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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from £312

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 7/3. 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 - 15:15
IAD
-
BFS
13h 45m
2 stops
Multiple Airlines Logo
07:30 - 19:20
BFS
-
IAD
16h 50m
2 stops
£469Multiple Airlines
Tue, 7 Apr - Wed, 15 Apr
British Airways Logo
19:20 - 10:40
IAD
-
BHD
11h 20m
1 stop
British Airways Logo
19:35 - 17:15
BHD
-
IAD
26h 40m
1 stop
£475British Airways
Mon, 23 Mar - Mon, 30 Mar
British Airways Logo
19:20 - 10:30
IAD
-
BHD
11h 10m
1 stop
British Airways Logo
20:25 - 17:25
BHD
-
IAD
26h 00m
1 stop
£479British Airways
Tue, 24 Mar - Tue, 31 Mar
Multiple Airlines Logo
20:30 - 19:40
IAD
-
BFS
18h 10m
2 stops
Multiple Airlines Logo
08:30 - 15:10
BFS
-
IAD
35h 40m
3 stops
£483Multiple Airlines
Tue, 7 Apr - Wed, 15 Apr
British Airways Logo
17:40 - 09:00
IAD
-
BHD
10h 20m
1 stop
British Airways Logo
20:35 - 15:50
BHD
-
IAD
24h 15m
1 stop
£487British Airways
Tue, 7 Apr - Wed, 15 Apr
Multiple Airlines Logo
20:30 - 20:40
IAD
-
BFS
19h 10m
2 stops
Multiple Airlines Logo
09:10 - 15:10
BFS
-
IAD
35h 00m
2 stops
£487Multiple Airlines
Mon, 6 Apr - Mon, 13 Apr
British Airways Logo
22:45 - 16:40
IAD
-
BHD
13h 55m
1 stop
British Airways Logo
10:40 - 20:55
BHD
-
IAD
14h 15m
1 stop
£494British Airways
Thu, 19 Mar - Thu, 26 Mar
Delta Logo
13:19 - 16:45
IAD
-
BHD
23h 26m
2 stops
Delta Logo
09:50 - 15:35
BHD
-
IAD
10h 45m
1 stop
£498Delta
Mon, 23 Mar - Mon, 30 Mar
Delta Logo
13:19 - 16:45
IAD
-
BHD
23h 26m
2 stops
Delta Logo
09:50 - 20:46
BHD
-
IAD
15h 56m
2 stops
£506Delta
Mon, 23 Mar - Mon, 30 Mar
Scandinavian Airlines Logo
19:05 - 16:40
IAD
-
BHD
17h 35m
1 stop
Scandinavian Airlines Logo
17:20 - 19:19
BHD
-
IAD
29h 59m
2 stops
£542Scandinavian Airlines
Thu, 19 Mar - Thu, 26 Mar

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
23 Mar
IAD19:20Washington, D.C. Dulles Intl
11h 20m
1 stop
BHD10:40Belfast City
30 Mar
BHD19:35Belfast City
26h 40m
1 stop
IAD17:15Washington, D.C. Dulles Intl
£475
British Airways
24 Mar
IAD19:20Washington, D.C. Dulles Intl
11h 10m
1 stop
BHD10:30Belfast City
31 Mar
BHD20:25Belfast City
26h 00m
1 stop
IAD17:25Washington, D.C. Dulles Intl
£479
British Airways
7 Apr
IAD17:40Washington, D.C. Dulles Intl
10h 20m
1 stop
BHD09:00Belfast City
15 Apr
BHD20:35Belfast City
24h 15m
1 stop
IAD15:50Washington, D.C. Dulles Intl
£487

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

Our best Aer Lingus deals on Washington, D.C. Dulles Intl Airport to Belfast flight tickets
Aer Lingus
24 Mar
IAD18:05Washington, D.C. Dulles Intl
14h 10m
2 stops
BHD12:15Belfast City
31 Mar
BHD07:00Belfast City
17h 35m
2 stops
IAD19:35Washington, D.C. Dulles Intl
£627
Aer Lingus
16 Mar
IAD18:05Washington, D.C. Dulles Intl
14h 10m
2 stops
BHD12:15Belfast City
22 Mar
BHD18:50Belfast City
29h 40m
2 stops
IAD20:30Washington, D.C. Dulles Intl
£629
Aer Lingus
19 Mar
IAD18:05Washington, D.C. Dulles Intl
16h 20m
2 stops
BHD14:25Belfast City
26 Mar
BHD10:35Belfast City
13h 55m
2 stops
IAD20:30Washington, D.C. Dulles Intl
£630

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 24 February 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 7/4

20:30-15:15

2 stops13h 45m

Belfast Intl

Wed 15/4

07:30-19:20

2 stops16h 50m

£469

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 23/3

19:20-10:40

1 stop11h 20m

Belfast City

Mon 30/3

19:35-17:15

1 stop26h 40m

£475

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 24/3

19:20-10:30

1 stop11h 10m

Belfast City

Tue 31/3

20:25-17:25

1 stop26h 00m

£479

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 7/4

20:30-19:40

2 stops18h 10m

Belfast Intl

Wed 15/4

08:30-15:10

3 stops35h 40m

£483

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 7/4

17:40-09:00

1 stop10h 20m

Belfast City

Wed 15/4

20:35-15:50

1 stop24h 15m

£487

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 6/4

20:30-20:40

2 stops19h 10m

Belfast Intl

Mon 13/4

09:10-15:10

2 stops35h 00m

£487

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 19/3

22:45-16:40

1 stop13h 55m

Belfast City

Thu 26/3

10:40-20:55

1 stop14h 15m

£494

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 23/3

13:19-16:45

2 stops23h 26m

Belfast City

Mon 30/3

09:50-15:35

1 stop10h 45m

£498

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 23/3

13:19-16:45

2 stops23h 26m

Belfast City

Mon 30/3

09:50-20:46

2 stops15h 56m

£506

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 19/3

19:05-16:40

1 stop17h 35m

Belfast City

Thu 26/3

17:20-19:19

2 stops29h 59m

£542

Flights are sorted by cheapest return flights first.

Showing 1-10 of 17 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, Delta, 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 20m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Belfast takes 10h 20m
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?

    Washington, D.C. Dulles Intl and Belfast are 3387.7 mi apart from one another. By plane, this route typically takes 10h 20m.

  • 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