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Cheap flights from Northern Ireland to Washington, D.C. Dulles Intl Airport from £444

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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — IAD
16 Jul — 23 Jul1
1 adult

Cheap 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 July 2025.

Round-trip from

£556

One-way from

£444
American Airlines
  • American Airlines
  • 20/11-24/11
  • 3 total stops
  • 52h 18m total
  • Northern Ireland to Washington, D.C.
Search Deals
7/8
  • 7/8
  • 2 total stops
  • 21h 10m total
  • Northern Ireland to Washington, D.C.
Search Deals

Find flight deals from Northern Ireland to Dulles Intl

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 July 2025.

Thu 20/1115:05BHD - IAD
1 stop33h 40mAmerican Airlines
Mon 24/1110:52IAD - BHD
2 stops18h 38mAmerican Airlines
Deal found 9/7£556
Thu 7/806:10BFS - IAD
2 stops21h 00mMultiple Airlines
Mon 11/820:30IAD - BFS
2 stops20h 55mMultiple Airlines
Deal found 9/7£565
Thu 7/807:05BHD - IAD
2 stops20h 05mMultiple Airlines
Mon 11/820:30IAD - BHD
2 stops18h 55mMultiple Airlines
Deal found 9/7£596
Thu 7/806:30BHD - IAD
2 stops18h 21mDelta
Mon 11/817:25IAD - BHD
1 stop18h 30mDelta
Deal found 9/7£650
Thu 7/817:25BHD - IAD
1 stop27h 10mKLM
Mon 11/817:25IAD - BHD
1 stop22h 50mKLM
Deal found 9/7£678

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 July 2025.
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

Northern Ireland

Fly to

Dulles Intl

Route

Depart

Return

Price

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 20/11

15:05-19:45

1 stop33h 40m

Washington, D.C. Dulles Intl

Mon 24/11

10:52-10:30

2 stops18h 38m

£556

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Thu 7/8

06:10-22:10

2 stops21h 00m

Washington, D.C. Dulles Intl

Mon 11/8

20:30-22:25

2 stops20h 55m

£565

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 7/8

07:05-22:10

2 stops20h 05m

Washington, D.C. Dulles Intl

Mon 11/8

20:30-20:25

2 stops18h 55m

£596

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 7/8

06:30-19:51

2 stops18h 21m

Washington, D.C. Dulles Intl

Mon 11/8

17:25-16:55

1 stop18h 30m

£650

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 7/8

17:25-15:35

1 stop27h 10m

Washington, D.C. Dulles Intl

Mon 11/8

17:25-21:15

1 stop22h 50m

£678

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Thu 7/8

06:00-22:10

2 stops21h 10m

£444

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 7/8

07:05-22:10

2 stops20h 05m

£494

Flights are sorted by cheapest return flights first.

Deals found on 9/7

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

What is the cheapest time of day to fly from NIR to IAD?

Find hourly flight availability from Northern Ireland to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 July 2025.

When flying from Northern Ireland to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated 11 July 2025.
Check out reviews from past customers who have flown with Delta, KLM, andAmerican Airlines from Northern Ireland to Washington, D.C. Dulles Intl Airport to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,951 reviews
Check prices

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very Good
7,951 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,372 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

  • 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.

  • What is the cheapest month to book a flight from Northern Ireland to Washington, D.C. Dulles Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Northern Ireland to Washington, D.C. Dulles Intl Airport (average of £599). Flying from Northern Ireland to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Northern Ireland?

Book flights to Northern Ireland if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Arlington
Woodbridge
College Park
Laurel
Tysons

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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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Norwich to Reagan-National flights
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Southend to Dulles Intl flights
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