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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from £271

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 13/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Belfast

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
20:30 - 22:15
IAD
-
BFS
20h 45m
2 stops
Multiple Airlines Logo
08:40 - 15:10
BFS
-
IAD
35h 30m
3 stops
£611Multiple Airlines
Mon, 24 Aug - Mon, 31 Aug
Multiple Airlines Logo
20:30 - 23:20
IAD
-
BFS
21h 50m
3 stops
Multiple Airlines Logo
08:40 - 15:10
BFS
-
IAD
35h 30m
3 stops
£617Multiple Airlines
Mon, 24 Aug - Mon, 31 Aug
Multiple Airlines Logo
08:25 - 21:00
IAD
-
BFS
31h 35m
2 stops
Multiple Airlines Logo
20:15 - 15:10
BFS
-
IAD
47h 55m
3 stops
£619Multiple Airlines
Sun, 31 May - Wed, 10 Jun
Multiple Airlines Logo
09:55 - 21:00
IAD
-
BFS
30h 05m
2 stops
Multiple Airlines Logo
20:15 - 15:10
BFS
-
IAD
47h 55m
3 stops
£627Multiple Airlines
Sun, 31 May - Wed, 10 Jun
British Airways Logo
19:15 - 12:55
IAD
-
BHD
12h 40m
1 stop
British Airways Logo
11:35 - 20:20
BHD
-
IAD
13h 45m
1 stop
£707British Airways
Mon, 14 Sep - Wed, 23 Sep
British Airways Logo
19:15 - 12:55
IAD
-
BHD
12h 40m
1 stop
British Airways Logo
19:35 - 19:40
BHD
-
IAD
29h 05m
1 stop
£721British Airways
Mon, 24 Aug - Mon, 31 Aug
Virgin Atlantic Logo
18:10 - 09:20
IAD
-
BHD
10h 10m
1 stop
Virgin Atlantic Logo
09:50 - 00:10
BHD
-
IAD
19h 20m
2 stops
£746Virgin Atlantic
Mon, 14 Sep - Wed, 23 Sep
KLM Logo
17:40 - 16:55
IAD
-
BHD
18h 15m
1 stop
KLM Logo
17:30 - 15:35
BHD
-
IAD
27h 05m
1 stop
£776KLM
Thu, 1 Oct - Mon, 12 Oct
KLM Logo
12:30 - 09:20
IAD
-
BHD
15h 50m
2 stops
KLM Logo
17:30 - 15:35
BHD
-
IAD
27h 05m
1 stop
£779KLM
Thu, 1 Oct - Mon, 12 Oct
Virgin Atlantic Logo
18:10 - 16:55
IAD
-
BHD
17h 45m
1 stop
Virgin Atlantic Logo
09:50 - 00:10
BHD
-
IAD
19h 20m
2 stops
£788Virgin Atlantic
Mon, 24 Aug - Mon, 31 Aug

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

Our best Delta deals on Washington, D.C. Dulles Intl Airport to Belfast flight tickets
Delta
7 Jun
IAD11:05Washington, D.C. Dulles Intl
24h 50m
2 stops
BHD16:55Belfast City
16 Jun
BHD09:50Belfast City
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£895
Delta
7 Jun
IAD11:05Washington, D.C. Dulles Intl
24h 50m
2 stops
BHD16:55Belfast City
18 Jun
BHD17:30Belfast City
30h 02m
2 stops
IAD18:32Washington, D.C. Dulles Intl
£901
Delta
9 Jun
IAD17:40Washington, D.C. Dulles Intl
10h 40m
1 stop
BHD09:20Belfast City
14 Jun
BHD09:50Belfast City
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£935

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
13 May
IAD18:10Washington, D.C. Dulles Intl
17h 45m
1 stop
BHD16:55Belfast City
17 May
BHD09:50Belfast City
20h 01m
2 stops
IAD00:51Washington, D.C. Dulles Intl
£875
KLM
9 Jun
IAD17:40Washington, D.C. Dulles Intl
10h 40m
1 stop
BHD09:20Belfast City
16 Jun
BHD09:50Belfast City
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£891

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 28 April 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 return flight

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 24/8

20:30-22:15

2 stops20h 45m

Belfast Intl

Mon 31/8

08:40-15:10

3 stops35h 30m

£611

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 24/8

20:30-23:20

3 stops21h 50m

Belfast Intl

Mon 31/8

08:40-15:10

3 stops35h 30m

£617

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 31/5

08:25-21:00

2 stops31h 35m

Belfast Intl

Wed 10/6

20:15-15:10

3 stops47h 55m

£619

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 31/5

09:55-21:00

2 stops30h 05m

Belfast Intl

Wed 10/6

20:15-15:10

3 stops47h 55m

£627
Fastest return journey

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 14/9

19:15-12:55

1 stop12h 40m

Belfast City

Wed 23/9

11:35-20:20

1 stop13h 45m

£707

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 24/8

19:15-12:55

1 stop12h 40m

Belfast City

Mon 31/8

19:35-19:40

1 stop29h 05m

£721

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 14/9

18:10-09:20

1 stop10h 10m

Belfast City

Wed 23/9

09:50-00:10

2 stops19h 20m

£746

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 1/10

17:40-16:55

1 stop18h 15m

Belfast City

Mon 12/10

17:30-15:35

1 stop27h 05m

£776

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 1/10

12:30-09:20

2 stops15h 50m

Belfast City

Mon 12/10

17:30-15:35

1 stop27h 05m

£779

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 24/8

18:10-16:55

1 stop17h 45m

Belfast City

Mon 31/8

09:50-00:10

2 stops19h 20m

£788

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. 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?

American Airlines 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

10h 40m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Belfast takes 10h 40m
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.
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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?

    Washington, D.C. Dulles Intl and Belfast are 3387.7 mi apart from one another. By plane, this route typically takes 10h 40m.

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

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. 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?

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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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