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Cheap flights from Washington, D.C. to Belfast from £473

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
25 Nov — 2 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 26 October 2025.

Wed 3/1218:20IAD - BHD
1 stop9h 50mBritish Airways
Wed 10/1211:25BHD - IAD
1 stop13h 30mBritish Airways
Deal found 25/10£473
Wed 26/1118:20IAD - BHD
1 stop9h 50mBritish Airways
Wed 3/1211:25BHD - IAD
1 stop33h 10mBritish Airways
Deal found 24/10£477
Wed 26/1120:35BWI - BHD
1 stop29h 55mBritish Airways
Wed 3/1212:25BHD - BWI
1 stop11h 20mBritish Airways
Deal found 24/10£484
Thu 6/1118:05IAD - BHD
1 stop21h 55mDelta
Sun 16/1106:30BHD - IAD
1 stop14h 35mDelta
Deal found 24/10£492
Wed 12/1106:00IAD - BHD
2 stops34h 00mDelta
Sun 16/1106:30BHD - IAD
1 stop14h 35mDelta
Deal found 25/10£495
Wed 12/1115:35IAD - BHD
2 stops20h 15mDelta
Tue 18/1117:20BHD - IAD
1 stop27h 45mDelta
Deal found 24/10£496
Tue 9/1219:40BWI - BFS
2 stops12h 05mMultiple Airlines
Tue 16/1208:35BFS - BWI
2 stops15h 05mMultiple Airlines
Deal found 25/10£497
Thu 6/1118:05IAD - BHD
1 stop17h 45mDelta
Wed 12/1106:30BHD - IAD
2 stops17h 38mDelta
Deal found 24/10£499
Wed 10/1219:40BWI - BFS
2 stops20h 00mMultiple Airlines
Wed 17/1207:20BFS - BWI
2 stops16h 20mMultiple Airlines
Deal found 26/10£499
Wed 12/1112:11IAD - BHD
2 stops23h 39mVirgin Atlantic
Sun 16/1106:30BHD - IAD
2 stops21h 33mVirgin Atlantic
Deal found 25/10£502
Wed 3/1214:41BWI - BHD
2 stops21h 09mKLM
Wed 10/1206:30BHD - BWI
2 stops18h 02mKLM
Deal found 25/10£502
Wed 26/1116:35DCA - BHD
2 stops19h 15mDelta
Wed 3/1206:30BHD - DCA
2 stops21h 27mDelta
Deal found 25/10£502

Cheap 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 26 October 2025.

Round-trip from

£473

Popular in

June

Cheapest in

February
British Airways
  • British Airways
  • 3/12-10/12
  • 2 total stops
  • 23h 20m total
  • Washington, D.C. to Belfast
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£103 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£25 potential savings vs. average return price).
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 26 October 2025.
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 3/12

18:20-09:10

1 stop9h 50m

Belfast City

Wed 10/12

11:25-19:55

1 stop13h 30m

£473

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 16/3

19:20-10:40

1 stop11h 20m

Belfast City

Sun 22/3

09:10-16:40

1 stop11h 30m

£480

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 8/3

19:20-10:20

1 stop11h 00m

Belfast City

Sat 21/3

09:15-20:55

1 stop15h 40m

£480

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Sat 21/3

21:35-14:15

1 stop12h 40m

Belfast City

Sat 28/3

18:00-19:40

1 stop29h 40m

£484

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 1/4

19:15-11:55

1 stop11h 40m

Belfast City

Wed 8/4

06:50-17:25

1 stop15h 35m

£491

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 9/11

18:05-16:50

1 stop17h 45m

Belfast City

Sat 15/11

17:20-16:05

1 stop27h 45m

£492

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 6/11

18:05-21:00

1 stop21h 55m

Belfast City

Sun 16/11

06:30-16:05

1 stop14h 35m

£492

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 6/11

18:05-21:00

1 stop21h 55m

Belfast City

Sat 15/11

06:30-16:05

1 stop14h 35m

£492

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 26/11

18:05-16:50

1 stop17h 45m

Belfast City

Wed 3/12

06:30-16:05

1 stop14h 35m

£492

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 10/11

18:05-16:50

1 stop17h 45m

Belfast City

Sun 16/11

06:30-16:05

1 stop14h 35m

£492

Flights are sorted by cheapest return flights first.

Deals found on 25/10

Showing 1-10 of 30 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 11h 19m. 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

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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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