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Cheap flights from Washington, D.C. to Belfast from £212

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Belfast departing on 5/10. 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 Washington, D.C. to Belfast

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
20:30 - 21:00BWI  Baltimore/Washington-BFS Belfast Intl
19h 30m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
15:50 - 22:15BFS  Belfast Intl-BWI Baltimore/Washington
35h 25m2 stops London Gatwick Reykjavik Keflavik Intl
£553Multiple Airlines
Sun, 27 Sep - Mon, 12 Oct
British Airways Logo
19:15 - 12:00IAD  Washington, D.C. Dulles Intl-BHD Belfast City
11h 45m1 stop London Heathrow
British Airways Logo
09:40 - 20:20BHD  Belfast City-IAD Washington, D.C. Dulles Intl
15h 40m1 stop London Heathrow
£564British Airways
Wed, 7 Oct - Mon, 12 Oct
Multiple Airlines Logo
23:20 - 16:20IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
12h 00m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
20:15 - 15:10BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
47h 55m3 stops London Luton Madrid Barajas Lisbon Humberto Delgado
£572Multiple Airlines
Tue, 1 Sep - Mon, 7 Sep
Multiple Airlines Logo
20:30 - 23:25IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
21h 55m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
06:45 - 15:45BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
38h 00m3 stops Malaga Casablanca Mohamed V Riyadh King Khaled Intl
£573Multiple Airlines
Sat, 19 Sep - Sat, 26 Sep
Multiple Airlines Logo
20:30 - 21:25IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
19h 55m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
10:25 - 05:20BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
47h 55m3 stops Liverpool J. Lennon Madrid Barajas Bogotá El Dorado
£584Multiple Airlines
Sat, 17 Oct - Thu, 22 Oct
Multiple Airlines Logo
20:30 - 21:25IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
19h 55m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
21:10 - 19:00BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
26h 50m2 stops Alicante Casablanca Mohamed V
£590Multiple Airlines
Sat, 17 Oct - Thu, 22 Oct
Multiple Airlines Logo
20:30 - 23:25IAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
21h 55m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Manchester
Multiple Airlines Logo
10:25 - 05:20BFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
47h 55m3 stops Liverpool J. Lennon Madrid Barajas Bogotá El Dorado
£591Multiple Airlines
Sat, 17 Oct - Thu, 22 Oct
British Airways Logo
21:30 - 15:40BWI  Baltimore/Washington-BHD Belfast City
13h 10m1 stop London Heathrow
British Airways Logo
11:35 - 19:40BHD  Belfast City-BWI Baltimore/Washington
13h 05m1 stop London Heathrow
£593British Airways
Wed, 7 Oct - Mon, 12 Oct
Multiple Airlines Logo
20:30 - 23:35BWI  Baltimore/Washington-BFS Belfast Intl
22h 05m3 stops Reykjavik Keflavik Intl Glasgow Intl Birmingham
Multiple Airlines Logo
15:50 - 22:15BFS  Belfast Intl-BWI Baltimore/Washington
35h 25m2 stops London Gatwick Reykjavik Keflavik Intl
£593Multiple Airlines
Sun, 27 Sep - Mon, 12 Oct
Multiple Airlines Logo
20:30 - 20:30IAD  Washington, D.C. Dulles Intl-BHD Belfast City
19h 00m2 stops Reykjavik Keflavik Intl London Gatwick
Multiple Airlines Logo
08:05 - 19:00BHD  Belfast City-IAD Washington, D.C. Dulles Intl
39h 55m3 stops London Luton Madrid Barajas Casablanca Mohamed V
£598Multiple Airlines
Mon, 21 Sep - Tue, 6 Oct

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KLM flights from Washington, D.C. to Belfast

Our best KLM deals on Washington, D.C. to Belfast flight tickets
KLM
27 Jan
IAD19:50Washington, D.C. Dulles Intl
16h 00m
2 stops
BHD16:50Belfast City
3 Feb
BHD09:40Belfast City
18h 22m
2 stops
IAD23:02Washington, D.C. Dulles Intl
£757
KLM
21 Sept
IAD12:25Washington, D.C. Dulles Intl
15h 55m
2 stops
BHD09:20Belfast City
6 Oct
BHD09:50Belfast City
18h 26m
2 stops
IAD23:16Washington, D.C. Dulles Intl
£758
KLM
21 Sept
DCA06:10Washington, D.C. Reagan-National
22h 10m
2 stops
BHD09:20Belfast City
5 Oct
BHD17:30Belfast City
28h 07m
2 stops
DCA16:37Washington, D.C. Reagan-National
£764

American Airlines flights from Washington, D.C. to Belfast

Our best American Airlines deals on Washington, D.C. to Belfast flight tickets
American Airlines
28 Jan
IAD17:46Washington, D.C. Dulles Intl
14h 04m
2 stops
BHD12:50Belfast City
2 Feb
BHD08:45Belfast City
16h 10m
1 stop
IAD19:55Washington, D.C. Dulles Intl
£772
American Airlines
21 Sept
BWI19:09Baltimore/Washington
15h 21m
2 stops
BHD15:30Belfast City
6 Oct
BHD13:45Belfast City
10h 55m
1 stop
BWI19:40Baltimore/Washington
£772
American Airlines
28 Jan
IAD17:46Washington, D.C. Dulles Intl
14h 04m
2 stops
BHD12:50Belfast City
2 Feb
BHD08:45Belfast City
19h 27m
2 stops
IAD23:12Washington, D.C. Dulles Intl
£779

momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. to Belfast 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 6 August 2026.
Use the filters below to find and compare flights from Washington, D.C. to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BaltimoreBelfast

BWI Baltimore/Washington - BFS Belfast Intl

BWIBFS

Baltimore/Washington

Sun 27/9

20:30-21:00

2 stops19h 30m

Belfast Intl

Mon 12/10

15:50-22:15

2 stops35h 25m

£553

Washington, D.C.Belfast

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

IADBHD

Washington, D.C. Dulles Intl

Wed 7/10

19:15-12:00

1 stop11h 45m

Belfast City

Mon 12/10

09:40-20:20

1 stop15h 40m

£564

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Tue 1/9

23:20-16:20

2 stops12h 00m

Belfast Intl

Mon 7/9

20:15-15:10

3 stops47h 55m

£572

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sat 19/9

20:30-23:25

2 stops21h 55m

Belfast Intl

Sat 26/9

06:45-15:45

3 stops38h 00m

£573

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sat 17/10

20:30-21:25

2 stops19h 55m

Belfast Intl

Thu 22/10

10:25-05:20

3 stops47h 55m

£584

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sat 17/10

20:30-21:25

2 stops19h 55m

Belfast Intl

Thu 22/10

21:10-19:00

2 stops26h 50m

£590

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sat 17/10

20:30-23:25

3 stops21h 55m

Belfast Intl

Thu 22/10

10:25-05:20

3 stops47h 55m

£591
Fastest return journey

BaltimoreBelfast

BWI Baltimore/Washington - BHD Belfast City

BWIBHD

Baltimore/Washington

Wed 7/10

21:30-15:40

1 stop13h 10m

Belfast City

Mon 12/10

11:35-19:40

1 stop13h 05m

£593

BaltimoreBelfast

BWI Baltimore/Washington - BFS Belfast Intl

BWIBFS

Baltimore/Washington

Sun 27/9

20:30-23:35

3 stops22h 05m

Belfast Intl

Mon 12/10

15:50-22:15

2 stops35h 25m

£593

Washington, D.C.Belfast

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

IADBHD

Washington, D.C. Dulles Intl

Mon 21/9

20:30-20:30

2 stops19h 00m

Belfast City

Tue 6/10

08:05-19:00

3 stops39h 55m

£598

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. to Belfast

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 Washington, D.C. to Belfast?

KLM, Aer Lingus, and Delta are the most popular carriers operating from Washington, D.C. to Belfast

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

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

Fastest flight time

11h 10m

Direct flights

None
The fastest flight from Washington, D.C. to Belfast takes 11h 10m
There are no direct flights from Washington, D.C. to Belfast. There are no popular flight routes from Washington, D.C. to Belfast.
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Frequently asked questions about flying from Washington, D.C. to Belfast

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

    There are 3373.5 mi between Washington, D.C. and Belfast. Typically, this will take 11h 10m by plane in normal conditions.

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

    Prices for flights from Washington, D.C. to Belfast are refreshed on a daily basis.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Belfast.

  • What documentation or ID do you need to fly to Belfast?

    The travel and health documents required for your trip to Belfast can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Belfast. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

Finding the right flight to Belfast from Washington, D.C. 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 Belfast quick and easy, saving you time and money.

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

Yes. All flights to Belfast from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Washington, D.C. to Belfast flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Belfast from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast
Belfast Intl Airport
Belfast City Airport