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Cheap flights from Washington, D.C. to Belfast from £188

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
11 Jan — 18 Jan1
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 12 December 2025.

Sat 27/1221:45IAD - BHD
1 stop14h 00mBritish Airways
Sun 4/120:25BHD - IAD
2 stops32h 39mBritish Airways
Deal found 11/12£1,094
Sat 27/1215:25DCA - BHD
2 stops17h 50mBritish Airways
Sun 4/120:25BHD - DCA
2 stops27h 15mBritish Airways
Deal found 11/12£1,295
Sat 27/1217:05IAD - BHD
2 stops14h 45mMultiple Airlines
Sun 4/120:25BHD - IAD
2 stops32h 39mMultiple Airlines
Deal found 10/12£1,296
Sat 27/1218:05IAD - BHD
1 stop17h 45mKLM
Sun 4/117:20BHD - IAD
1 stop27h 45mKLM
Deal found 11/12£1,335
Sat 27/1217:50BWI - BHD
2 stops17h 55mBritish Airways
Sun 4/120:25BHD - BWI
2 stops25h 37mBritish Airways
Deal found 10/12£1,560
Sat 27/1220:35BWI - BHD
1 stop12h 40mFinnair
Sun 4/112:10BHD - BWI
1 stop11h 35mFinnair
Deal found 10/12£2,291
Sat 27/1220:35BWI - BHD
1 stop12h 40mMultiple Airlines
Sun 4/112:10BHD - BWI
1 stop11h 35mMultiple Airlines
Deal found 11/12£2,993
Sat 27/1218:59BWI - BHD
2 stops16h 51mKLM
Sun 4/106:30BHD - BWI
2 stops15h 36mKLM
Deal found 11/12£7,527

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 12 December 2025.

Round-trip from

£464

One-way from

£188
British Airways
  • British Airways
  • 5/3-12/3
  • 2 total stops
  • 25h 25m total
  • Washington, D.C. to Belfast
Search Deals
4/2
  • 4/2
  • 3 total stops
  • 41h 35m 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 12 December 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

Thu 5/3

18:20-10:20

1 stop11h 00m

Belfast City

Thu 12/3

06:35-20:55

1 stop18h 20m

£464

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 8/1

21:45-16:40

1 stop13h 55m

Belfast City

Thu 22/1

10:40-19:55

1 stop14h 15m

£466

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Thu 8/1

20:35-14:00

1 stop12h 25m

Belfast City

Thu 22/1

11:05-18:45

1 stop12h 40m

£479

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 8/4

19:15-13:30

1 stop13h 15m

Belfast City

Sun 12/4

11:00-17:25

1 stop11h 25m

£479

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 16/3

22:45-14:15

1 stop11h 30m

Belfast City

Sun 22/3

20:25-16:35

1 stop24h 10m

£479

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Thu 26/3

16:23-10:20

2 stops13h 57m

Belfast City

Mon 30/3

11:35-22:16

2 stops15h 41m

£479

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 11/2

21:45-14:15

1 stop11h 30m

Belfast City

Sun 15/2

09:10-15:35

1 stop11h 25m

£481

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 4/3

18:20-10:15

1 stop10h 55m

Belfast City

Sun 8/3

17:35-16:35

1 stop27h 00m

£481

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Wed 11/2

20:35-14:15

1 stop12h 40m

Belfast City

Sun 15/2

06:30-18:45

1 stop17h 15m

£481

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Wed 25/2

20:35-14:15

1 stop12h 40m

Belfast City

Sun 1/3

10:40-18:45

1 stop13h 05m

£481

Flights are sorted by cheapest return flights first.

Deals found on 11/12

Showing 1-10 of 49 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 can get you from Washington, D.C. to Belfast in just under 11h. Your travel time can differ by up to . Airlines will cover a distance of 3390 mi.

  • 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, Baltimore/Washington - 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

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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

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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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