Cheap flights from Washington, D.C. to Belfast from £257

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 7/7. 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 Washington, D.C. to Belfast

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:00 - 19:15
DCA
-
BFS
32h 15m
3 stops
Multiple Airlines Logo
23:30 - 18:13
BFS
-
DCA
23h 43m
2 stops
£630Multiple Airlines
Wed, 10 Jun - Tue, 16 Jun
Multiple Airlines Logo
06:00 - 19:15
DCA
-
BFS
32h 15m
3 stops
Multiple Airlines Logo
20:10 - 18:13
BFS
-
DCA
27h 03m
3 stops
£645Multiple Airlines
Wed, 10 Jun - Tue, 16 Jun
Multiple Airlines Logo
16:05 - 16:30
IAD
-
BFS
19h 25m
2 stops
Multiple Airlines Logo
08:30 - 20:35
BFS
-
IAD
41h 05m
3 stops
£680Multiple Airlines
Fri, 5 Jun - Wed, 10 Jun
Multiple Airlines Logo
12:45 - 14:55
DCA
-
BHD
21h 10m
3 stops
Multiple Airlines Logo
07:00 - 18:13
BHD
-
DCA
40h 13m
3 stops
£689Multiple Airlines
Sun, 7 Jun - Thu, 11 Jun
British Airways Logo
22:25 - 17:30
IAD
-
BHD
14h 05m
1 stop
British Airways Logo
06:30 - 17:25
BHD
-
IAD
15h 55m
1 stop
£723British Airways
Mon, 7 Sep - Fri, 11 Sep
British Airways Logo
21:35 - 14:35
BWI
-
BHD
12h 00m
1 stop
British Airways Logo
19:30 - 19:40
BHD
-
BWI
29h 10m
1 stop
£723British Airways
Sun, 27 Sep - Thu, 1 Oct
American Airlines Logo
15:54 - 10:20
BWI
-
BHD
14h 26m
2 stops
American Airlines Logo
06:30 - 19:30
BHD
-
BWI
18h 00m
2 stops
£770American Airlines
Sun, 25 Oct - Sun, 1 Nov
American Airlines Logo
14:55 - 10:20
DCA
-
BHD
15h 25m
2 stops
American Airlines Logo
06:30 - 16:51
BHD
-
DCA
15h 21m
2 stops
£770American Airlines
Sun, 25 Oct - Sun, 1 Nov
Delta Logo
10:00 - 09:15
BWI
-
BHD
18h 15m
2 stops
Delta Logo
09:50 - 22:13
BHD
-
BWI
17h 23m
2 stops
£785Delta
Sat, 5 Sep - Wed, 9 Sep
Delta Logo
10:35 - 09:20
DCA
-
BHD
17h 45m
2 stops
Delta Logo
09:50 - 21:50
BHD
-
DCA
17h 00m
2 stops
£785Delta
Thu, 3 Sep - Tue, 8 Sep

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

Our best British Airways deals on Washington, D.C. to Belfast flight tickets
British Airways
15 May
IAD22:25Washington, D.C. Dulles Intl
14h 45m
1 stop
BHD18:10Belfast City
19 May
BHD09:40Belfast City
11h 05m
1 stop
IAD15:45Washington, D.C. Dulles Intl
£651
British Airways
7 Sept
IAD22:25Washington, D.C. Dulles Intl
14h 05m
1 stop
BHD17:30Belfast City
11 Sept
BHD06:30Belfast City
15h 55m
1 stop
IAD17:25Washington, D.C. Dulles Intl
£723
British Airways
7 Sept
IAD17:45Washington, D.C. Dulles Intl
14h 10m
1 stop
BHD12:55Belfast City
11 Sept
BHD06:30Belfast City
15h 55m
1 stop
IAD17:25Washington, D.C. Dulles Intl
£724

Delta flights from Washington, D.C. to Belfast

Our best Delta deals on Washington, D.C. to Belfast flight tickets
Delta
5 Sept
BWI10:00Baltimore/Washington
18h 15m
2 stops
BHD09:15Belfast City
9 Sept
BHD09:50Belfast City
17h 23m
2 stops
BWI22:13Baltimore/Washington
£785
Delta
15 May
IAD17:40Washington, D.C. Dulles Intl
18h 15m
1 stop
BHD16:55Belfast City
22 May
BHD09:50Belfast City
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£879
Delta
15 May
IAD17:40Washington, D.C. Dulles Intl
18h 15m
1 stop
BHD16:55Belfast City
25 May
BHD17:30Belfast City
27h 05m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£884

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 13 May 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

DCA - BFS

DCABFS

Washington, D.C. Reagan-National

Wed 10/6

06:00-19:15

3 stops32h 15m

Belfast Intl

Tue 16/6

23:30-18:13

2 stops23h 43m

£630

Washington, D.C.Belfast

DCA - BFS

DCABFS

Washington, D.C. Reagan-National

Wed 10/6

06:00-19:15

3 stops32h 15m

Belfast Intl

Tue 16/6

20:10-18:13

3 stops27h 03m

£645

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 5/6

16:05-16:30

2 stops19h 25m

Belfast Intl

Wed 10/6

08:30-20:35

3 stops41h 05m

£680

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Sun 7/6

12:45-14:55

3 stops21h 10m

Belfast City

Thu 11/6

07:00-18:13

3 stops40h 13m

£689
Fastest return journey

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 7/9

22:25-17:30

1 stop14h 05m

Belfast City

Fri 11/9

06:30-17:25

1 stop15h 55m

£723

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Sun 27/9

21:35-14:35

1 stop12h 00m

Belfast City

Thu 1/10

19:30-19:40

1 stop29h 10m

£723

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Sun 25/10

15:54-10:20

2 stops14h 26m

Belfast City

Sun 1/11

06:30-19:30

2 stops18h 00m

£770

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Sun 25/10

14:55-10:20

2 stops15h 25m

Belfast City

Sun 1/11

06:30-16:51

2 stops15h 21m

£770

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Sat 5/9

10:00-09:15

2 stops18h 15m

Belfast City

Wed 9/9

09:50-22:13

2 stops17h 23m

£785

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Thu 3/9

10:35-09:20

2 stops17h 45m

Belfast City

Tue 8/9

09:50-21:50

2 stops17h 00m

£785

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 and KLM 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 40m

Direct flights

None
The fastest flight from Washington, D.C. to Belfast takes 10h 40m
There are no direct flights from Washington, D.C. to Belfast. There are no popular flight routes from Washington, D.C. to Belfast.

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 10h 40m 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
Fri 12/6
Fri 19/6

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