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Cheap flights from Belfast Intl Airport to Washington, D.C. from £357

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.
BFS — WAS
1 Sep — 8 Sep1
1 adult
1 adult, Economy, 0 bags

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

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Washington, D.C.
Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 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£569
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£591
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£603
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£655
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£655
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£660
Fri 28/822:10
BFS
-
IAD
2 stops23h 50m
Multiple Airlines
Fri 4/920:20
IAD
-
BFS
2 stops19h 55m
Multiple Airlines
Deal found 30/7£751
Sat 12/918:30
BFS
-
BWI
2 stops29h 55m
Multiple Airlines
Sat 19/920:30
BWI
-
BFS
2 stops21h 55m
Multiple Airlines
Deal found 29/7£812
Fri 28/807:20
BFS
-
DCA
3 stops19h 28m
Multiple Airlines
Fri 4/906:59
DCA
-
BFS
3 stops26h 51m
Multiple Airlines
Deal found 30/7£828
Mon 14/906:40
BFS
-
BWI
2 stops17h 45m
Multiple Airlines
Mon 21/920:30
BWI
-
BFS
2 stops19h 10m
Multiple Airlines
Deal found 30/7£855
Sun 13/907:10
BFS
-
DCA
2 stops17h 49m
Multiple Airlines
Sun 20/906:59
DCA
-
BFS
2 stops30h 51m
Multiple Airlines
Deal found 30/7£944
Sat 29/806:55
BFS
-
BWI
3 stops44h 20m
Multiple Airlines
Sat 5/920:30
BWI
-
BFS
2 stops17h 25m
Multiple Airlines
Deal found 1/8£993

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

Discover tips and strategies to find the most affordable flight options for your journey from Belfast Intl (BFS) 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 2 August 2026.

Round-trip from

£569

One-way from

£357
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 Intl 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 2 August 2026.
Use the filters below to find and compare flights from Belfast Intl Airport 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

£569

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

£591

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

£655

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

£657

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

£663

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Fri 28/8

22:10-17:00

2 stops23h 50m

Washington, D.C. Dulles Intl

Fri 4/9

20:20-21:15

2 stops19h 55m

£751

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Fri 28/8

07:20-21:48

3 stops19h 28m

Washington, D.C. Reagan-National

Fri 4/9

06:59-14:50

3 stops26h 51m

£828
Fastest return journey

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Mon 14/9

06:40-19:25

2 stops17h 45m

Baltimore/Washington

Mon 21/9

20:30-20:40

2 stops19h 10m

£855

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Sat 12/9

18:30-19:25

2 stops29h 55m

Baltimore/Washington

Sat 19/9

20:30-23:05

3 stops21h 35m

£870

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Sun 13/9

07:10-19:59

2 stops17h 49m

Washington, D.C. Reagan-National

Sun 20/9

06:59-18:50

2 stops30h 51m

£944

Flights are sorted by cheapest return flights first.

Deals found on 1/8

Showing 1-10 of 19 resultsSorted by cheapest first
1
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Best time to book a flight from Belfast Intl to Washington, D.C.

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

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

    The most popular flight routes from Belfast Intl Airport to Washington, D.C. are Belfast Intl - Baltimore/Washington, Belfast Intl - Washington, D.C. Dulles Intl and Belfast Intl - Washington, D.C. Reagan-National.

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast Intl 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
Springfield
Alexandria

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Belfast Intl 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

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How does Cheapflights help users find flights from Belfast Intl to Washington, D.C.?

When you search for this flight from Belfast Intl to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to Washington, D.C.?

Cheapflights simply makes it quick and affordable to book flights from Belfast Intl to Washington, D.C. by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Yes, we can. To see specific flights from Belfast Intl 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 Intl to Washington, D.C. become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington, D.C. from Belfast Intl today and book when prices fit your budget.

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