HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$725+ Cheap flights from Northern Ireland to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — IAD
Sep 11 — Sep 181
Fri 9/11
Fri 9/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Northern Ireland to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 August 12, 2026.

This Mytrip deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:05 am -
2 stops21h 10m
Tue 9/88:30 pm -
2 stops19h 35m
Deal found 8/7$725
This Mytrip deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:00 am -
2 stops20h 15m
Tue 9/88:30 pm -
2 stops16h 20m
Deal found 8/7$754
This Mytrip deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:10 am -
2 stops18h 25m
Thu 10/19:45 pm -
2 stops16h 35m
Deal found 8/10$791
This Mytrip deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:10 pm -
2 stops29h 14m
Sun 9/2711:20 pm -
2 stops16h 40m
Deal found 8/7$880
This American Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:35 am -
1 stop12h 50m
Tue 9/85:45 pm -
1 stop12h 00m
Deal found 8/7$887
This Mytrip deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:00 am -
3 stops36h 22m
Sun 9/138:30 pm -
2 stops19h 35m
Deal found 8/9$895
This Mytrip deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/244:00 pm -
2 stops30h 00m
Thu 10/18:20 pm -
2 stops19h 45m
Deal found 8/10$896
This Mytrip deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:00 am -
3 stops37h 55m
Sun 9/138:30 pm -
2 stops20h 00m
Deal found 8/9$907
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:50 am -
1 stop10h 45m
Tue 9/811:10 am -
2 stops17h 10m
Deal found 8/7$908
This KLM deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/69:45 am -
1 stop10h 50m
Sun 9/135:30 pm -
1 stop10h 50m
Deal found 8/9$909
This Delta deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:50 am -
1 stop10h 45m
Thu 10/111:10 am -
2 stops17h 10m
Deal found 8/10$910
This British Airways deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:30 am -
2 stops17h 25m
Mon 9/710:25 pm -
1 stop12h 05m
Deal found 8/7$929

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 August 12, 2026.

Round-trip from

$725
(Mytrip)
From Northern Ireland to Washington, D.C. Dulles Intl
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated August 12, 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 round-trip

BelfastWashington, D.C.

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

BFSIAD

Belfast Intl

Fri 9/4

6:05 am-10:15 pm

2 stops21h 10m

Washington, D.C. Dulles Intl

Tue 9/8

8:30 pm-9:05 pm

2 stops19h 35m

$725

BelfastWashington, D.C.

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

BFSIAD

Belfast Intl

Thu 9/24

6:10 am-7:35 pm

2 stops18h 25m

Washington, D.C. Dulles Intl

Thu 10/1

9:45 pm-7:20 pm

2 stops16h 35m

$791

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Fri 9/4

9:35 am-5:25 pm

1 stop12h 50m

Washington, D.C. Dulles Intl

Tue 9/8

5:45 pm-10:45 am

1 stop12h 00m

$887

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Thu 9/24

4:00 pm-5:00 pm

2 stops30h 00m

Washington, D.C. Dulles Intl

Thu 10/1

8:20 pm-9:05 pm

2 stops19h 45m

$896

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Fri 9/4

9:50 am-3:35 pm

1 stop10h 45m

Washington, D.C. Dulles Intl

Tue 9/8

11:10 am-9:20 am

2 stops17h 10m

$908
Quickest round-trip

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Sun 9/6

9:45 am-3:35 pm

1 stop10h 50m

Washington, D.C. Dulles Intl

Sun 9/13

5:30 pm-9:20 am

1 stop10h 50m

$909

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Thu 9/24

5:30 pm-3:35 pm

1 stop27h 05m

Washington, D.C. Dulles Intl

Thu 10/1

5:30 pm-4:55 pm

1 stop18h 25m

$909

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Thu 9/24

9:50 am-3:35 pm

1 stop10h 45m

Washington, D.C. Dulles Intl

Thu 10/1

11:10 am-9:20 am

2 stops17h 10m

$910

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Wed 9/30

8:35 pm-6:50 pm

2 stops27h 15m

Washington, D.C. Dulles Intl

Sun 10/4

5:45 pm-10:30 am

1 stop11h 45m

$929

BelfastWashington, D.C.

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

BHDIAD

Belfast City

Thu 9/3

6:30 am-6:55 pm

2 stops17h 25m

Washington, D.C. Dulles Intl

Mon 9/7

10:25 pm-3:30 pm

1 stop12h 05m

$929

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/7

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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 round-trip 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?

    A quick flight from Northern Ireland to Washington, D.C. Dulles Intl Airport can take about 10h 45m. American Airlines provides one of the quickest options available for as low as $908. Airlines will cover a distance of 3390 mi. This flight may include one or multiple 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 vacation 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

Traveling 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
Alexandria
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Falls Church
Hanover
Laurel
Sterling
Oxon Hill
Clinton
Hunt Valley
Woodbridge

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.