filters below to find and compare flights from Washington, D.C. to Belfast that are best for you.

Fly from

Washington, D.C.

Fly to

Belfast

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 4/3

18:20-09:10

1 stop9h 50m

Belfast City

Sun 8/3

12:10-16:35

1 stop32h 25m

£475

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 2/3

18:20-10:40

1 stop11h 20m

Belfast City

Tue 17/3

08:45-16:35

1 stop11h 50m

£476

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Mon 2/3

16:34-10:40

2 stops13h 06m

Belfast City

Tue 17/3

08:45-18:33

2 stops13h 48m

£479

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 5/3

21:45-08:25

1 stop29h 40m

Belfast City

Thu 12/3

06:35-20:55

1 stop18h 20m

£480

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sat 9/5

17:40-12:25

1 stop13h 45m

Belfast City

Thu 21/5

06:30-15:50

1 stop14h 20m

£481

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Wed 4/3

13:54-10:15

2 stops15h 21m

Belfast City

Sun 8/3

06:30-16:42

2 stops15h 12m

£484

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 4/3

18:05-16:50

1 stop17h 45m

Belfast City

Sun 8/3

06:30-16:05

1 stop14h 35m

£490

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 4/3

12:24-16:50

2 stops23h 26m

Belfast City

Sun 8/3

06:30-16:05

1 stop14h 35m

£493

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Mon 2/3

19:26-16:45

2 stops16h 19m

Belfast City

Tue 17/3

06:30-18:09

2 stops15h 39m

£497

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 5/3

18:05-16:50

1 stop17h 45m

Belfast City

Thu 12/3

06:30-20:46

2 stops18h 16m

£498

Flights are sorted by cheapest return flights first.

Deals found on 8/2

Showing 1-10 of 47 results
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Best time to book a flight from Washington, D.C. to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Washington, D.C. with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Belfast
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Belfast. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. to Belfast?

    British Airways, American Airlines, and KLM can get you from Washington, D.C. to Belfast in just under 9h 50m. Your travel time can differ by up to 6h 29m. Airlines will cover a distance of 3390 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from Washington, D.C. to Belfast?

    The most popular flight routes from Washington, D.C. to Belfast are Washington, D.C. Dulles Intl - Belfast Intl, Washington, D.C. Dulles Intl - Belfast City and Baltimore/Washington - Belfast Intl.

  • Can I find deals for flights from Washington, D.C. to Belfast that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Belfast.

  • Can I find deals for business class flights from Washington, D.C. to Belfast?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Belfast by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

Complete your trip to Belfast by adding a car hire and/or hotel booking to your travel itinerary.
Belfast car hire
Belfast Intl Airport car hire
Londonderry Eglinton Airport car hire
Isle of Islay Glenegedale Airport car hire
Londonderry car hire

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Washington, D.C. to Belfast?

Cheapflights makes it easy to find Washington, D.C. to Belfast flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Belfast?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Belfast from Washington, D.C..

Can Cheapflights find flights from Washington, D.C. to Belfast with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Washington, D.C. to Belfast, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Washington, D.C. to Belfast become cheaper?

Yes, Cheapflights offers price alerts on Washington, D.C. to Belfast flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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