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Cheap flights from Washington, D.C. to Belfast from $387

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 6/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Washington, D.C. to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 pm - 3:15 pm
IAD
-
BFS
13h 45m
2 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$860Multiple Airlines
Tue, Sep 1 - Mon, Sep 14
Multiple Airlines Logo
8:30 pm - 11:20 pm
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$885Multiple Airlines
Tue, Sep 1 - Mon, Sep 14
Multiple Airlines Logo
8:30 pm - 8:40 pm
IAD
-
BFS
19h 10m
2 stops
Multiple Airlines Logo
8:15 pm - 2:25 pm
BFS
-
IAD
47h 10m
3 stops
$895Multiple Airlines
Sat, Sep 12 - Wed, Sep 16
Multiple Airlines Logo
5:05 pm - 3:15 pm
IAD
-
BFS
17h 10m
2 stops
Multiple Airlines Logo
7:00 am - 7:00 pm
BFS
-
IAD
41h 00m
3 stops
$910Multiple Airlines
Tue, Sep 29 - Tue, Oct 6
Multiple Airlines Logo
8:30 pm - 11:20 pm
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
7:00 am - 7:00 pm
BFS
-
IAD
41h 00m
3 stops
$913Multiple Airlines
Tue, Sep 29 - Tue, Oct 6
British Airways Logo
5:45 pm - 9:00 am
IAD
-
BHD
10h 15m
1 stop
British Airways Logo
9:40 am - 5:25 pm
BHD
-
IAD
12h 45m
1 stop
$957British Airways
Tue, Sep 29 - Tue, Oct 6
British Airways Logo
7:15 pm - 12:55 pm
IAD
-
BHD
12h 40m
1 stop
British Airways Logo
6:30 am - 5:25 pm
BHD
-
IAD
15h 55m
1 stop
$979British Airways
Mon, Sep 7 - Fri, Sep 11
KLM Logo
12:30 pm - 9:15 am
IAD
-
BHD
15h 45m
2 stops
KLM Logo
9:50 am - 3:35 pm
BHD
-
IAD
10h 45m
1 stop
$1,053KLM
Sat, Sep 12 - Wed, Sep 16
KLM Logo
12:31 pm - 9:20 am
BWI
-
BHD
15h 49m
2 stops
KLM Logo
9:50 am - 8:50 pm
BHD
-
BWI
16h 00m
2 stops
$1,187KLM
Wed, May 13 - Sun, May 17
American Airlines Logo
9:30 pm - 3:40 pm
BWI
-
BHD
13h 10m
1 stop
American Airlines Logo
1:10 pm - 11:56 pm
BHD
-
BWI
15h 46m
2 stops
$1,241American Airlines
Wed, May 13 - Sun, May 17

Delta flights from Washington, D.C. to Belfast

Our best Delta deals on Washington, D.C. to Belfast flight tickets
Delta
May 15
IAD1:32 pmWashington, D.C. Dulles Intl
22h 23m
2 stops
BHD4:55 pmBelfast City
May 22
BHD9:50 amBelfast City
10h 45m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,194
Delta
May 15
IAD5:40 pmWashington, D.C. Dulles Intl
18h 15m
1 stop
BHD4:55 pmBelfast City
May 22
BHD9:50 amBelfast City
10h 45m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,251
Delta
Jul 18
BWI6:50 pmBaltimore/Washington
17h 05m
2 stops
BHD4:55 pmBelfast City
Jul 31
BHD9:50 amBelfast City
17h 39m
2 stops
BWI10:29 pmBaltimore/Washington
$1,582

KLM flights from Washington, D.C. to Belfast

Our best KLM deals on Washington, D.C. to Belfast flight tickets
KLM
Sep 12
IAD12:30 pmWashington, D.C. Dulles Intl
15h 45m
2 stops
BHD9:15 amBelfast City
Sep 16
BHD9:50 amBelfast City
10h 45m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,053
KLM
May 13
BWI12:31 pmBaltimore/Washington
15h 49m
2 stops
BHD9:20 amBelfast City
May 17
BHD9:50 amBelfast City
16h 00m
2 stops
BWI8:50 pmBaltimore/Washington
$1,187
KLM
May 7
IAD12:37 pmWashington, D.C. Dulles Intl
15h 43m
2 stops
BHD9:20 amBelfast City
May 10
BHD5:30 pmBelfast City
27h 05m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,227

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated May 6, 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 round-trip

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 9/1

8:30 pm-3:15 pm

2 stops13h 45m

Belfast Intl

Mon 9/14

8:15 pm-3:10 pm

3 stops47h 55m

$860

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 9/1

8:30 pm-11:20 pm

3 stops21h 50m

Belfast Intl

Mon 9/14

8:15 pm-3:10 pm

3 stops47h 55m

$885

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 9/12

8:30 pm-8:40 pm

2 stops19h 10m

Belfast Intl

Wed 9/16

8:15 pm-2:25 pm

3 stops47h 10m

$895

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 9/29

5:05 pm-3:15 pm

2 stops17h 10m

Belfast Intl

Tue 10/6

7:00 am-7:00 pm

3 stops41h 00m

$910

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 9/29

8:30 pm-11:20 pm

3 stops21h 50m

Belfast Intl

Tue 10/6

7:00 am-7:00 pm

3 stops41h 00m

$913
Quickest round-trip

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 9/29

5:45 pm-9:00 am

1 stop10h 15m

Belfast City

Tue 10/6

9:40 am-5:25 pm

1 stop12h 45m

$957

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 9/7

7:15 pm-12:55 pm

1 stop12h 40m

Belfast City

Fri 9/11

6:30 am-5:25 pm

1 stop15h 55m

$979

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sat 9/12

12:30 pm-9:15 am

2 stops15h 45m

Belfast City

Wed 9/16

9:50 am-3:35 pm

1 stop10h 45m

$1,053

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Wed 5/13

12:31 pm-9:20 am

2 stops15h 49m

Belfast City

Sun 5/17

9:50 am-8:50 pm

2 stops16h 00m

$1,187

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Wed 5/13

9:30 pm-3:40 pm

1 stop13h 10m

Belfast City

Sun 5/17

1:10 pm-11:56 pm

2 stops15h 46m

$1,241

Flights are sorted by cheapest round-trip 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?

American Airlines is the most popular carrier 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.
Search flight deals

Frequently asked questions about flying from Washington, D.C. to Belfast

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

    Washington, D.C. and Belfast are 3373.5 mi apart from one another. In terms of flight time, this usually takes a little over 10h 15m.

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

    Prices for flights from Washington, D.C. to Belfast refresh daily.

  • How many operators does momondo search for flights from Washington, D.C. to Belfast?

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Belfast.

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

    The necessary travel and health documents for your Belfast trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Washington, D.C. to Belfast

Compare and see reviews for airlines that fly from Washington, D.C. to Belfast with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $652Free CancellationRating
6.7
7,945 reviews
Search British Airways flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Belfast for you.

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 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 Belfast from Washington, D.C..

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

Of course. momondo tracks the price of Washington, D.C. to Belfast flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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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