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Cheap flights from Northern Ireland to Washington, D.C. Dulles Intl Airport from £341

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 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — IAD
10 Jun — 17 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Northern Ireland to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Northern Ireland to Dulles Intl
Explore the most affordable flight options available from Northern Ireland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 May 2026.

Sat 26/1211:35
BHD
-
IAD
1 stop13h 20m
British Airways
Sat 2/121:45
IAD
-
BHD
1 stop14h 00m
British Airways
Deal found 10/5£732
Fri 22/507:00
BHD
-
IAD
2 stops13h 45m
Aer Lingus
Mon 25/517:15
IAD
-
BHD
2 stops16h 45m
Aer Lingus
Deal found 9/5£741
Tue 23/616:25
BHD
-
IAD
1 stop30h 05m
American Airlines
Tue 11/817:34
IAD
-
BHD
2 stops16h 46m
American Airlines
Deal found 9/5£767
Fri 22/508:20
BFS
-
IAD
2 stops16h 05m
Multiple Airlines
Mon 25/517:15
IAD
-
BFS
2 stops13h 00m
Multiple Airlines
Deal found 9/5£771
Wed 11/1111:25
BHD
-
IAD
1 stop13h 30m
British Airways
Sun 15/1121:45
IAD
-
BHD
1 stop11h 10m
British Airways
Deal found 6/5£803
Fri 22/507:00
BHD
-
IAD
3 stops18h 29m
Multiple Airlines
Mon 25/517:15
IAD
-
BHD
2 stops18h 15m
Multiple Airlines
Deal found 9/5£936
Tue 23/609:50
BHD
-
IAD
2 stops14h 45m
KLM
Tue 11/812:29
IAD
-
BHD
2 stops15h 51m
KLM
Deal found 6/5£1,247

Find flight deals from Northern Ireland to Dulles Intl

Keep the following information in mind while searching for Northern Ireland to Dulles Intl flight deals. Data was last updated 11 May 2026.

Round-trip from

£741

One-way from

£341
Aer Lingus
  • Aer Lingus
  • 22/5-25/5
  • 4 total stops
  • 30h 30m total
  • Northern Ireland to Washington, D.C.
Search Deals
24/8
  • 24/8
  • 3 total stops
  • 50h 55m total
  • Northern Ireland to Washington, D.C.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Northern Ireland to Dulles Intl 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 11 May 2026.
Use the filters below to find and compare flights from Northern Ireland to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 23/6

16:25-20:20

1 stop32h 55m

Washington, D.C. Dulles Intl

Tue 11/8

22:25-17:35

1 stop14h 10m

£767

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Fri 22/5

08:20-19:25

2 stops16h 05m

Washington, D.C. Dulles Intl

Mon 25/5

17:15-11:15

2 stops13h 00m

£771
Fastest return journey

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Fri 22/5

06:30-15:45

1 stop14h 15m

Washington, D.C. Dulles Intl

Mon 25/5

22:25-17:30

1 stop14h 05m

£1,159

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 23/6

09:50-19:35

2 stops14h 45m

Washington, D.C. Dulles Intl

Tue 11/8

12:29-09:20

2 stops15h 51m

£1,247
Cheapest one-way

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 18/10

07:10-19:00

3 stops40h 50m

£353

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 21/6

22:10-19:00

3 stops49h 50m

£357

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Mon 24/8

17:35-19:35

2 stops31h 00m

£359

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Wed 30/9

09:55-19:10

3 stops38h 15m

£376

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Wed 30/9

16:10-19:10

3 stops32h 00m

£401

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Wed 15/7

05:55-19:58

3 stops43h 03m

£403

Flights are sorted by cheapest return flights first.

Deals found on 9/5

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Northern Ireland to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Northern Ireland 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 Northern Ireland to Washington, D.C. Dulles Intl Airport
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 Northern Ireland to Dulles Intl. 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 Northern Ireland to Washington, D.C. Dulles Intl Airport?

    Airlines like American Airlines fly from Northern Ireland to Washington, D.C. Dulles Intl Airport in about 32h 55m. The time it takes to get you to your destination can typically vary by up to . The distance from Northern Ireland to Washington, D.C. Dulles Intl Airport is about 3390 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Northern Ireland to Dulles Intl 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

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Gaithersburg
Woodbridge
Arlington
Alexandria
Sterling

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Alternative routes for Northern Ireland to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dulles Intl flights
Heathrow to Baltimore flights
Gatwick to Dulles Intl flights
Heathrow to Reagan-National flights
Stansted to Dulles Intl flights
London City to Dulles Intl flights
Gatwick to Baltimore flights
Gatwick to Reagan-National flights
Luton to Dulles Intl flights
Edinburgh to Dulles Intl flights
Manchester to Dulles Intl flights
Manchester to Baltimore flights
Manchester to Reagan-National flights
Luton to Baltimore flights
Newcastle upon Tyne to Dulles Intl flights
Stansted to Baltimore flights
Edinburgh to Baltimore flights
London City to Baltimore flights
Edinburgh to Reagan-National flights
Glasgow Intl to Dulles Intl flights
Leeds to Dulles Intl flights
Newcastle upon Tyne to Baltimore flights
Birmingham to Dulles Intl flights
Newcastle upon Tyne to Reagan-National flights
Glasgow Intl to Baltimore flights
Glasgow Intl to Reagan-National flights
Birmingham to Reagan-National flights
Birmingham to Baltimore flights
London City to Reagan-National flights
Bristol to Dulles Intl flights
Belfast Intl to Baltimore flights
Belfast City to Baltimore flights
Southampton to Baltimore flights
Leeds to Baltimore flights
Southend to Dulles Intl flights
Southampton to Dulles Intl flights
Newquay to Baltimore flights
Aberdeen to Reagan-National flights
Aberdeen to Baltimore flights
Belfast Intl to Dulles Intl flights
Belfast City to Dulles Intl flights
Bristol to Baltimore flights
Inverness to Baltimore flights
Norwich to Dulles Intl flights
Cardiff to Reagan-National flights
Cardiff to Dulles Intl flights
Aberdeen to Dulles Intl flights
Southampton to Reagan-National flights
Bristol to Reagan-National flights

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

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Northern Ireland to Dulles Intl flexibly with Cheapflights today.

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

Yes, Cheapflights offers price alerts on Northern Ireland to Dulles Intl flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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