Cheap flights from Washington, D.C. to Belfast from £236

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 23/8. 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
0 bags
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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 - 21:30
IAD
-
BFS
20h 00m
2 stops
Multiple Airlines Logo
22:10 - 15:10
BFS
-
IAD
46h 00m
3 stops
£547Multiple Airlines
Sun, 19 Apr - Sun, 26 Apr
Multiple Airlines Logo
20:30 - 21:30
IAD
-
BFS
20h 00m
2 stops
Multiple Airlines Logo
07:35 - 15:10
BFS
-
IAD
36h 35m
3 stops
£551Multiple Airlines
Sun, 26 Apr - Tue, 12 May
Multiple Airlines Logo
20:30 - 23:20
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
13:50 - 15:10
BFS
-
IAD
30h 20m
3 stops
£591Multiple Airlines
Mon, 6 Apr - Thu, 16 Apr
Multiple Airlines Logo
20:30 - 17:20
IAD
-
BHD
15h 50m
2 stops
Multiple Airlines Logo
11:05 - 15:10
BHD
-
IAD
33h 05m
3 stops
£601Multiple Airlines
Sun, 26 Apr - Tue, 12 May
British Airways Logo
21:30 - 13:35
IAD
-
BHD
11h 05m
1 stop
British Airways Logo
09:40 - 19:40
BHD
-
IAD
15h 00m
1 stop
£678British Airways
Wed, 2 Sep - Tue, 15 Sep
British Airways Logo
21:35 - 14:35
BWI
-
BHD
12h 00m
1 stop
British Airways Logo
10:05 - 17:15
BHD
-
BWI
12h 10m
1 stop
£678British Airways
Sun, 6 Sep - Wed, 16 Sep
American Airlines Logo
15:26 - 10:30
IAD
-
BHD
14h 04m
2 stops
American Airlines Logo
13:45 - 20:20
BHD
-
IAD
11h 35m
1 stop
£702American Airlines
Sun, 26 Apr - Tue, 12 May
American Airlines Logo
18:21 - 14:35
BWI
-
BHD
15h 14m
2 stops
American Airlines Logo
10:05 - 00:08
BHD
-
BWI
19h 03m
2 stops
£702American Airlines
Sun, 6 Sep - Wed, 16 Sep
KLM Logo
13:45 - 09:20
DCA
-
BHD
14h 35m
2 stops
KLM Logo
09:50 - 21:50
BHD
-
DCA
17h 00m
2 stops
£740KLM
Wed, 26 Aug - Wed, 2 Sep
KLM Logo
12:59 - 09:20
DCA
-
BHD
15h 21m
2 stops
KLM Logo
09:50 - 20:33
BHD
-
DCA
15h 43m
2 stops
£762KLM
Tue, 28 Apr - Wed, 6 May

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

Our best British Airways deals on Washington, D.C. to Belfast flight tickets
British Airways
6 Sept
BWI21:35Baltimore/Washington
12h 00m
1 stop
BHD14:35Belfast City
16 Sept
BHD10:05Belfast City
12h 10m
1 stop
BWI17:15Baltimore/Washington
£678
British Airways
24 Aug
IAD17:40Washington, D.C. Dulles Intl
14h 15m
1 stop
BHD12:55Belfast City
31 Aug
BHD19:35Belfast City
29h 45m
1 stop
IAD20:20Washington, D.C. Dulles Intl
£689
British Airways
24 Aug
IAD22:25Washington, D.C. Dulles Intl
14h 05m
1 stop
BHD17:30Belfast City
3 Sept
BHD09:35Belfast City
11h 15m
1 stop
IAD15:50Washington, D.C. Dulles Intl
£693

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

Our best American Airlines deals on Washington, D.C. to Belfast flight tickets
American Airlines
6 Sept
BWI18:21Baltimore/Washington
15h 14m
2 stops
BHD14:35Belfast City
16 Sept
BHD10:05Belfast City
19h 03m
2 stops
BWI00:08Baltimore/Washington
£702
American Airlines
21 Apr
DCA15:15Washington, D.C. Reagan-National
14h 30m
2 stops
BHD10:45Belfast City
28 Apr
BHD09:40Belfast City
17h 49m
2 stops
DCA22:29Washington, D.C. Reagan-National
£712
American Airlines
6 Sept
BWI17:38Baltimore/Washington
19h 02m
2 stops
BHD17:40Belfast City
13 Sept
BHD11:00Belfast City
18h 08m
2 stops
BWI00:08Baltimore/Washington
£739

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 24 March 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

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 19/4

20:30-21:30

2 stops20h 00m

Belfast Intl

Sun 26/4

22:10-15:10

3 stops46h 00m

£547

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 26/4

20:30-21:30

2 stops20h 00m

Belfast Intl

Tue 12/5

07:35-15:10

3 stops36h 35m

£551

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 6/4

20:30-23:20

3 stops21h 50m

Belfast Intl

Thu 16/4

13:50-15:10

3 stops30h 20m

£591

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 26/4

20:30-17:20

2 stops15h 50m

Belfast City

Tue 12/5

11:05-15:10

3 stops33h 05m

£601

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 2/9

21:30-13:35

1 stop11h 05m

Belfast City

Tue 15/9

09:40-19:40

1 stop15h 00m

£678
Fastest return journey

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Sun 6/9

21:35-14:35

1 stop12h 00m

Belfast City

Wed 16/9

10:05-17:15

1 stop12h 10m

£678

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 26/4

15:26-10:30

2 stops14h 04m

Belfast City

Tue 12/5

13:45-20:20

1 stop11h 35m

£702

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Sun 6/9

18:21-14:35

2 stops15h 14m

Belfast City

Wed 16/9

10:05-00:08

2 stops19h 03m

£702

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Wed 26/8

13:45-09:20

2 stops14h 35m

Belfast City

Wed 2/9

09:50-21:50

2 stops17h 00m

£740

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Tue 28/4

12:59-09:20

2 stops15h 21m

Belfast City

Wed 6/5

09:50-20:33

2 stops15h 43m

£762

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Belfast from

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?

British Airways, American Airlines, and Aer Lingus 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

10h 20m

Direct flights

None
The fastest flight from Washington, D.C. to Belfast takes 10h 20m
There are no direct flights from Washington, D.C. to Belfast. There are no popular flight routes 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 10h 20m 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.

An easier way to manage your Belfast trip

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1 adult
Thu 23/4
Thu 30/4

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