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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from £353

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 25/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags
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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
19:40 - 20:45
IAD
-
BFS
20h 05m
3 stops
Multiple Airlines Logo
07:55 - 15:15
BFS
-
IAD
36h 20m
3 stops
£580Multiple Airlines
Wed, 4 Nov - Wed, 18 Nov
Multiple Airlines Logo
19:40 - 21:50
IAD
-
BFS
21h 10m
2 stops
Multiple Airlines Logo
22:00 - 14:45
BFS
-
IAD
45h 45m
3 stops
£583Multiple Airlines
Tue, 24 Nov - Sun, 29 Nov
Multiple Airlines Logo
19:40 - 19:45
IAD
-
BFS
19h 05m
2 stops
Multiple Airlines Logo
07:55 - 15:15
BFS
-
IAD
36h 20m
3 stops
£598Multiple Airlines
Wed, 4 Nov - Wed, 18 Nov
Multiple Airlines Logo
17:25 - 21:30
IAD
-
BFS
23h 05m
3 stops
Multiple Airlines Logo
22:00 - 14:45
BFS
-
IAD
45h 45m
3 stops
£644Multiple Airlines
Tue, 24 Nov - Sun, 29 Nov
Multiple Airlines Logo
19:40 - 20:30
IAD
-
BHD
19h 50m
2 stops
Multiple Airlines Logo
07:00 - 15:15
BHD
-
IAD
37h 15m
3 stops
£652Multiple Airlines
Tue, 24 Nov - Sun, 29 Nov
Multiple Airlines Logo
20:30 - 18:40
IAD
-
BHD
17h 10m
2 stops
Multiple Airlines Logo
07:00 - 22:15
BHD
-
IAD
20h 15m
2 stops
£657Multiple Airlines
Thu, 1 Oct - Wed, 7 Oct
Multiple Airlines Logo
23:20 - 21:45
IAD
-
BFS
17h 25m
2 stops
Multiple Airlines Logo
22:45 - 20:24
BFS
-
IAD
26h 39m
2 stops
£665Multiple Airlines
Wed, 29 Jul - Wed, 5 Aug
Multiple Airlines Logo
19:40 - 20:30
IAD
-
BHD
19h 50m
3 stops
Multiple Airlines Logo
11:05 - 15:15
BHD
-
IAD
33h 10m
3 stops
£678Multiple Airlines
Tue, 24 Nov - Sun, 29 Nov
British Airways Logo
21:45 - 14:15
IAD
-
BHD
11h 30m
1 stop
British Airways Logo
12:25 - 19:55
BHD
-
IAD
12h 30m
1 stop
£692British Airways
Wed, 4 Nov - Wed, 18 Nov
British Airways Logo
21:45 - 16:45
IAD
-
BHD
14h 00m
1 stop
British Airways Logo
20:25 - 15:35
BHD
-
IAD
24h 10m
1 stop
£693British Airways
Tue, 24 Nov - Sun, 29 Nov

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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
4 Nov
IAD21:45Washington, D.C. Dulles Intl
11h 30m
1 stop
BHD14:15Belfast City
18 Nov
BHD12:25Belfast City
12h 30m
1 stop
IAD19:55Washington, D.C. Dulles Intl
£692
British Airways
24 Nov
IAD21:45Washington, D.C. Dulles Intl
14h 00m
1 stop
BHD16:45Belfast City
29 Nov
BHD20:25Belfast City
24h 10m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£693
British Airways
9 Aug
IAD22:25Washington, D.C. Dulles Intl
14h 15m
1 stop
BHD17:40Belfast City
24 Aug
BHD19:35Belfast City
25h 20m
1 stop
IAD15:55Washington, D.C. Dulles Intl
£724

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
2 Nov
IAD18:20Washington, D.C. Dulles Intl
9h 50m
1 stop
BHD09:10Belfast City
16 Nov
BHD17:20Belfast City
27h 25m
1 stop
IAD15:45Washington, D.C. Dulles Intl
£751
Delta
10 Aug
IAD18:10Washington, D.C. Dulles Intl
10h 10m
1 stop
BHD09:20Belfast City
20 Aug
BHD09:50Belfast City
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£762
Delta
9 Aug
IAD11:10Washington, D.C. Dulles Intl
24h 45m
2 stops
BHD16:55Belfast City
24 Aug
BHD17:30Belfast City
28h 08m
2 stops
IAD16:38Washington, D.C. Dulles Intl
£767

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 18 June 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

Wed 4/11

19:40-20:45

3 stops20h 05m

Belfast Intl

Wed 18/11

07:55-15:15

3 stops36h 20m

£580

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 24/11

19:40-21:50

2 stops21h 10m

Belfast Intl

Sun 29/11

22:00-14:45

3 stops45h 45m

£583

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 4/11

19:40-19:45

2 stops19h 05m

Belfast Intl

Wed 18/11

07:55-15:15

3 stops36h 20m

£598

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 24/11

17:25-21:30

3 stops23h 05m

Belfast Intl

Sun 29/11

22:00-14:45

3 stops45h 45m

£644

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 24/11

19:40-20:30

2 stops19h 50m

Belfast City

Sun 29/11

07:00-15:15

3 stops37h 15m

£652

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 1/10

20:30-18:40

2 stops17h 10m

Belfast City

Wed 7/10

07:00-22:15

2 stops20h 15m

£657

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 29/7

23:20-21:45

2 stops17h 25m

Belfast Intl

Wed 5/8

22:45-20:24

2 stops26h 39m

£665

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 24/11

19:40-20:30

3 stops19h 50m

Belfast City

Sun 29/11

11:05-15:15

3 stops33h 10m

£678
Fastest return journey

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 4/11

21:45-14:15

1 stop11h 30m

Belfast City

Wed 18/11

12:25-19:55

1 stop12h 30m

£692

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 24/11

21:45-16:45

1 stop14h 00m

Belfast City

Sun 29/11

20:25-15:35

1 stop24h 10m

£693

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
1
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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?

KLM, Delta, and Aer Lingus 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

12h 15m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Belfast takes 12h 15m
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?

    Washington, D.C. Dulles Intl and Belfast are 3387.7 mi apart from one another. By plane, this route typically takes 12h 15m.

  • 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