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Cheap flights from Belfast Intl Airport to Washington, D.C. from £296

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Belfast Intl Airport to Washington, D.C. departing on 15/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from Belfast Intl Airport to Washington, D.C.

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
22:45 - 15:35BFS-IAD
45h 50m3 stops
Multiple Airlines Logo
22:30 - 18:55IAD-BFS
15h 25m2 stops
£663Multiple Airlines
Find Deal
Sun, 30 Nov - Sun, 7 Dec
Multiple Airlines Logo
07:10 - 11:45BFS-IAD
33h 35m2 stops
Multiple Airlines Logo
13:30 - 18:55IAD-BFS
24h 25m2 stops
£762Multiple Airlines
Find Deal
Sun, 30 Nov - Sun, 7 Dec
Multiple Airlines Logo
22:45 - 15:35BFS-IAD
45h 50m3 stops
Multiple Airlines Logo
09:45 - 18:55IAD-BFS
28h 10m3 stops
£767Multiple Airlines
Find Deal
Sun, 30 Nov - Sun, 7 Dec
Multiple Airlines Logo
23:05 - 18:40BFS-BWI
24h 35m2 stops
Multiple Airlines Logo
19:40 - 18:55BWI-BFS
18h 15m2 stops
£827Multiple Airlines
Find Deal
Sun, 30 Nov - Sun, 7 Dec
Multiple Airlines Logo
06:30 - 23:17BFS-BWI
45h 47m3 stops
Multiple Airlines Logo
19:40 - 18:55BWI-BFS
18h 15m2 stops
£984Multiple Airlines
Find Deal
Sun, 30 Nov - Sun, 7 Dec

momondo Fare Finder

 
Customise your flight search to find flights from Belfast Intl Airport 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, momondo users made 279,928 searches. Data last updated 17 October 2025.
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

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 30/11

22:45-15:35

3 stops45h 50m

Washington, D.C. Dulles Intl

Sun 7/12

22:30-18:55

2 stops15h 25m

£663

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 30/11

07:10-11:45

2 stops33h 35m

Washington, D.C. Dulles Intl

Sun 7/12

13:30-18:55

2 stops24h 25m

£762

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 30/11

22:45-15:35

3 stops45h 50m

Washington, D.C. Dulles Intl

Sun 7/12

09:45-18:55

3 stops28h 10m

£767

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Sun 30/11

23:05-18:40

2 stops24h 35m

Baltimore/Washington

Sun 7/12

19:40-18:55

2 stops18h 15m

£827

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Sun 30/11

06:30-23:17

3 stops45h 47m

Baltimore/Washington

Sun 7/12

19:40-18:55

2 stops18h 15m

£984

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Mon 15/12

06:50-14:35

3 stops36h 45m

£296

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Mon 15/12

10:50-19:30

2 stops37h 40m

£315

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 22/3

23:05-15:35

3 stops44h 30m

£316

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 22/3

17:00-20:30

2 stops31h 30m

£406

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Mon 15/12

08:50-18:40

2 stops38h 50m

£418

Flights are sorted by cheapest return flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Belfast Intl Airport to Washington, D.C.

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from Belfast Intl Airport is on a Friday. momondo users have found tickets for Friday departures for as low as £737. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Belfast Intl Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £1,040.

When to book flights from Belfast Intl Airport to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from Belfast Intl Airport to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Belfast Intl Airport to Washington, D.C. (BFS to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Belfast Intl Airport to Washington, D.C.

Direct flights

None
There are no direct flights from Belfast Intl Airport to Washington, D.C.. There are no popular flight routes from Belfast Intl Airport to Washington, D.C..
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  • How far is Belfast Intl to Washington, D.C. by plane?

    The straight-line distance from Belfast Intl to Washington, D.C. is 3361.5 mi. 24h 35m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Belfast Intl Airport to Washington, D.C.?

    Prices for flights from Belfast Intl Airport to Washington, D.C. refresh daily.

  • How old do you have to be to fly from Belfast Intl Airport to Washington, D.C.?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Belfast Intl Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The necessary travel and health documents for your Washington, D.C. trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Laurel
College Park
Alexandria
Fairfax
Linthicum Heights
Bethesda
Gettysburg
Cambridge
Ellicott City
Westminster
Arlington
Woodbridge
Owings Mills
Silver Spring
National Harbor

Why use momondo?

Why should I use momondo to find a flight deal from Belfast to Washington, D.C.?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Belfast to Washington, D.C. for you.

Can I find flights from Belfast to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Belfast to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from Belfast to Washington, D.C.?

momondo helps you find the best flight between Belfast and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Belfast to Washington, D.C. right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Belfast to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

An easier way to manage your Washington, D.C. trip

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport