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Cheap flights from Belfast to Washington, D.C. from £537

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Belfast to Washington, D.C. departing on 4/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Belfast to Washington, D.C.

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:05 - 22:15BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
21h 10m2 stops London Gatwick Reykjavik Keflavik Intl
Multiple Airlines Logo
20:30 - 21:05IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
19h 35m2 stops Reykjavik Keflavik Intl London Gatwick
£537Multiple Airlines
Fri, 4 Sep - Tue, 8 Sep
Multiple Airlines Logo
07:00 - 22:15BHD  Belfast City-IAD Washington, D.C. Dulles Intl
20h 15m2 stops London Gatwick Reykjavik Keflavik Intl
Multiple Airlines Logo
20:30 - 17:50IAD  Washington, D.C. Dulles Intl-BHD Belfast City
16h 20m2 stops Reykjavik Keflavik Intl London Gatwick
£558Multiple Airlines
Fri, 4 Sep - Tue, 8 Sep
Multiple Airlines Logo
06:10 - 19:35BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
18h 25m2 stops London Gatwick Paris Charles de Gaulle
Multiple Airlines Logo
21:45 - 19:20IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
16h 35m2 stops Paris Charles de Gaulle London Gatwick
£586Multiple Airlines
Thu, 24 Sep - Thu, 1 Oct
Multiple Airlines Logo
22:10 - 05:20BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
36h 10m3 stops London Luton Madrid Barajas Bogotá El Dorado
Multiple Airlines Logo
23:20 - 21:00IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
16h 40m2 stops Reykjavik Keflavik Intl Glasgow Intl
£594Multiple Airlines
Sun, 20 Sep - Sun, 27 Sep
Multiple Airlines Logo
06:10 - 22:15BFS  Belfast Intl-BWI Baltimore/Washington
21h 05m2 stops London Gatwick Reykjavik Keflavik Intl
Multiple Airlines Logo
23:20 - 19:20BWI  Baltimore/Washington-BFS Belfast Intl
15h 00m2 stops Reykjavik Keflavik Intl London Gatwick
£608Multiple Airlines
Thu, 24 Sep - Thu, 1 Oct
Multiple Airlines Logo
21:10 - 16:45BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
24h 35m2 stops London Gatwick Zurich
Multiple Airlines Logo
22:20 - 22:35IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
19h 15m2 stops Munich Franz Josef Strauss London Stansted
£612Multiple Airlines
Sun, 20 Sep - Sun, 27 Sep
Multiple Airlines Logo
07:05 - 19:25BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
17h 20m2 stops Manchester Dublin
Multiple Airlines Logo
17:15 - 21:20IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
23h 05m2 stops Dublin Manchester
£635Multiple Airlines
Fri, 4 Sep - Tue, 8 Sep
Multiple Airlines Logo
22:10 - 14:15BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
45h 05m3 stops London Luton Madrid Barajas Bogotá El Dorado
Multiple Airlines Logo
09:45 - 21:55IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
31h 10m3 stops Montreal Pierre Elliott Trudeau Intl Madrid Barajas London Stansted
£644Multiple Airlines
Sun, 20 Sep - Sun, 27 Sep
Multiple Airlines Logo
06:05 - 11:20BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
34h 15m3 stops London Gatwick Montreal Pierre Elliott Trudeau Intl Toronto Island
Multiple Airlines Logo
17:05 - 15:15IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
17h 10m2 stops Lisbon Humberto Delgado Manchester
£650Multiple Airlines
Fri, 4 Sep - Tue, 8 Sep
Multiple Airlines Logo
21:10 - 21:24BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
29h 14m2 stops London Gatwick Toronto Pearson Intl
Multiple Airlines Logo
23:20 - 21:00IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
16h 40m2 stops Reykjavik Keflavik Intl Glasgow Intl
£652Multiple Airlines
Sun, 20 Sep - Sun, 27 Sep

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Delta flights from Belfast to Washington, D.C.

Our best Delta deals on Belfast to Washington, D.C. flight tickets
Delta
4 Sept
BHD09:50Belfast City
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
8 Sept
IAD11:10Washington, D.C. Dulles Intl
17h 10m
2 stops
BHD09:20Belfast City
£672
Delta
24 Sept
BHD09:50Belfast City
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
1 Oct
IAD11:10Washington, D.C. Dulles Intl
17h 10m
2 stops
BHD09:20Belfast City
£674
Delta
4 Sept
BHD09:50Belfast City
18h 23m
2 stops
BWI23:13Baltimore/Washington
8 Sept
BWI17:40Baltimore/Washington
18h 15m
2 stops
BHD16:55Belfast City
£676

British Airways flights from Belfast to Washington, D.C.

Our best British Airways deals on Belfast to Washington, D.C. flight tickets
British Airways
4 Sept
BHD09:35Belfast City
15h 05m
1 stop
BWI19:40Baltimore/Washington
8 Sept
BWI19:25Baltimore/Washington
10h 20m
1 stop
BHD10:45Belfast City
£675
British Airways
3 Sept
BHD06:30Belfast City
17h 25m
2 stops
IAD18:55Washington, D.C. Dulles Intl
7 Sept
IAD17:34Washington, D.C. Dulles Intl
16h 56m
2 stops
BHD15:30Belfast City
£687
British Airways
3 Sept
BHD06:30Belfast City
17h 25m
2 stops
IAD18:55Washington, D.C. Dulles Intl
7 Sept
IAD22:25Washington, D.C. Dulles Intl
12h 05m
1 stop
BHD15:30Belfast City
£688

momondo 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, momondo users made 279,928 searches. Data last updated 11 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 Belfast Intl - IAD Washington, D.C. Dulles Intl

BFSIAD

Belfast Intl

Fri 4/9

06:05-22:15

2 stops21h 10m

Washington, D.C. Dulles Intl

Tue 8/9

20:30-21:05

2 stops19h 35m

£537

BelfastWashington, D.C.

BHD Belfast City - IAD Washington, D.C. Dulles Intl

BHDIAD

Belfast City

Fri 4/9

07:00-22:15

2 stops20h 15m

Washington, D.C. Dulles Intl

Tue 8/9

20:30-17:50

2 stops16h 20m

£558
Fastest return journey

BelfastWashington, D.C.

BFS Belfast Intl - IAD Washington, D.C. Dulles Intl

BFSIAD

Belfast Intl

Thu 24/9

06:10-19:35

2 stops18h 25m

Washington, D.C. Dulles Intl

Thu 1/10

21:45-19:20

2 stops16h 35m

£586

BelfastWashington, D.C.

BFS Belfast Intl - IAD Washington, D.C. Dulles Intl

BFSIAD

Belfast Intl

Sun 20/9

22:10-05:20

3 stops36h 10m

Washington, D.C. Dulles Intl

Sun 27/9

23:20-21:00

2 stops16h 40m

£594

BelfastBaltimore

BFS Belfast Intl - BWI Baltimore/Washington

BFSBWI

Belfast Intl

Thu 24/9

06:10-22:15

2 stops21h 05m

Baltimore/Washington

Thu 1/10

23:20-19:20

2 stops15h 00m

£608

BelfastWashington, D.C.

BFS Belfast Intl - IAD Washington, D.C. Dulles Intl

BFSIAD

Belfast Intl

Sun 20/9

21:10-16:45

2 stops24h 35m

Washington, D.C. Dulles Intl

Sun 27/9

22:20-22:35

2 stops19h 15m

£612

BelfastWashington, D.C.

BFS Belfast Intl - IAD Washington, D.C. Dulles Intl

BFSIAD

Belfast Intl

Fri 4/9

07:05-19:25

2 stops17h 20m

Washington, D.C. Dulles Intl

Tue 8/9

17:15-21:20

2 stops23h 05m

£635

BelfastWashington, D.C.

BFS Belfast Intl - IAD Washington, D.C. Dulles Intl

BFSIAD

Belfast Intl

Sun 20/9

22:10-14:15

3 stops45h 05m

Washington, D.C. Dulles Intl

Sun 27/9

09:45-21:55

3 stops31h 10m

£644

BelfastWashington, D.C.

BFS Belfast Intl - IAD Washington, D.C. Dulles Intl

BFSIAD

Belfast Intl

Fri 4/9

06:05-11:20

3 stops34h 15m

Washington, D.C. Dulles Intl

Tue 8/9

17:05-15:15

2 stops17h 10m

£650

BelfastWashington, D.C.

BFS Belfast Intl - IAD Washington, D.C. Dulles Intl

BFSIAD

Belfast Intl

Sun 20/9

21:10-21:24

2 stops29h 14m

Washington, D.C. Dulles Intl

Sun 27/9

23:20-21:00

2 stops16h 40m

£652

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

Cheap Belfast to Washington, D.C. flight deals and tips

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

Fastest flight time

14h 55m

Direct flights

None
The fastest flight from Belfast to Washington, D.C. takes 14h 55m
There are no direct flights from Belfast to Washington, D.C.. There are no popular flight routes from Belfast to Washington, D.C..
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Frequently asked questions about flying from Belfast to Washington, D.C.

  • How far is Belfast to Washington, D.C. by plane?

    Belfast and Washington, D.C. are 3373.5 mi apart from one another. By plane, this route typically takes 14h 55m.

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Belfast to Washington, D.C..

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

    The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Frequently asked questions about flying from Belfast to Washington, D.C.

  • How do I get Price Alerts for flights from Belfast to Washington, D.C.?

    Confirm your travel details to search for the latest offers for flights from Belfast to Washington, D.C.. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Belfast to Washington, D.C. with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
College Park
Springfield
Fairfax
Arlington
Gettysburg
Linthicum Heights
National Harbor
Ellicott City
Cambridge
Glen Burnie
Westminster
Laurel
Lutherville Timonium
Lexington Park
Woodbridge
Bethesda
Silver Spring
Rockville
Landover

Why use momondo?

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

Finding the right flight to Washington, D.C. from Belfast is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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

Flights from Belfast to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from Belfast.

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 simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Belfast and alert you when they change.

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

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
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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