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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from £206

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BHD
2 Aug — 9 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Dulles Intl to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl to Belfast
Explore the most affordable flight options available from Dulles Intl to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 July 2026.

Wed 26/820:30
IAD
-
BFS
3 stops21h 45m
Multiple Airlines
Mon 31/808:40
BFS
-
IAD
3 stops35h 30m
Multiple Airlines
Deal found 28/6£590
Wed 12/809:45
IAD
-
BFS
3 stops28h 30m
Multiple Airlines
Wed 19/820:15
BFS
-
IAD
3 stops47h 55m
Multiple Airlines
Deal found 28/6£636
Wed 16/920:30
IAD
-
BFS
2 stops15h 35m
Multiple Airlines
Tue 29/914:50
BFS
-
IAD
2 stops33h 35m
Multiple Airlines
Deal found 29/6£643
Sun 19/720:30
IAD
-
BFS
3 stops21h 40m
Multiple Airlines
Wed 22/722:45
BFS
-
IAD
3 stops27h 28m
Multiple Airlines
Deal found 29/6£660
Sun 16/817:40
IAD
-
BFS
2 stops23h 10m
Multiple Airlines
Sun 30/822:10
BFS
-
IAD
3 stops46h 00m
Multiple Airlines
Deal found 29/6£664
Thu 29/1020:40
IAD
-
BFS
2 stops18h 30m
Multiple Airlines
Sun 8/1107:45
BFS
-
IAD
3 stops36h 30m
Multiple Airlines
Deal found 29/6£682
Wed 12/822:35
IAD
-
BFS
2 stops17h 30m
Multiple Airlines
Mon 24/820:15
BFS
-
IAD
3 stops47h 55m
Multiple Airlines
Deal found 30/6£683
Wed 12/816:20
IAD
-
BHD
2 stops16h 00m
Multiple Airlines
Mon 24/806:50
BHD
-
IAD
3 stops37h 20m
Multiple Airlines
Deal found 30/6£694
Wed 26/816:20
IAD
-
BHD
2 stops14h 30m
Multiple Airlines
Mon 31/807:00
BHD
-
IAD
2 stops17h 25m
Multiple Airlines
Deal found 28/6£704
Thu 29/1022:45
IAD
-
BHD
1 stop11h 15m
British Airways
Sun 8/1109:10
BHD
-
IAD
1 stop11h 25m
British Airways
Deal found 29/6£720
Wed 16/908:28
IAD
-
BHD
2 stops25h 02m
Multiple Airlines
Tue 29/907:00
BHD
-
IAD
2 stops17h 35m
Multiple Airlines
Deal found 29/6£722
Mon 28/922:25
IAD
-
BHD
1 stop14h 05m
British Airways
Fri 2/1012:00
BHD
-
IAD
1 stop13h 20m
British Airways
Deal found 29/6£730

Find flight deals from Dulles Intl to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Belfast (BF1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 3 July 2026.

Round-trip from

£590

One-way from

£206
26/8-31/8
  • 26/8-31/8
  • 6 total stops
  • 57h 15m total
  • Washington, D.C. to Belfast
Search Deals
17/7
  • 17/7
  • 3 total stops
  • 51h 10m total
  • Washington, D.C. to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Dulles Intl 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, Cheapflights users made 858,174 searches. Data last updated 3 July 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 26/8

20:30-23:15

3 stops21h 45m

Belfast Intl

Mon 31/8

08:40-15:10

3 stops35h 30m

£590

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 12/8

09:45-19:15

3 stops28h 30m

Belfast Intl

Wed 19/8

20:15-15:10

3 stops47h 55m

£636

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 16/8

16:20-18:25

2 stops21h 05m

Belfast Intl

Sun 30/8

22:10-15:10

3 stops46h 00m

£663

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 16/9

20:30-17:05

2 stops15h 35m

Belfast Intl

Tue 29/9

18:20-22:15

3 stops32h 55m

£668

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 29/10

20:40-19:10

2 stops18h 30m

Belfast Intl

Sun 8/11

07:45-15:15

3 stops36h 30m

£682

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 16/8

22:35-21:50

2 stops18h 15m

Belfast Intl

Sat 22/8

07:40-19:20

3 stops40h 40m

£728

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 28/9

22:25-17:30

1 stop14h 05m

Belfast City

Fri 2/10

12:00-20:20

1 stop13h 20m

£731

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 3/9

17:15-18:55

2 stops20h 40m

Belfast Intl

Mon 7/9

06:30-15:45

2 stops14h 15m

£755
Fastest return journey

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 16/9

12:25-09:20

2 stops15h 55m

Belfast City

Tue 29/9

09:50-15:35

1 stop10h 45m

£758

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 26/8

22:25-15:40

1 stop12h 15m

Belfast City

Mon 31/8

19:35-20:20

1 stop29h 45m

£773

Flights are sorted by cheapest return flights first.

Deals found on 29/6

Showing 1-10 of 24 resultsSorted by cheapest first
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Best time to book a flight from Dulles Intl to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Dulles Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Belfast
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Belfast. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Belfast?

    For as low as £731, British Airways can have you in Belfast from Washington, D.C. Dulles Intl Airport in 14h 05m. The distance from Washington, D.C. Dulles Intl Airport to Belfast is about 3390 mi. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Dulles Intl to Belfast that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Belfast.

  • Can I find deals for business class flights from Dulles Intl to Belfast?

    Yes. Cheapflights offers flight deals from Dulles Intl to Belfast by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

Complete your trip to Belfast by adding a car hire and/or hotel booking to your travel itinerary.
Belfast car hire
Belfast Intl Airport car hire
Londonderry Eglinton Airport car hire
Isle of Islay Glenegedale Airport car hire
Londonderry car hire

Fly with Cheapflights

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How does Cheapflights help users find flights from Dulles Intl to Belfast?

Deals for Dulles Intl to Belfast flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Belfast?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Dulles Intl to Belfast.

Can Cheapflights find flights from Dulles Intl to Belfast with no change fees?

Need flexible booking options for your flight to Belfast from Dulles Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Dulles Intl to Belfast become cheaper?

Not ready to book yet? You can track prices for flights from Dulles Intl to Belfast on Cheapflights with our Price Alert feature and get notified when better prices are available.

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