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Cheap flights from Northern Ireland to Washington, D.C. Dulles Intl Airport from £537

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — IAD
8 Sep — 15 Sep1
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 9 August 2026.

Fri 4/906:05 -
2 stops21h 10m
Tue 8/920:30 -
2 stops19h 35m
Deal found 7/8£537
Fri 4/907:00 -
2 stops20h 15m
Tue 8/920:30 -
2 stops16h 20m
Deal found 7/8£559
Sun 20/922:10 -
3 stops36h 10m
Sun 27/923:20 -
2 stops16h 40m
Deal found 6/8£594
Fri 4/909:35 -
1 stop12h 50m
Tue 8/917:45 -
1 stop12h 00m
Deal found 7/8£657
Sun 6/907:00 -
3 stops36h 22m
Sun 13/920:30 -
2 stops19h 35m
Deal found 9/8£663
Sun 6/907:00 -
3 stops37h 55m
Sun 13/920:30 -
2 stops20h 00m
Deal found 9/8£672
Fri 4/909:50 -
1 stop10h 45m
Tue 8/911:10 -
2 stops17h 10m
Deal found 7/8£673
Sun 6/909:45 -
1 stop10h 50m
Sun 13/917:30 -
1 stop10h 50m
Deal found 9/8£674
Thu 3/906:30 -
2 stops17h 25m
Mon 7/917:34 -
2 stops16h 56m
Deal found 5/8£687
Wed 2/920:35 -
2 stops27h 20m
Sun 6/919:15 -
1 stop10h 15m
Deal found 5/8£688

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 9 August 2026.

Round-trip from

£537
4/9-8/9
  • 4/9-8/9
  • 4 total stops
  • 40h 45m 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 9 August 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.

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

BFSIAD

Belfast Intl

Fri 4/9

06:05-22:15

2 stops21h 10m

Washington, D.C. Dulles Intl

Tue 8/9

20:30-21:05

2 stops19h 35m

£537

BelfastWashington, D.C.

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

BFSIAD

Belfast Intl

Sun 20/9

21:10-16:45

2 stops24h 35m

Washington, D.C. Dulles Intl

Sun 27/9

22:20-22:35

2 stops19h 15m

£612

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Fri 4/9

09:35-17:25

1 stop12h 50m

Washington, D.C. Dulles Intl

Tue 8/9

17:45-10:45

1 stop12h 00m

£657
Fastest return journey

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Sun 6/9

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Sun 13/9

17:30-09:20

1 stop10h 50m

£674

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Thu 3/9

06:30-18:55

2 stops17h 25m

Washington, D.C. Dulles Intl

Mon 7/9

17:34-15:30

2 stops16h 56m

£687

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Wed 2/9

20:35-18:55

2 stops27h 20m

Washington, D.C. Dulles Intl

Sun 6/9

19:15-10:30

1 stop10h 15m

£688

BelfastWashington, D.C.

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

BFSIAD

Belfast Intl

Sun 6/9

09:35-19:25

2 stops14h 50m

Washington, D.C. Dulles Intl

Sun 13/9

17:15-23:35

2 stops25h 20m

£691

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Sun 6/9

11:00-21:53

2 stops15h 53m

Washington, D.C. Dulles Intl

Sun 13/9

19:15-18:45

1 stop18h 30m

£724

Flights are sorted by cheapest return flights first.

Deals found on 7/8

Sorted by cheapest first

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, Delta, and KLM fly from Northern Ireland to Washington, D.C. Dulles Intl Airport in about 10h 45m. The time it takes to get you to your destination can typically vary by up to 2h 05m. The distance from Northern Ireland to Washington, D.C. Dulles Intl Airport is about 3390 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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
Gaithersburg
Oxon Hill
Alexandria
Hanover
Woodbridge
Glen Burnie
Springfield
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.
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Newcastle upon Tyne to Reagan-National flights
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Belfast City to Reagan-National flights
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Southend to Dulles Intl flights
Aberdeen to Reagan-National flights
Aberdeen to Baltimore flights
Inverness to Baltimore flights
Belfast Intl to Baltimore flights
Belfast City to Baltimore flights
Bristol to Baltimore flights
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Liverpool to Baltimore 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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