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Cheap flights from Northern Ireland to Washington, D.C. Dulles Intl Airport from £351

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 23/6. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — IAD
19 Apr — 26 Apr1
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 20 March 2026.

Thu 23/419:30
BHD
-
IAD
1 stop25h 25m
British Airways
Mon 27/422:15
IAD
-
BHD
1 stop12h 15m
British Airways
Deal found 15/3£605
Thu 3/916:35
BHD
-
IAD
2 stops27h 55m
British Airways
Mon 7/917:20
IAD
-
BHD
2 stops14h 35m
British Airways
Deal found 18/3£629
Fri 1/507:35
BFS
-
IAD
3 stops41h 30m
Multiple Airlines
Fri 8/520:30
IAD
-
BFS
3 stops21h 50m
Multiple Airlines
Deal found 16/3£689

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 20 March 2026.

Round-trip from

£605

One-way from

£351
British Airways
  • British Airways
  • 23/4-27/4
  • 2 total stops
  • 37h 40m total
  • Northern Ireland to Washington, D.C.
Search Deals
23/6
  • 23/6
  • 3 total stops
  • 40h 25m 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 20 March 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
Fastest return journey

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 23/4

19:30-15:55

1 stop25h 25m

Washington, D.C. Dulles Intl

Mon 27/4

22:15-15:30

1 stop12h 15m

£605

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 3/9

16:35-15:30

2 stops27h 55m

Washington, D.C. Dulles Intl

Mon 7/9

17:20-12:55

2 stops14h 35m

£629

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Fri 1/5

07:35-20:05

3 stops41h 30m

Washington, D.C. Dulles Intl

Fri 8/5

20:30-23:20

3 stops21h 50m

£689
Cheapest one-way

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 23/6

17:20-19:00

3 stops30h 40m

£372

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Tue 23/6

20:10-19:15

2 stops28h 05m

£379

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Sat 25/7

11:05-15:10

3 stops33h 05m

£554
Fastest single journey

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 23/6

09:40-15:50

1 stop11h 10m

£581

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Sat 25/7

16:15-17:25

1 stop30h 10m

£944

Flights are sorted by cheapest return flights first.

Deals found on 17/3

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 British Airways fly from Northern Ireland to Washington, D.C. Dulles Intl Airport in about 25h 25m. 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
College Park

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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
Heathrow to Reagan-National flights
Stansted to Dulles Intl flights
Gatwick 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
Stansted to Baltimore flights
Edinburgh to Reagan-National flights
Edinburgh to Baltimore flights
Birmingham to Dulles Intl flights
Luton to Baltimore flights
Glasgow Intl to Dulles Intl flights
London City to Baltimore flights
Birmingham to Baltimore flights
Glasgow Intl to Reagan-National flights
Glasgow Intl to Baltimore flights
Newcastle upon Tyne to Dulles Intl flights
Birmingham to Reagan-National flights
London City to Reagan-National flights
Southampton to Dulles Intl flights
Belfast City to Dulles Intl flights
Belfast Intl to Dulles Intl flights
Leeds to Dulles Intl flights
Southend to Dulles Intl flights
Belfast City to Baltimore flights
Leeds to Baltimore flights
Belfast Intl to Baltimore flights
Newcastle upon Tyne to Baltimore flights
Grimsby to Dulles Intl flights
Liverpool to Baltimore flights
Grimsby to Baltimore flights
Newcastle upon Tyne to Reagan-National flights
Southampton to Baltimore flights
Bristol to Baltimore flights
Norwich to Baltimore flights
Norwich to Reagan-National flights
Norwich to Dulles Intl flights
Inverness to Reagan-National flights
Inverness to Dulles Intl flights
Aberdeen to Baltimore flights
Aberdeen to Dulles Intl flights

Fly with Cheapflights

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

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Millions of users choose and trust Cheapflights to book the best flight deals from Northern Ireland to Dulles Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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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