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Cheap flights from Washington, D.C. Dulles Intl Airport to Northern Ireland from £243

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BFS
26 Jul — 2 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Dulles Intl to Northern Ireland

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl to Northern Ireland
Explore the most affordable flight options available from Dulles Intl to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 June 2026.

Fri 2/1020:30
IAD
-
BFS
2 stops21h 50m
Multiple Airlines
Tue 13/1020:15
BFS
-
IAD
3 stops27h 45m
Multiple Airlines
Deal found 22/6£597
Thu 1/1020:30
IAD
-
BFS
2 stops20h 10m
Multiple Airlines
Thu 8/1021:10
BFS
-
IAD
2 stops26h 50m
Multiple Airlines
Deal found 25/6£601
Sun 6/1219:40
IAD
-
BFS
2 stops19h 50m
Multiple Airlines
Sun 13/1220:00
BFS
-
IAD
3 stops47h 45m
Multiple Airlines
Deal found 23/6£606
Sat 22/820:30
IAD
-
BFS
2 stops17h 25m
Multiple Airlines
Sun 30/807:10
BFS
-
IAD
3 stops37h 00m
Multiple Airlines
Deal found 22/6£611
Sun 25/1020:40
IAD
-
BFS
2 stops18h 20m
Multiple Airlines
Sun 15/1122:00
BFS
-
IAD
3 stops45h 45m
Multiple Airlines
Deal found 22/6£628
Sun 6/1219:40
IAD
-
BHD
2 stops18h 20m
Multiple Airlines
Sun 13/1219:45
BHD
-
IAD
3 stops48h 00m
Multiple Airlines
Deal found 23/6£631
Tue 14/720:30
IAD
-
BFS
3 stops21h 35m
Multiple Airlines
Wed 22/722:45
BFS
-
IAD
2 stops26h 39m
Multiple Airlines
Deal found 23/6£632
Sun 6/1221:45
IAD
-
BHD
1 stop14h 05m
British Airways
Sun 13/1206:30
BHD
-
IAD
1 stop14h 05m
British Airways
Deal found 23/6£691
Sun 25/1022:45
IAD
-
BHD
1 stop11h 10m
British Airways
Sun 15/1106:30
BHD
-
IAD
1 stop14h 05m
British Airways
Deal found 22/6£692
Fri 2/1020:30
IAD
-
BHD
2 stops19h 00m
Multiple Airlines
Tue 13/1007:00
BHD
-
IAD
2 stops17h 35m
Multiple Airlines
Deal found 22/6£704
Tue 4/823:20
IAD
-
BFS
2 stops18h 05m
Multiple Airlines
Tue 11/817:10
BFS
-
IAD
2 stops27h 00m
Multiple Airlines
Deal found 23/6£720
Fri 2/1022:25
IAD
-
BHD
1 stop12h 05m
British Airways
Tue 13/1009:40
BHD
-
IAD
1 stop11h 15m
British Airways
Deal found 22/6£729

Find flight deals from Dulles Intl to Northern Ireland

Keep the following information in mind while searching for Dulles Intl to Northern Ireland flight deals. Data was last updated 26 June 2026.

Round-trip from

£597

One-way from

£243
2/10-13/10
  • 2/10-13/10
  • 5 total stops
  • 49h 35m total
  • Washington, D.C. to Northern Ireland
Search Deals
12/9
  • 12/9
  • 2 total stops
  • 16h 05m total
  • Washington, D.C. to Northern Ireland
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Dulles Intl to Northern Ireland 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 26 June 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Northern Ireland 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

Fri 2/10

20:30-23:20

2 stops21h 50m

Belfast Intl

Tue 13/10

20:15-19:00

3 stops27h 45m

£597

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 1/10

20:30-21:40

2 stops20h 10m

Belfast Intl

Thu 8/10

21:10-19:00

2 stops26h 50m

£601

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 6/12

19:40-20:30

2 stops19h 50m

Belfast Intl

Sun 13/12

20:00-14:45

3 stops47h 45m

£606

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 22/8

20:30-18:55

2 stops17h 25m

Belfast Intl

Sun 30/8

07:10-15:10

3 stops37h 00m

£611

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 14/7

20:30-23:05

3 stops21h 35m

Belfast Intl

Wed 22/7

22:45-20:24

2 stops26h 39m

£632

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 20/9

22:25-14:35

1 stop11h 10m

Belfast City

Thu 24/9

06:30-17:25

1 stop15h 55m

£739

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 4/8

23:20-22:25

2 stops18h 05m

Belfast Intl

Tue 11/8

06:00-21:24

3 stops44h 24m

£746

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 9/7

17:15-18:55

2 stops20h 40m

Belfast Intl

Tue 21/7

22:45-15:24

2 stops21h 39m

£754

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Fri 11/9

18:26-16:55

2 stops17h 29m

Belfast City

Wed 16/9

17:30-15:35

1 stop27h 05m

£839

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sat 22/8

06:00-09:20

2 stops22h 20m

Belfast City

Sun 30/8

09:50-00:34

2 stops19h 44m

£851

Flights are sorted by cheapest return flights first.

Deals found on 23/6

Showing 1-10 of 19 resultsSorted by cheapest first
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Best time to book a flight from Dulles Intl to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland 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 Northern Ireland
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 Northern Ireland. 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 Northern Ireland?

    British Airways and KLM can get you from Washington, D.C. Dulles Intl Airport to Northern Ireland in just under 11h 10m. Your travel time can differ by up to 6h 19m. Airlines will cover a distance of 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 Northern Ireland that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Northern Ireland 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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Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Northern Ireland?

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

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

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