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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from $344

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. Dulles Intl Airport to Belfast departing on 6/1. 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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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 pm - 11:20 pm
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
11:30 pm - 3:10 pm
BFS
-
IAD
44h 40m
3 stops
$646Multiple Airlines
Tue, Apr 14 - Tue, Apr 21
American Airlines Logo
4:46 pm - 10:20 am
IAD
-
BHD
13h 34m
2 stops
American Airlines Logo
6:35 am - 8:55 pm
BHD
-
IAD
18h 20m
1 stop
$650American Airlines
Thu, Mar 19 - Thu, Mar 26
Multiple Airlines Logo
8:30 pm - 8:55 pm
IAD
-
BFS
19h 25m
2 stops
Multiple Airlines Logo
6:15 am - 7:20 pm
BFS
-
IAD
42h 05m
2 stops
$664Multiple Airlines
Tue, Apr 14 - Tue, Apr 21
British Airways Logo
10:25 pm - 7:25 pm
IAD
-
BHD
16h 00m
1 stop
British Airways Logo
9:40 am - 5:25 pm
BHD
-
IAD
12h 45m
1 stop
$668British Airways
Thu, Apr 30 - Tue, May 12
Delta Logo
7:05 pm - 4:40 pm
IAD
-
BHD
17h 35m
1 stop
Delta Logo
5:20 pm - 5:05 pm
BHD
-
IAD
27h 45m
1 stop
$669Delta
Thu, Mar 19 - Tue, Mar 24
British Airways Logo
7:15 pm - 3:30 pm
IAD
-
BHD
15h 15m
1 stop
British Airways Logo
9:40 am - 3:50 pm
BHD
-
IAD
11h 10m
1 stop
$670British Airways
Thu, Aug 27 - Mon, Aug 31
Delta Logo
7:59 pm - 4:40 pm
IAD
-
BHD
16h 41m
2 stops
Delta Logo
5:20 pm - 5:05 pm
BHD
-
IAD
27h 45m
1 stop
$674Delta
Mon, Mar 16 - Tue, Mar 24
Multiple Airlines Logo
8:30 pm - 11:20 pm
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
8:55 am - 3:10 pm
BFS
-
IAD
35h 15m
3 stops
$678Multiple Airlines
Mon, Apr 13 - Mon, Apr 27
KLM Logo
6:10 pm - 9:20 am
IAD
-
BHD
10h 10m
1 stop
KLM Logo
9:50 am - 12:42 am
BHD
-
IAD
19h 52m
2 stops
$714KLM
Mon, Apr 13 - Mon, Apr 27
Air Europa Logo
5:40 pm - 9:20 am
IAD
-
BHD
10h 40m
1 stop
Air Europa Logo
5:30 pm - 3:35 pm
BHD
-
IAD
27h 05m
1 stop
$733Air Europa
Thu, Aug 27 - Mon, Aug 31

British Airways flights from Washington, D.C. Dulles Intl Airport to Belfast

Our best British Airways deals on Washington, D.C. Dulles Intl Airport to Belfast flight tickets
British Airways
Apr 30
IAD10:25 pmWashington, D.C. Dulles Intl
16h 00m
1 stop
BHD7:25 pmBelfast City
May 12
BHD9:40 amBelfast City
12h 45m
1 stop
IAD5:25 pmWashington, D.C. Dulles Intl
$668
British Airways
Aug 27
IAD7:15 pmWashington, D.C. Dulles Intl
15h 15m
1 stop
BHD3:30 pmBelfast City
Aug 31
BHD9:40 amBelfast City
11h 10m
1 stop
IAD3:50 pmWashington, D.C. Dulles Intl
$670
British Airways
Apr 2
IAD7:15 pmWashington, D.C. Dulles Intl
19h 10m
1 stop
BHD7:25 pmBelfast City
Apr 7
BHD8:25 pmBelfast City
26h 00m
1 stop
IAD5:25 pmWashington, D.C. Dulles Intl
$747

KLM flights from Washington, D.C. Dulles Intl Airport to Belfast

Our best KLM deals on Washington, D.C. Dulles Intl Airport to Belfast flight tickets
KLM
Apr 13
IAD6:10 pmWashington, D.C. Dulles Intl
10h 10m
1 stop
BHD9:20 amBelfast City
Apr 27
BHD9:50 amBelfast City
19h 52m
2 stops
IAD12:42 amWashington, D.C. Dulles Intl
$714
KLM
Apr 3
IAD5:40 pmWashington, D.C. Dulles Intl
18h 15m
1 stop
BHD4:55 pmBelfast City
Apr 7
BHD5:30 pmBelfast City
27h 05m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$796
KLM
Mar 16
IAD7:59 pmWashington, D.C. Dulles Intl
16h 41m
2 stops
BHD4:40 pmBelfast City
Mar 22
BHD5:20 pmBelfast City
27h 45m
1 stop
IAD5:05 pmWashington, D.C. Dulles Intl
$806

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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 February 28, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 4/14

8:30 pm-11:20 pm

3 stops21h 50m

Belfast Intl

Tue 4/21

11:30 pm-3:10 pm

3 stops44h 40m

$646

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 3/19

4:46 pm-10:20 am

2 stops13h 34m

Belfast City

Thu 3/26

6:35 am-8:55 pm

1 stop18h 20m

$650

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 4/14

8:30 pm-8:55 pm

2 stops19h 25m

Belfast Intl

Tue 4/21

6:15 am-7:20 pm

2 stops42h 05m

$664

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 4/30

10:25 pm-7:25 pm

1 stop16h 00m

Belfast City

Tue 5/12

9:40 am-5:25 pm

1 stop12h 45m

$668

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 3/19

7:05 pm-4:40 pm

1 stop17h 35m

Belfast City

Tue 3/24

5:20 pm-5:05 pm

1 stop27h 45m

$669

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 8/27

7:15 pm-3:30 pm

1 stop15h 15m

Belfast City

Mon 8/31

9:40 am-3:50 pm

1 stop11h 10m

$670

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 3/16

7:59 pm-4:40 pm

2 stops16h 41m

Belfast City

Tue 3/24

5:20 pm-5:05 pm

1 stop27h 45m

$674

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 4/13

8:30 pm-11:20 pm

3 stops21h 50m

Belfast Intl

Mon 4/27

8:55 am-3:10 pm

3 stops35h 15m

$678

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 4/13

6:10 pm-9:20 am

1 stop10h 10m

Belfast City

Mon 4/27

9:50 am-12:42 am

2 stops19h 52m

$714

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 8/27

5:40 pm-9:20 am

1 stop10h 40m

Belfast City

Mon 8/31

5:30 pm-3:35 pm

1 stop27h 05m

$733

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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. Dulles Intl Airport 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. Dulles Intl to Belfast?

British Airways is the most popular carrier operating from Washington, D.C. Dulles Intl to Belfast

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

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

Fastest flight time

10h 30m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Belfast takes 10h 30m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Belfast. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Belfast.
Search flight deals

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

    The straight-line distance from Washington, D.C. Dulles Intl to Belfast is 3387.7 mi. Flights usually cover this in 10h 30m, depending on flying conditions and air traffic around both airports.

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

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

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

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

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

    The travel and health documents you'll need for your trip to Belfast may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Belfast. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Washington, D.C. Dulles Intl Airport to Belfast

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Belfast with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $627Free CancellationRating
6.7
7,772 reviews
Search British Airways flights

Why use momondo?

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

It is quick and easy to find Washington, D.C. to Belfast flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Belfast that suits you.

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

Yes. momondo enables you to select and highlight flights to Belfast from Washington, D.C. with this policy.

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

Once you have performed a search for Washington, D.C. to Belfast flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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