Cheap flights from Washington, D.C. to Belfast from £360

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 11/9. 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
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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 - 18:55
IAD
-
BFS
17h 25m
2 stops
Multiple Airlines Logo
07:10 - 15:10
BFS
-
IAD
37h 00m
3 stops
£609Multiple Airlines
Sat, 22 Aug - Sun, 30 Aug
Multiple Airlines Logo
23:20 - 23:25
IAD
-
BFS
19h 05m
3 stops
Multiple Airlines Logo
22:10 - 15:10
BFS
-
IAD
46h 00m
3 stops
£626Multiple Airlines
Sat, 22 Aug - Sun, 30 Aug
Multiple Airlines Logo
20:30 - 18:40
IAD
-
BHD
17h 10m
2 stops
Multiple Airlines Logo
07:00 - 22:15
BHD
-
IAD
20h 15m
2 stops
£658Multiple Airlines
Thu, 1 Oct - Wed, 7 Oct
British Airways Logo
20:35 - 11:30
BWI
-
BHD
9h 55m
1 stop
British Airways Logo
09:10 - 18:45
BHD
-
BWI
14h 35m
1 stop
£723British Airways
Tue, 24 Nov - Sun, 29 Nov
British Airways Logo
22:25 - 15:30
IAD
-
BHD
12h 05m
1 stop
British Airways Logo
11:35 - 17:25
BHD
-
IAD
10h 50m
1 stop
£732British Airways
Thu, 1 Oct - Wed, 7 Oct
Delta Logo
18:10 - 09:20
IAD
-
BHD
10h 10m
1 stop
Delta Logo
09:50 - 15:35
BHD
-
IAD
10h 45m
1 stop
£763Delta
Mon, 10 Aug - Thu, 20 Aug
Delta Logo
17:47 - 16:55
IAD
-
BHD
18h 08m
2 stops
Delta Logo
09:50 - 15:35
BHD
-
IAD
10h 45m
1 stop
£767Delta
Mon, 10 Aug - Thu, 20 Aug
American Airlines Logo
19:10 - 15:30
IAD
-
BHD
15h 20m
2 stops
American Airlines Logo
10:05 - 20:20
BHD
-
IAD
15h 15m
1 stop
£778American Airlines
Thu, 1 Oct - Wed, 7 Oct
American Airlines Logo
17:20 - 15:30
BWI
-
BHD
17h 10m
2 stops
American Airlines Logo
06:30 - 21:40
BHD
-
BWI
20h 10m
2 stops
£786American Airlines
Thu, 1 Oct - Wed, 7 Oct
KLM Logo
13:50 - 09:20
DCA
-
BHD
14h 30m
2 stops
KLM Logo
09:50 - 20:33
BHD
-
DCA
15h 43m
2 stops
£834KLM
Sat, 22 Aug - Sun, 30 Aug

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

Our best American Airlines deals on Washington, D.C. to Belfast flight tickets
American Airlines
1 Oct
IAD19:10Washington, D.C. Dulles Intl
15h 20m
2 stops
BHD15:30Belfast City
7 Oct
BHD10:05Belfast City
15h 15m
1 stop
IAD20:20Washington, D.C. Dulles Intl
£778
American Airlines
1 Oct
BWI17:20Baltimore/Washington
17h 10m
2 stops
BHD15:30Belfast City
7 Oct
BHD06:30Belfast City
20h 10m
2 stops
BWI21:40Baltimore/Washington
£786
American Airlines
22 Aug
BWI19:25Baltimore/Washington
17h 50m
1 stop
BHD18:15Belfast City
30 Aug
BHD06:30Belfast City
16h 39m
2 stops
BWI18:09Baltimore/Washington
£923

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

Our best British Airways deals on Washington, D.C. to Belfast flight tickets
British Airways
24 Nov
BWI20:35Baltimore/Washington
9h 55m
1 stop
BHD11:30Belfast City
29 Nov
BHD09:10Belfast City
14h 35m
1 stop
BWI18:45Baltimore/Washington
£723
British Airways
1 Oct
IAD22:25Washington, D.C. Dulles Intl
12h 05m
1 stop
BHD15:30Belfast City
7 Oct
BHD11:35Belfast City
10h 50m
1 stop
IAD17:25Washington, D.C. Dulles Intl
£732
British Airways
16 Nov
IAD21:45Washington, D.C. Dulles Intl
11h 30m
1 stop
BHD14:15Belfast City
19 Nov
BHD06:35Belfast City
18h 20m
1 stop
IAD19:55Washington, D.C. Dulles Intl
£736

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 22 June 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

Sat 22/8

20:30-18:55

2 stops17h 25m

Belfast Intl

Sun 30/8

07:10-15:10

3 stops37h 00m

£609

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 22/8

23:20-23:25

3 stops19h 05m

Belfast Intl

Sun 30/8

22:10-15:10

3 stops46h 00m

£626

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 1/10

20:30-18:40

2 stops17h 10m

Belfast City

Wed 7/10

07:00-22:15

2 stops20h 15m

£658

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Tue 24/11

20:35-11:30

1 stop9h 55m

Belfast City

Sun 29/11

09:10-18:45

1 stop14h 35m

£723

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 1/10

22:25-15:30

1 stop12h 05m

Belfast City

Wed 7/10

11:35-17:25

1 stop10h 50m

£732
Fastest return journey

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 10/8

18:10-09:20

1 stop10h 10m

Belfast City

Thu 20/8

09:50-15:35

1 stop10h 45m

£763

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 10/8

17:47-16:55

2 stops18h 08m

Belfast City

Thu 20/8

09:50-15:35

1 stop10h 45m

£767

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 1/10

19:10-15:30

2 stops15h 20m

Belfast City

Wed 7/10

10:05-20:20

1 stop15h 15m

£778

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Thu 1/10

17:20-15:30

2 stops17h 10m

Belfast City

Wed 7/10

06:30-21:40

2 stops20h 10m

£786

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Sat 22/8

13:50-09:20

2 stops14h 30m

Belfast City

Sun 30/8

09:50-20:33

2 stops15h 43m

£834

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?

Aer Lingus, Delta, 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 15m

Direct flights

None
The fastest flight from Washington, D.C. to Belfast takes 10h 15m
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 15m 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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1 adult
Wed 22/7
Wed 29/7

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