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Cheap flights from Washington, D.C. Dulles Intl Airport to Northern Ireland from £250

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BFS
11 Sep — 18 Sep1
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 12 August 2026.

Tue 22/920:30 -
2 stops18h 10m
Tue 29/917:10 -
3 stops34h 05m
Deal found 11/8£575
Sun 11/1023:20 -
2 stops16h 40m
Sat 17/1020:15 -
3 stops47h 55m
Deal found 11/8£612
Wed 23/917:45 -
2 stops20h 55m
Wed 30/908:15 -
2 stops35h 55m
Deal found 11/8£632
Sun 6/920:30 -
2 stops18h 45m
Sun 13/921:40 -
3 stops36h 40m
Deal found 7/8£646
Sun 6/920:30 -
2 stops18h 45m
Sat 12/920:15 -
3 stops47h 00m
Deal found 7/8£658
Sun 6/920:30 -
2 stops19h 00m
Sun 13/907:00 -
3 stops37h 10m
Deal found 7/8£673
Wed 18/1121:55 -
1 stop11h 20m
Mon 23/1109:25 -
1 stop11h 15m
Deal found 9/8£706
Wed 18/1121:55 -
1 stop11h 40m
Mon 23/1107:20 -
2 stops16h 10m
Deal found 9/8£716
Sun 22/1121:45 -
1 stop11h 10m
Sat 28/1109:15 -
1 stop11h 25m
Deal found 10/8£730
Sun 27/917:30 -
1 stop18h 25m
Mon 12/1017:30 -
1 stop27h 05m
Deal found 7/8£749
Wed 9/1221:55 -
1 stop11h 40m
Sun 13/1220:25 -
1 stop28h 30m
Deal found 10/8£761
Sun 11/1016:00 -
2 stops18h 00m
Sat 17/1007:00 -
2 stops18h 25m
Deal found 11/8£780

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 12 August 2026.

Round-trip from

£575

One-way from

£250
22/9-29/9
  • 22/9-29/9
  • 5 total stops
  • 52h 15m total
  • Washington, D.C. to Northern Ireland
Search Deals
15/9
  • 15/9
  • 2 total stops
  • 34h 50m 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 12 August 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 Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Tue 22/9

20:30-19:40

2 stops18h 10m

Belfast Intl

Tue 29/9

17:10-22:15

3 stops34h 05m

£575

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Sun 11/10

23:20-21:00

2 stops16h 40m

Belfast Intl

Sat 17/10

20:15-15:10

3 stops47h 55m

£612

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Wed 23/9

17:45-19:40

2 stops20h 55m

Belfast Intl

Wed 30/9

08:15-15:10

2 stops35h 55m

£632

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Sun 6/9

20:30-20:15

2 stops18h 45m

Belfast Intl

Sun 13/9

21:40-05:20

3 stops36h 40m

£646
Fastest return journey

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BHD Belfast City

IADBHD

Washington, D.C. Dulles Intl

Wed 18/11

21:55-14:35

1 stop11h 40m

Belfast City

Mon 23/11

07:20-18:30

2 stops16h 10m

£716

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BHD Belfast City

IADBHD

Washington, D.C. Dulles Intl

Sun 6/9

20:30-21:05

3 stops19h 35m

Belfast City

Sun 13/9

07:00-16:38

3 stops38h 38m

£723

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Thu 24/9

20:30-21:40

2 stops20h 10m

Belfast Intl

Thu 1/10

10:20-19:20

2 stops14h 00m

£743

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BHD Belfast City

IADBHD

Washington, D.C. Dulles Intl

Sun 27/9

17:30-16:55

1 stop18h 25m

Belfast City

Mon 12/10

17:30-15:35

1 stop27h 05m

£749

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BHD Belfast City

IADBHD

Washington, D.C. Dulles Intl

Fri 11/9

19:15-20:35

1 stop20h 20m

Belfast City

Wed 16/9

11:35-20:20

1 stop13h 45m

£793

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BHD Belfast City

IADBHD

Washington, D.C. Dulles Intl

Fri 16/10

22:25-18:10

1 stop14h 45m

Belfast City

Mon 19/10

18:30-20:20

1 stop30h 50m

£806

Flights are sorted by cheapest return flights first.

Deals found on 7/8

Showing 1-10 of 28 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?

    Delta and British Airways can get you from Washington, D.C. Dulles Intl Airport to Northern Ireland in just under 18h 25m. Your travel time can differ by up to 1h 55m. 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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How does Cheapflights help users find flights from Dulles Intl to Northern Ireland?

Cheapflights makes it easy to find Dulles Intl to Northern Ireland flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

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

Yes! Cheapflights helps users easily find flights from Dulles Intl to Northern Ireland with no change fees.

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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