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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from £457

This is the cheapest return 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 2/2. 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
19:40 - 20:10
IAD
-
BFS
19h 30m2 stops
Multiple Airlines Logo
06:30 - 18:30
BFS
-
IAD
17h 00m2 stops
£457Multiple Airlines
Mon, 2 Feb - Mon, 9 Feb
British Airways Logo
18:20 - 10:20
IAD
-
BHD
11h 00m1 stop
British Airways Logo
09:05 - 16:35
BHD
-
IAD
11h 30m1 stop
£459British Airways
Thu, 5 Mar - Thu, 12 Mar
British Airways Logo
21:45 - 14:15
IAD
-
BHD
11h 30m1 stop
British Airways Logo
08:45 - 19:55
BHD
-
IAD
16h 10m1 stop
£460British Airways
Fri, 23 Jan - Fri, 30 Jan
British Airways Logo
22:25 - 17:30
IAD
-
BHD
14h 05m1 stop
British Airways Logo
06:40 - 17:25
BHD
-
IAD
15h 45m1 stop
£472British Airways
Mon, 27 Apr - Mon, 4 May
British Airways Logo
18:20 - 10:15
IAD
-
BHD
10h 55m1 stop
British Airways Logo
06:30 - 15:35
BHD
-
IAD
14h 05m1 stop
£477British Airways
Wed, 4 Mar - Sun, 8 Mar
British Airways Logo
21:45 - 14:15
IAD
-
BHD
11h 30m1 stop
British Airways Logo
09:10 - 16:35
BHD
-
IAD
11h 25m1 stop
£477British Airways
Wed, 4 Mar - Sun, 8 Mar
Delta Logo
12:24 - 16:50
IAD
-
BHD
23h 26m2 stops
Delta Logo
06:30 - 17:05
BHD
-
IAD
14h 35m1 stop
£497Delta
Thu, 5 Mar - Thu, 12 Mar
Delta Logo
12:23 - 16:50
IAD
-
BHD
23h 27m2 stops
Delta Logo
17:20 - 16:05
BHD
-
IAD
27h 45m1 stop
£497Delta
Fri, 23 Jan - Fri, 30 Jan
Delta Logo
12:24 - 16:50
IAD
-
BHD
23h 26m2 stops
Delta Logo
06:30 - 22:59
BHD
-
IAD
20h 29m2 stops
£504Delta
Thu, 5 Mar - Thu, 12 Mar
Multiple Airlines Logo
19:40 - 22:45
IAD
-
BFS
22h 05m3 stops
Multiple Airlines Logo
06:00 - 15:15
BFS
-
IAD
38h 15m3 stops
£509Multiple Airlines
Fri, 23 Jan - Fri, 30 Jan

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
5 Mar
IAD18:20Washington, D.C. Dulles Intl
11h 00m
1 stop
BHD10:20Belfast City
12 Mar
BHD09:05Belfast City
11h 30m
1 stop
IAD16:35Washington, D.C. Dulles Intl
£459
Find similar
British Airways
23 Jan
IAD21:45Washington, D.C. Dulles Intl
11h 30m
1 stop
BHD14:15Belfast City
30 Jan
BHD08:45Belfast City
16h 10m
1 stop
IAD19:55Washington, D.C. Dulles Intl
£460
Find similar
British Airways
27 Apr
IAD22:25Washington, D.C. Dulles Intl
14h 05m
1 stop
BHD17:30Belfast City
4 May
BHD06:40Belfast City
15h 45m
1 stop
IAD17:25Washington, D.C. Dulles Intl
£472
Find similar

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
5 Mar
IAD12:24Washington, D.C. Dulles Intl
23h 26m
2 stops
BHD16:50Belfast City
12 Mar
BHD06:30Belfast City
14h 35m
1 stop
IAD17:05Washington, D.C. Dulles Intl
£497
Find similar
Delta
23 Jan
IAD12:23Washington, D.C. Dulles Intl
23h 27m
2 stops
BHD16:50Belfast City
30 Jan
BHD17:20Belfast City
27h 45m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£497
Find similar
Delta
5 Mar
IAD12:24Washington, D.C. Dulles Intl
23h 26m
2 stops
BHD16:50Belfast City
12 Mar
BHD06:30Belfast City
20h 29m
2 stops
IAD22:59Washington, D.C. Dulles Intl
£504
Find similar

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 26 December 2025.
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

Mon 2/2

19:40-20:10

2 stops19h 30m

Belfast Intl

Mon 9/2

06:30-18:30

2 stops17h 00m

£457

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 5/3

18:20-10:20

1 stop11h 00m

Belfast City

Thu 12/3

09:05-16:35

1 stop11h 30m

£459

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Fri 23/1

21:45-14:15

1 stop11h 30m

Belfast City

Fri 30/1

08:45-19:55

1 stop16h 10m

£460

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 27/4

22:25-17:30

1 stop14h 05m

Belfast City

Mon 4/5

06:40-17:25

1 stop15h 45m

£472

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 4/3

18:20-10:15

1 stop10h 55m

Belfast City

Sun 8/3

06:30-15:35

1 stop14h 05m

£477

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 4/3

21:45-14:15

1 stop11h 30m

Belfast City

Sun 8/3

09:10-16:35

1 stop11h 25m

£477

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 5/3

12:24-16:50

2 stops23h 26m

Belfast City

Thu 12/3

06:30-17:05

1 stop14h 35m

£497

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Fri 23/1

12:23-16:50

2 stops23h 27m

Belfast City

Fri 30/1

17:20-16:05

1 stop27h 45m

£497

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 5/3

12:24-16:50

2 stops23h 26m

Belfast City

Thu 12/3

06:30-22:59

2 stops20h 29m

£504

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 23/1

19:40-22:45

3 stops22h 05m

Belfast Intl

Fri 30/1

06:00-15:15

3 stops38h 15m

£509

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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 00m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Belfast takes 11h 00m
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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  • 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 11h 00m.

  • 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.

  • How do I get Price Alerts for flights from Washington, D.C. Dulles Intl Airport to Belfast?

    Search flight deals from Washington, D.C. Dulles Intl Airport to Belfast. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from Washington, D.C. Dulles Intl Airport to Belfast with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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