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Cheap flights from Belfast to Washington, D.C. from £383

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 to Washington, D.C. departing on 14/10. 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
08:20 - 19:20-
16h 00m
Multiple Airlines Logo
20:30 - 20:25-
18h 55m
£582Multiple Airlines
Tue, 1 Sep - Mon, 7 Sep
Multiple Airlines Logo
06:10 - 22:15-
21h 05m
Multiple Airlines Logo
23:20 - 20:35-
16h 15m
£617Multiple Airlines
Thu, 17 Sep - Thu, 24 Sep
Multiple Airlines Logo
22:30 - 15:10-
45h 40m
Multiple Airlines Logo
20:30 - 20:40-
19h 10m
£626Multiple Airlines
Tue, 1 Sep - Mon, 7 Sep
Multiple Airlines Logo
08:20 - 19:25-
16h 05m
Multiple Airlines Logo
20:30 - 20:25-
18h 55m
£633Multiple Airlines
Tue, 1 Sep - Mon, 7 Sep
British Airways Logo
07:05 - 20:20-
18h 15m
British Airways Logo
21:30 - 15:05-
12h 35m
£649British Airways
Sat, 29 Aug - Sat, 5 Sep
British Airways Logo
07:05 - 17:15-
15h 10m
British Airways Logo
19:25 - 12:25-
12h 00m
£649British Airways
Sat, 29 Aug - Sat, 5 Sep
Multiple Airlines Logo
21:10 - 15:10-
47h 00m
Multiple Airlines Logo
20:30 - 23:05-
21h 35m
£660Multiple Airlines
Tue, 1 Sep - Mon, 7 Sep
Multiple Airlines Logo
07:00 - 22:15-
20h 15m
Multiple Airlines Logo
23:20 - 20:35-
16h 15m
£684Multiple Airlines
Sat, 29 Aug - Sat, 5 Sep
British Airways Logo
15:40 - 16:20-
29h 40m
British Airways Logo
21:45 - 16:50-
14h 05m
£689British Airways
Wed, 13 Jan - Sun, 17 Jan
Multiple Airlines Logo
20:20 - 19:25-
28h 05m
Multiple Airlines Logo
23:20 - 20:35-
16h 15m
£689Multiple Airlines
Thu, 17 Sep - Thu, 24 Sep

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

Our best British Airways deals on Belfast to Washington, D.C. flight tickets
British Airways
29 Aug
BHD07:05Belfast City
18h 15m
1 stop
IAD20:20Washington, D.C. Dulles Intl
5 Sept
IAD21:30Washington, D.C. Dulles Intl
12h 35m
1 stop
BHD15:05Belfast City
£649
British Airways
13 Jan
BHD15:40Belfast City
29h 40m
2 stops
IAD16:20Washington, D.C. Dulles Intl
17 Jan
IAD21:45Washington, D.C. Dulles Intl
14h 05m
1 stop
BHD16:50Belfast City
£689
British Airways
13 Jan
BHD15:40Belfast City
29h 40m
2 stops
IAD16:20Washington, D.C. Dulles Intl
17 Jan
IAD11:34Washington, D.C. Dulles Intl
21h 21m
2 stops
BHD13:55Belfast City
£690

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 5 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

Tue 1/9

08:20-19:20

2 stops16h 00m

Washington, D.C. Dulles Intl

Mon 7/9

20:30-20:25

2 stops18h 55m

£582

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Thu 17/9

06:10-22:15

2 stops21h 05m

Baltimore/Washington

Thu 24/9

23:20-20:35

2 stops16h 15m

£617

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Tue 1/9

22:30-15:10

3 stops45h 40m

Washington, D.C. Dulles Intl

Mon 7/9

20:30-20:40

2 stops19h 10m

£626

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Tue 1/9

08:20-19:25

2 stops16h 05m

Baltimore/Washington

Mon 7/9

20:30-20:25

2 stops18h 55m

£633

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
Fastest return journey

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.

BFS - IAD

BFSIAD

Belfast Intl

Tue 1/9

21:10-15:10

3 stops47h 00m

Washington, D.C. Dulles Intl

Mon 7/9

20:30-23:05

3 stops21h 35m

£660

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Sat 29/8

07:00-22:15

2 stops20h 15m

Washington, D.C. Dulles Intl

Sat 5/9

23:20-20:35

2 stops16h 15m

£684

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Wed 13/1

15:40-16:20

2 stops29h 40m

Washington, D.C. Dulles Intl

Sun 17/1

21:45-16:50

1 stop14h 05m

£689

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Thu 17/9

20:20-19:25

3 stops28h 05m

Baltimore/Washington

Thu 24/9

23:20-20:35

2 stops16h 15m

£689

Flights are sorted by cheapest return flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
1
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Belfast 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 airline that flies from Belfast to Washington, D.C.?

KLM and British Airways are the most popular carriers operating from Belfast to Washington, D.C.

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

15h 14m

Direct flights

None
The fastest flight from Belfast to Washington, D.C. takes 15h 14m
There are no direct flights from Belfast to Washington, D.C.. There are no popular flight routes from Belfast to Washington, D.C..
Search flight deals

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 15h 14m.

  • 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.

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
Owings Mills
Woodbridge
Bethesda
Silver Spring
Rockville

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