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Cheap flights from Washington, D.C. to Belfast from £186

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 22/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
13 Aug — 20 Aug1
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 14 July 2026.

Sun 23/820:30
IAD
-
BFS
2 stops20h 20m
Multiple Airlines
Mon 7/920:15
BFS
-
IAD
3 stops47h 55m
Multiple Airlines
Deal found 11/7£550
Tue 24/1119:40
IAD
-
BFS
2 stops20h 15m
Multiple Airlines
Sun 29/1122:00
BFS
-
IAD
3 stops45h 45m
Multiple Airlines
Deal found 13/7£590
Sun 6/920:30
IAD
-
BFS
2 stops20h 20m
Multiple Airlines
Sat 12/920:15
BFS
-
IAD
3 stops47h 55m
Multiple Airlines
Deal found 11/7£591
Tue 1/923:20
IAD
-
BFS
2 stops16h 45m
Multiple Airlines
Mon 7/920:15
BFS
-
IAD
3 stops47h 55m
Multiple Airlines
Deal found 11/7£597
Sat 22/806:00
DCA
-
BFS
3 stops21h 55m
Multiple Airlines
Sat 29/822:25
BFS
-
DCA
2 stops29h 06m
Multiple Airlines
Deal found 10/7£653
Sat 22/820:30
IAD
-
BFS
2 stops21h 55m
Multiple Airlines
Sat 29/806:55
BFS
-
IAD
3 stops19h 19m
Multiple Airlines
Deal found 9/7£657
Tue 24/1119:40
BWI
-
BFS
2 stops20h 15m
Multiple Airlines
Sun 29/1122:00
BFS
-
BWI
3 stops25h 40m
Multiple Airlines
Deal found 13/7£657
Sat 22/820:30
BWI
-
BFS
2 stops21h 55m
Multiple Airlines
Sat 29/820:15
BFS
-
BWI
3 stops31h 00m
Multiple Airlines
Deal found 10/7£659
Sun 23/809:45
IAD
-
BHD
3 stops21h 10m
Multiple Airlines
Mon 7/917:30
BHD
-
IAD
3 stops32h 05m
Multiple Airlines
Deal found 11/7£668
Sat 22/820:30
IAD
-
BFS
2 stops21h 55m
Multiple Airlines
Sun 30/822:10
BFS
-
IAD
2 stops22h 35m
Multiple Airlines
Deal found 11/7£673
Tue 24/1118:05
IAD
-
BHD
1 stop12h 25m
British Airways
Sun 29/1109:10
BHD
-
IAD
1 stop11h 30m
British Airways
Deal found 13/7£686
Sat 22/806:59
DCA
-
BFS
2 stops20h 56m
Multiple Airlines
Sun 30/821:25
BFS
-
DCA
2 stops30h 06m
Multiple Airlines
Deal found 11/7£690

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 14 July 2026.

Round-trip from

£550

One-way from

£186
23/8-7/9
  • 23/8-7/9
  • 5 total stops
  • 68h 15m total
  • Washington, D.C. to Belfast
Search Deals
22/8
  • 22/8
  • 3 total stops
  • 31h 20m 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 14 July 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

Sun 23/8

20:30-21:50

2 stops20h 20m

Belfast Intl

Mon 7/9

20:15-15:10

3 stops47h 55m

£550

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 24/11

19:40-20:55

2 stops20h 15m

Belfast Intl

Sun 29/11

22:00-14:45

3 stops45h 45m

£590

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 6/9

20:30-21:50

2 stops20h 20m

Belfast Intl

Sat 12/9

20:15-15:10

3 stops47h 55m

£591

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 1/9

23:20-21:05

2 stops16h 45m

Belfast Intl

Mon 7/9

20:15-15:10

3 stops47h 55m

£597

Washington, D.C.Belfast

DCA - BFS

DCABFS

Washington, D.C. Reagan-National

Sat 22/8

06:00-08:55

3 stops21h 55m

Belfast Intl

Sat 29/8

22:25-22:31

2 stops29h 06m

£653

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Tue 24/11

19:40-20:55

2 stops20h 15m

Belfast Intl

Sun 29/11

22:00-18:40

3 stops25h 40m

£657

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Sat 22/8

20:30-23:25

2 stops21h 55m

Belfast Intl

Sat 29/8

20:15-22:15

3 stops31h 00m

£659

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 22/8

20:30-23:25

2 stops21h 55m

Belfast Intl

Sat 29/8

22:25-15:24

2 stops21h 59m

£661

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 22/8

20:30-23:25

2 stops21h 55m

Belfast Intl

Sun 30/8

22:10-15:45

2 stops22h 35m

£673

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 23/8

20:30-17:20

2 stops15h 50m

Belfast City

Mon 7/9

07:00-19:25

2 stops17h 25m

£683

Flights are sorted by cheapest return flights first.

Deals found on 13/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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 and Delta can get you from Washington, D.C. to Belfast in just under 12h 25m. Your travel time can differ by up to 5h 50m. 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. Reagan-National - Belfast Intl, Washington, D.C. Dulles Intl - Belfast Intl 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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