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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from $366

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 9/13. 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
9:55 am - 9:00 pm
IAD
-
BFS
30h 05m
2 stops
Multiple Airlines Logo
8:30 am - 3:10 pm
BFS
-
IAD
35h 40m
3 stops
$799Multiple Airlines
Sun, May 31 - Wed, Jun 10
Multiple Airlines Logo
9:55 am - 9:00 pm
IAD
-
BFS
30h 05m
2 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$825Multiple Airlines
Sun, May 31 - Wed, Jun 10
Multiple Airlines Logo
8:25 am - 9:00 pm
IAD
-
BFS
31h 35m
2 stops
Multiple Airlines Logo
8:15 pm - 3:10 pm
BFS
-
IAD
47h 55m
3 stops
$836Multiple Airlines
Sun, May 31 - Wed, Jun 10
Multiple Airlines Logo
8:30 pm - 9:30 pm
IAD
-
BFS
20h 00m
2 stops
Multiple Airlines Logo
8:20 pm - 3:10 pm
BFS
-
IAD
47h 50m
3 stops
$859Multiple Airlines
Sun, Jun 7 - Sun, Jun 14
Multiple Airlines Logo
4:05 pm - 3:55 pm
IAD
-
BFS
18h 50m
2 stops
Multiple Airlines Logo
9:25 pm - 3:10 pm
BFS
-
IAD
46h 45m
3 stops
$880Multiple Airlines
Wed, May 27 - Mon, Jun 1
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, Aug 3 - Thu, Aug 20
British Airways Logo
9:30 pm - 1:35 pm
IAD
-
BHD
11h 05m
1 stop
British Airways Logo
11:35 am - 7:40 pm
BHD
-
IAD
13h 05m
1 stop
$985British Airways
Wed, Aug 19 - Wed, Aug 26
KLM Logo
5:40 pm - 9:20 am
IAD
-
BHD
10h 40m
1 stop
KLM Logo
5:30 pm - 3:35 pm
BHD
-
IAD
27h 05m
1 stop
$999KLM
Sun, Sep 13 - Tue, Sep 15
Delta Logo
6:10 pm - 4:55 pm
IAD
-
BHD
17h 45m
1 stop
Delta Logo
5:30 pm - 4:25 pm
BHD
-
IAD
27h 55m
2 stops
$1,022Delta
Mon, Aug 3 - Thu, Aug 20
Delta Logo
12:29 pm - 9:20 am
IAD
-
BHD
15h 51m
2 stops
Delta Logo
5:30 pm - 4:25 pm
BHD
-
IAD
27h 55m
2 stops
$1,027Delta
Wed, Aug 5 - Wed, Aug 19

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
Aug 3
IAD7:15 pmWashington, D.C. Dulles Intl
12h 40m
1 stop
BHD12:55 pmBelfast City
Aug 19
BHD6:20 pmBelfast City
28h 05m
1 stop
IAD5:25 pmWashington, D.C. Dulles Intl
$979
British Airways
Aug 19
IAD9:30 pmWashington, D.C. Dulles Intl
11h 05m
1 stop
BHD1:35 pmBelfast City
Aug 26
BHD11:35 amBelfast City
13h 05m
1 stop
IAD7:40 pmWashington, D.C. Dulles Intl
$985
British Airways
Aug 2
IAD7:15 pmWashington, D.C. Dulles Intl
20h 20m
1 stop
BHD8:35 pmBelfast City
Aug 20
BHD6:30 amBelfast City
15h 55m
1 stop
IAD5:25 pmWashington, D.C. Dulles Intl
$990

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

Our best Virgin Atlantic deals on Washington, D.C. Dulles Intl Airport to Belfast flight tickets
Virgin Atlantic
Apr 27
IAD6:10 pmWashington, D.C. Dulles Intl
10h 10m
1 stop
BHD9:20 amBelfast City
May 11
BHD5:30 pmBelfast City
27h 05m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,059
Virgin Atlantic
Aug 5
IAD10:21 amWashington, D.C. Dulles Intl
17h 59m
2 stops
BHD9:20 amBelfast City
Aug 19
BHD9:50 amBelfast City
10h 45m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,068

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 April 25, 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

Cheapest round-trip

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 5/31

9:55 am-9:00 pm

2 stops30h 05m

Belfast Intl

Wed 6/10

8:30 am-3:10 pm

3 stops35h 40m

$799

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 5/31

9:55 am-9:00 pm

2 stops30h 05m

Belfast Intl

Wed 6/10

8:15 pm-3:10 pm

3 stops47h 55m

$825

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 5/31

8:25 am-9:00 pm

2 stops31h 35m

Belfast Intl

Wed 6/10

8:15 pm-3:10 pm

3 stops47h 55m

$836

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 6/7

8:30 pm-9:30 pm

2 stops20h 00m

Belfast Intl

Sun 6/14

8:20 pm-3:10 pm

3 stops47h 50m

$859

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 5/27

4:05 pm-3:55 pm

2 stops18h 50m

Belfast Intl

Mon 6/1

9:25 pm-3:10 pm

3 stops46h 45m

$880

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 8/3

7:15 pm-12:55 pm

1 stop12h 40m

Belfast City

Thu 8/20

6:30 am-5:25 pm

1 stop15h 55m

$979
Quickest round-trip

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 8/19

9:30 pm-1:35 pm

1 stop11h 05m

Belfast City

Wed 8/26

11:35 am-7:40 pm

1 stop13h 05m

$985

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 9/13

5:40 pm-9:20 am

1 stop10h 40m

Belfast City

Tue 9/15

5:30 pm-3:35 pm

1 stop27h 05m

$999

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 8/3

6:10 pm-4:55 pm

1 stop17h 45m

Belfast City

Thu 8/20

5:30 pm-4:25 pm

2 stops27h 55m

$1,022

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 8/5

12:29 pm-9:20 am

2 stops15h 51m

Belfast City

Wed 8/19

5:30 pm-4:25 pm

2 stops27h 55m

$1,027

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. 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?

Aer Lingus and British Airways are the most popular carriers 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

11h 05m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Belfast takes 11h 05m
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

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

  • 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 11h 05m, 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 $652Free CancellationRating
6.7
7,912 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