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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from £238

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 28/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BHD
27 Jan — 3 Feb1
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 28 December 2025.

Tue 30/1221:45IAD - BHD
1 stop14h 00mBritish Airways
Mon 5/109:15BHD - IAD
1 stop15h 40mBritish Airways
Deal found 27/12£964
Tue 30/1221:00IAD - BHD
2 stops15h 25mMultiple Airlines
Mon 5/106:55BHD - IAD
2 stops18h 00mMultiple Airlines
Deal found 27/12£1,005
Sat 27/1217:05IAD - BHD
2 stops11h 45mBritish Airways
Wed 31/1211:25BHD - IAD
2 stops15h 25mBritish Airways
Deal found 27/12£1,113
Mon 29/1221:45IAD - BHD
1 stop13h 20mBritish Airways
Sat 3/109:15BHD - IAD
2 stops19h 49mBritish Airways
Deal found 27/12£1,254
Mon 29/1217:05IAD - BHD
2 stops14h 45mAer Lingus
Sat 3/106:55BHD - IAD
2 stops13h 40mAer Lingus
Deal found 27/12£1,407
Sat 27/1222:55IAD - BFS
2 stops17h 50mMultiple Airlines
Wed 31/1208:20BFS - IAD
2 stops16h 10mMultiple Airlines
Deal found 27/12£1,466
Mon 29/1218:05IAD - BHD
1 stop17h 45mVirgin Atlantic
Sat 3/106:30BHD - IAD
1 stop14h 35mVirgin Atlantic
Deal found 27/12£1,517
Mon 29/1209:45IAD - BHD
3 stops29h 45mMultiple Airlines
Sat 3/106:55BHD - IAD
2 stops13h 40mMultiple Airlines
Deal found 27/12£1,576

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 28 December 2025.

Round-trip from

£460

One-way from

£238
British Airways
  • British Airways
  • 23/1-30/1
  • 2 total stops
  • 27h 40m total
  • Washington, D.C. to Belfast
Search Deals
28/1
  • 28/1
  • 2 total stops
  • 18h 40m 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 28 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

Dulles Intl

Fly to

Belfast

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 28/1

18:20-09:10

1 stop9h 50m

Belfast City

Wed 4/2

12:25-19:55

1 stop12h 30m

£461

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 28/1

18:20-10:15

1 stop10h 55m

Belfast City

Wed 18/3

06:35-16:35

1 stop14h 00m

£461

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 29/1

18:20-10:20

1 stop11h 00m

Belfast City

Wed 4/2

12:25-19:55

1 stop12h 30m

£461

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 16/3

19:20-10:40

1 stop11h 20m

Belfast City

Sun 22/3

20:25-20:55

1 stop28h 30m

£461

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 17/3

22:45-14:50

1 stop12h 05m

Belfast City

Thu 26/3

06:35-16:35

1 stop14h 00m

£461

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

17:35-16:35

1 stop27h 00m

£478

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 28/1

13:08-10:15

2 stops16h 07m

Belfast City

Wed 18/3

11:25-23:59

2 stops16h 34m

£488

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

£498

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

£498

Flights are sorted by cheapest return flights first.

Deals found on 27/12

Showing 1-10 of 22 results
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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 £461, British Airways can have you in Belfast from Washington, D.C. Dulles Intl Airport in 9h 50m. The distance from Washington, D.C. Dulles Intl Airport to Belfast is about 3390 mi.

  • 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

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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

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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?

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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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