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Cheap flights from Belfast Intl Airport to Washington, D.C. from £409

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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — WAS
23 May — 30 May1
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 23 April 2026.

Sun 7/622:10
BFS
-
IAD
3 stops46h 00m
Multiple Airlines
Sun 14/617:15
IAD
-
BFS
2 stops20h 35m
Multiple Airlines
Deal found 23/4£620
Thu 21/506:20
BFS
-
IAD
3 stops37h 50m
Multiple Airlines
Thu 28/520:30
IAD
-
BFS
2 stops18h 00m
Multiple Airlines
Deal found 23/4£712
Thu 21/520:05
BFS
-
DCA
2 stops24h 34m
Multiple Airlines
Thu 28/506:00
DCA
-
BFS
3 stops31h 55m
Multiple Airlines
Deal found 23/4£719
Thu 4/608:50
BFS
-
IAD
3 stops35h 20m
Multiple Airlines
Thu 11/620:30
IAD
-
BFS
3 stops18h 50m
Multiple Airlines
Deal found 20/4£776
Sun 7/607:10
BFS
-
DCA
2 stops20h 18m
Multiple Airlines
Sun 14/606:00
DCA
-
BFS
3 stops31h 50m
Multiple Airlines
Deal found 23/4£834
Thu 4/606:10
BFS
-
BWI
2 stops21h 05m
Multiple Airlines
Thu 11/623:20
BWI
-
BFS
2 stops15h 00m
Multiple Airlines
Deal found 20/4£887
Fri 5/618:35
BFS
-
BWI
3 stops32h 40m
Multiple Airlines
Fri 12/606:30
BWI
-
BFS
3 stops33h 15m
Multiple Airlines
Deal found 21/4£927
Thu 21/518:05
BFS
-
BWI
3 stops30h 35m
Multiple Airlines
Thu 28/521:30
BWI
-
BFS
3 stops20h 20m
Multiple Airlines
Deal found 23/4£1,111

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 23 April 2026.

Round-trip from

£620

One-way from

£409
7/6-14/6
  • 7/6-14/6
  • 5 total stops
  • 66h 35m total
  • Belfast to Washington, D.C.
Search Deals
10/8
  • 10/8
  • 3 total stops
  • 49h 06m 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 23 April 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

Sun 7/6

22:10-15:10

3 stops46h 00m

Washington, D.C. Dulles Intl

Sun 14/6

17:15-18:50

2 stops20h 35m

£620

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Thu 21/5

06:20-15:10

3 stops37h 50m

Washington, D.C. Dulles Intl

Thu 28/5

20:30-19:30

2 stops18h 00m

£712

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Thu 21/5

20:05-15:39

2 stops24h 34m

Washington, D.C. Reagan-National

Thu 28/5

06:00-18:55

3 stops31h 55m

£719

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Thu 4/6

08:50-15:10

3 stops35h 20m

Washington, D.C. Dulles Intl

Thu 11/6

20:30-20:20

3 stops18h 50m

£776

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Sun 7/6

07:10-22:28

2 stops20h 18m

Washington, D.C. Reagan-National

Sun 14/6

06:00-18:50

3 stops31h 50m

£834
Fastest return journey

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Thu 4/6

06:10-22:15

2 stops21h 05m

Baltimore/Washington

Thu 11/6

23:20-19:20

2 stops15h 00m

£887

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Fri 5/6

18:35-22:15

3 stops32h 40m

Baltimore/Washington

Fri 12/6

06:30-20:45

3 stops33h 15m

£927

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Thu 21/5

18:05-19:40

3 stops30h 35m

Baltimore/Washington

Thu 28/5

21:30-22:50

3 stops20h 20m

£1,111
Cheapest one-way

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Tue 11/8

16:40-19:15

3 stops31h 35m

£418

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 9/8

22:05-10:46

3 stops41h 41m

£422

Flights are sorted by cheapest return flights first.

Deals found on 20/4

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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
Hanover
Oxon Hill
Gaithersburg
Woodbridge
Arlington
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 Reagan-National flights
Belfast City to Dulles Intl 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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