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Cheap flights from Belfast to Washington, D.C. from £358

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 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — WAS
31 Aug — 7 Sep1
1 adult
1 adult, Economy, 0 bags

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

Enter your travel dates to find the best prices.

Cheapest flights from Belfast to Washington, D.C.
Explore the most affordable flight options available from Belfast to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 August 2026.

Thu 10/906:10
BFS
-
IAD
2 stops18h 10m
Multiple Airlines
Thu 17/920:30
IAD
-
BFS
2 stops19h 05m
Multiple Airlines
Deal found 29/7£570
Sun 13/921:40
BFS
-
IAD
3 stops45h 35m
Multiple Airlines
Sun 20/920:30
IAD
-
BFS
2 stops20h 00m
Multiple Airlines
Deal found 30/7£592
Thu 10/906:10
BFS
-
BWI
2 stops18h 15m
Multiple Airlines
Thu 17/923:20
BWI
-
BFS
2 stops16h 15m
Multiple Airlines
Deal found 29/7£605
Fri 11/920:15
BFS
-
IAD
3 stops47h 00m
Multiple Airlines
Fri 18/923:20
IAD
-
BFS
2 stops17h 30m
Multiple Airlines
Deal found 28/7£609
Sat 29/807:05
BHD
-
BWI
1 stop15h 10m
British Airways
Sat 5/919:25
BWI
-
BHD
1 stop12h 00m
British Airways
Deal found 1/8£649
Sat 29/807:05
BHD
-
IAD
1 stop18h 15m
British Airways
Sat 5/921:30
IAD
-
BHD
1 stop12h 35m
British Airways
Deal found 1/8£649
Wed 26/806:30
BHD
-
IAD
1 stop18h 50m
British Airways
Wed 2/922:25
IAD
-
BHD
1 stop12h 15m
British Airways
Deal found 29/7£655
Wed 26/805:55
BFS
-
DCA
3 stops20h 53m
Multiple Airlines
Wed 2/906:59
DCA
-
BFS
2 stops27h 56m
Multiple Airlines
Deal found 29/7£656
Thu 10/908:20
BFS
-
DCA
3 stops18h 30m
Multiple Airlines
Thu 17/911:00
DCA
-
BFS
3 stops26h 55m
Multiple Airlines
Deal found 29/7£657
Wed 26/815:05
BFS
-
IAD
2 stops30h 55m
Multiple Airlines
Wed 2/920:20
IAD
-
BFS
2 stops21h 00m
Multiple Airlines
Deal found 29/7£661
Fri 4/920:10
BHD
-
IAD
2 stops24h 20m
British Airways
Tue 8/913:23
IAD
-
BHD
2 stops16h 22m
British Airways
Deal found 28/7£671
Thu 5/1111:05
BHD
-
BWI
1 stop12h 40m
British Airways
Mon 9/1114:26
BWI
-
BHD
2 stops21h 59m
British Airways
Deal found 28/7£675

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

Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) to Washington, D.C. (WAS). 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 1 August 2026.

Round-trip from

£570

One-way from

£358
10/9-17/9
  • 10/9-17/9
  • 4 total stops
  • 37h 15m total
  • Belfast to Washington, D.C.
Search Deals
17/10
  • 17/10
  • 3 total stops
  • 40h 20m total
  • Belfast to Washington, D.C.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast to Washington, D.C. 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 1 August 2026.
Use the filters below to find and compare flights from Belfast to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Thu 10/9

06:10-19:20

2 stops18h 10m

Washington, D.C. Dulles Intl

Thu 17/9

20:30-20:35

2 stops19h 05m

£570

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 13/9

21:40-14:15

3 stops45h 35m

Washington, D.C. Dulles Intl

Sun 20/9

20:30-21:30

2 stops20h 00m

£592

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Fri 11/9

20:15-14:15

3 stops47h 00m

Washington, D.C. Dulles Intl

Fri 18/9

23:20-21:50

2 stops17h 30m

£609

BelfastBaltimore

BHD - BWI

BHDBWI

Belfast City

Sat 29/8

07:05-17:15

1 stop15h 10m

Baltimore/Washington

Sat 5/9

19:25-12:25

1 stop12h 00m

£649

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Sat 29/8

07:05-20:20

1 stop18h 15m

Washington, D.C. Dulles Intl

Sat 5/9

21:30-15:05

1 stop12h 35m

£649

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Thu 10/9

08:20-21:50

3 stops18h 30m

Washington, D.C. Reagan-National

Thu 17/9

11:00-18:55

3 stops26h 55m

£657

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Wed 26/8

05:55-21:48

3 stops20h 53m

Washington, D.C. Reagan-National

Wed 2/9

06:00-15:55

3 stops28h 55m

£658

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Wed 26/8

15:05-17:00

2 stops30h 55m

Washington, D.C. Dulles Intl

Wed 2/9

20:20-22:20

2 stops21h 00m

£664

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Fri 4/9

20:10-15:30

2 stops24h 20m

Washington, D.C. Dulles Intl

Tue 8/9

13:23-10:45

2 stops16h 22m

£671

BelfastBaltimore

BHD - BWI

BHDBWI

Belfast City

Thu 5/11

11:05-18:45

1 stop12h 40m

Baltimore/Washington

Mon 9/11

14:26-17:25

2 stops21h 59m

£675

Flights are sorted by cheapest return flights first.

Deals found on 30/7

Showing 1-10 of 45 resultsSorted by cheapest first
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Best time to book a flight from Belfast to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Belfast 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 Belfast to Washington, D.C.

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 Belfast to Washington, D.C.. 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 Belfast to Washington, D.C.?

    Departing from Belfast to Washington, D.C. will take you 15h 10m. Airlines will cover a distance of 3348 mi.

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

    When deciding which route to take from Belfast to Washington, D.C. consider Belfast Intl - Baltimore/Washington, Belfast Intl - Washington, D.C. Dulles Intl or Belfast Intl - Washington, D.C. Reagan-National as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast to Washington, D.C. 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

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Silver Spring
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Alexandria

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Belfast to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Belfast Intl to Dulles Intl flights
Belfast City to Dulles Intl flights
Belfast City to Reagan-National flights

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 Belfast to Washington, D.C.?

Cheapflights makes it easy to find Belfast to Washington, D.C. 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 Belfast to Washington, D.C.?

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 Washington, D.C. from Belfast.

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

Yes, we can. To see specific flights from Belfast to Washington, D.C. with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Not ready to book yet? You can track prices for flights from Belfast to Washington, D.C. on Cheapflights with our Price Alert feature and get notified when better prices are available.

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