Find flights
When to book
FAQs

Cheap flights from Washington, D.C. to Belfast from £238

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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
22 Jun — 29 Jun1
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 23 May 2026.

Fri 11/920:30
IAD
-
BFS
2 stops20h 20m
Multiple Airlines
Sun 8/1107:30
BFS
-
IAD
3 stops40h 15m
Multiple Airlines
Deal found 23/5£629
Fri 11/923:20
IAD
-
BFS
2 stops17h 30m
Multiple Airlines
Wed 16/908:30
BFS
-
IAD
3 stops41h 05m
Multiple Airlines
Deal found 19/5£637
Sat 12/920:30
BWI
-
BHD
2 stops19h 05m
Multiple Airlines
Tue 22/910:20
BHD
-
BWI
2 stops38h 05m
Multiple Airlines
Deal found 20/5£652
Sat 12/920:30
IAD
-
BFS
2 stops19h 55m
Multiple Airlines
Mon 21/909:15
BFS
-
IAD
3 stops40h 20m
Multiple Airlines
Deal found 22/5£654
Tue 13/1020:30
IAD
-
BFS
2 stops13h 45m
Multiple Airlines
Wed 11/1107:55
BFS
-
IAD
3 stops36h 20m
Multiple Airlines
Deal found 22/5£666
Tue 13/1020:30
BWI
-
BFS
2 stops13h 45m
Multiple Airlines
Wed 11/1121:20
BFS
-
BWI
3 stops26h 20m
Multiple Airlines
Deal found 22/5£686
Sun 31/508:18
IAD
-
BFS
3 stops31h 42m
Multiple Airlines
Wed 10/608:30
BFS
-
IAD
3 stops41h 05m
Multiple Airlines
Deal found 19/5£698
Fri 11/908:15
IAD
-
BHD
3 stops31h 45m
Multiple Airlines
Wed 16/916:10
BHD
-
IAD
3 stops28h 00m
Multiple Airlines
Deal found 19/5£704
Tue 1/909:55
IAD
-
BHD
2 stops25h 20m
Multiple Airlines
Fri 30/407:00
BHD
-
IAD
3 stops42h 05m
Multiple Airlines
Deal found 20/5£705
Sun 12/709:55
IAD
-
BFS
2 stops27h 30m
Multiple Airlines
Mon 20/720:35
BFS
-
IAD
3 stops28h 49m
Multiple Airlines
Deal found 20/5£706
Sun 12/712:40
DCA
-
BFS
3 stops24h 45m
Multiple Airlines
Mon 20/720:35
BFS
-
DCA
3 stops30h 13m
Multiple Airlines
Deal found 20/5£706
Wed 17/612:45
DCA
-
BFS
3 stops25h 30m
Multiple Airlines
Wed 24/605:55
BFS
-
DCA
2 stops21h 36m
Multiple Airlines
Deal found 20/5£708

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 23 May 2026.

Round-trip from

£637

One-way from

£238
11/9-16/9
  • 11/9-16/9
  • 5 total stops
  • 58h 35m total
  • Washington, D.C. to Belfast
Search Deals
11/9
  • 11/9
  • 2 total stops
  • 25h 00m 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 23 May 2026.
Use the filters below to find and compare flights from Washington, D.C. to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 11/9

20:30-21:50

2 stops20h 20m

Belfast Intl

Sun 8/11

07:30-18:45

3 stops40h 15m

£629

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 12/9

20:30-21:25

2 stops19h 55m

Belfast Intl

Mon 21/9

09:15-20:35

3 stops40h 20m

£654

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 13/10

20:30-15:15

2 stops13h 45m

Belfast Intl

Wed 11/11

07:55-15:15

3 stops36h 20m

£666

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 11/9

08:15-21:50

3 stops32h 35m

Belfast Intl

Wed 16/9

08:30-15:10

3 stops35h 40m

£677

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Tue 13/10

20:30-15:15

2 stops13h 45m

Belfast Intl

Wed 11/11

21:20-18:40

3 stops26h 20m

£686

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 12/7

09:55-18:25

2 stops27h 30m

Belfast Intl

Mon 20/7

20:35-20:24

3 stops28h 49m

£706

Washington, D.C.Belfast

DCA - BFS

DCABFS

Washington, D.C. Reagan-National

Sun 12/7

12:40-18:25

3 stops24h 45m

Belfast Intl

Mon 20/7

20:35-21:48

3 stops30h 13m

£706

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 16/11

18:20-10:40

1 stop11h 20m

Belfast City

Fri 20/11

06:45-15:35

1 stop13h 50m

£727

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 13/9

19:15-10:30

1 stop10h 15m

Belfast City

Wed 16/9

06:30-19:40

1 stop18h 10m

£727

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Mon 28/9

21:30-15:30

1 stop13h 00m

Belfast City

Wed 30/9

19:40-19:40

1 stop29h 00m

£727

Flights are sorted by cheapest return flights first.

Deals found on 22/5

Showing 1-10 of 54 resultsSorted by cheapest first
1
2
3
...
6

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 and Delta can get you from Washington, D.C. to Belfast in just under 11h 20m. Your travel time can differ by up to 7h 35m. 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 Baltimore/Washington - Belfast Intl, Washington, D.C. Dulles Intl - Belfast Intl and Washington, D.C. Reagan-National - 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.