HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Northern Ireland

$255+ Cheap flights from Washington to Northern Ireland

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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Northern Ireland 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 Washington to Northern Ireland

Cheapest flights from Washington to Northern Ireland
Explore the most affordable flight options available from Washington to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 1/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/76:50 pm
SEA
-
BHD
1 stop16h 50m
British Airways
Wed 3/1811:25 am
BHD
-
SEA
1 stop13h 30m
British Airways
Deal found 1/20$597
This Cheapflightsfares deal was found by Cheapflights users on 1/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/76:50 pm
SEA
-
BHD
1 stop16h 50m
British Airways
Tue 3/178:45 am
BHD
-
SEA
1 stop16h 10m
British Airways
Deal found 1/21$598
This British Airways deal was found by Cheapflights users on 1/19. 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.
Wed 3/45:45 pm
PDX
-
BHD
1 stop12h 30m
British Airways
Sun 3/88:25 pm
BHD
-
PDX
1 stop27h 30m
British Airways
Deal found 1/19$601
This oojo deal was found by Cheapflights users on 1/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1211:32 am
SEA
-
BHD
2 stops16h 53m
British Airways
Tue 9/229:35 am
BHD
-
SEA
1 stop16h 50m
British Airways
Deal found 1/19$637
This oojo deal was found by Cheapflights users on 1/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/222:04 pm
SEA
-
BHD
2 stops20h 46m
British Airways
Mon 1/267:25 pm
BHD
-
SEA
1 stop24h 05m
British Airways
Deal found 1/20$866
This Air France deal was found by Cheapflights users on 1/20. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/2211:55 am
SEA
-
BHD
2 stops20h 55m
Multiple Airlines
Mon 1/265:20 pm
BHD
-
SEA
2 stops29h 40m
Multiple Airlines
Deal found 1/20$906
This Cheapflightsfares deal was found by Cheapflights users on 1/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/181:35 pm
SEA
-
BHD
1 stop12h 35m
British Airways
Tue 6/238:25 pm
BHD
-
SEA
1 stop23h 10m
British Airways
Deal found 1/20$1,011
This Mytrip deal was found by Cheapflights users on 1/20. 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 1/223:10 pm
SEA
-
BFS
3 stops24h 35m
Multiple Airlines
Mon 1/269:00 pm
BFS
-
SEA
2 stops28h 00m
Multiple Airlines
Deal found 1/20$1,044
This Mytrip deal was found by Cheapflights users on 1/20. 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 3/61:25 pm
PDX
-
BFS
2 stops24h 35m
Multiple Airlines
Fri 3/136:30 am
BFS
-
PDX
2 stops18h 30m
Multiple Airlines
Deal found 1/20$1,096
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:55 pm
SEA
-
BFS
2 stops17h 25m
Multiple Airlines
Fri 5/296:15 am
BFS
-
SEA
1 stop20h 35m
Multiple Airlines
Deal found 1/21$1,135
This oojo deal was found by Cheapflights users on 1/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/201:52 pm
PDX
-
BHD
2 stops20h 23m
British Airways
Sun 3/291:10 pm
BHD
-
PDX
2 stops43h 05m
British Airways
Deal found 1/21$1,201
This oojo deal was found by Cheapflights users on 1/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/2010:32 am
PDX
-
BHD
2 stops20h 43m
Multiple Airlines
Fri 3/2711:30 am
BHD
-
PDX
2 stops28h 53m
Multiple Airlines
Deal found 1/20$1,269

Find flight deals from Washington to Northern Ireland

Keep the following information in mind while searching for Washington to Northern Ireland flight deals. Data was last updated January 21, 2026.

Round-trip from

$597
(Cheapflightsfares)

One-way from

$255
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$951
From Washington to Northern Ireland
Search Deals
One-way flight from Washington to Northern Ireland
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($121 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($60 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Northern Ireland 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 January 21, 2026.
Use the filters below to find and compare flights from Washington to Northern Ireland that are best for you.

Fly from

Washington

Fly to

Northern Ireland

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:35 pm-11:10 am

1 stop13h 35m

Belfast City

Tue 3/17

8:45 am-5:55 pm

1 stop16h 10m

$597

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-7:40 pm

1 stop16h 50m

Belfast City

Wed 3/18

11:25 am-5:55 pm

1 stop13h 30m

$597

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 3/4

5:45 pm-2:15 pm

1 stop12h 30m

Belfast City

Sun 3/8

8:25 pm-4:55 pm

1 stop27h 30m

$601

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Fri 3/6

1:25 pm-10:00 pm

2 stops24h 35m

Belfast Intl

Fri 3/13

6:30 am-6:00 pm

2 stops18h 30m

$1,096

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 5/13

6:55 pm-8:20 pm

2 stops17h 25m

Belfast Intl

Fri 5/29

6:15 am-6:50 pm

1 stop20h 35m

$1,135

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 3/20

1:52 pm-5:15 pm

2 stops20h 23m

Belfast City

Sun 3/29

1:10 pm-12:15 am

2 stops43h 05m

$1,201

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 3/20

10:32 am-2:15 pm

2 stops20h 43m

Belfast City

Fri 3/27

11:30 am-9:23 am

2 stops28h 53m

$1,269

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 3/20

5:40 am-10:30 am

2 stops21h 50m

Belfast City

Fri 3/27

8:45 am-10:02 pm

2 stops20h 17m

$1,349

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Fri 3/20

2:25 pm-10:00 pm

2 stops24h 35m

Belfast Intl

Fri 3/27

6:30 am-9:15 am

3 stops33h 45m

$2,440

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Fri 5/15

7:00 pm-9:50 pm

2 stops18h 50m

$255

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 11 results
1
2

Best time to book a flight from Washington to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Washington 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 Washington to Northern Ireland
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 Washington to Northern Ireland. 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 State of Washington to Northern Ireland?

    British Airways can get you from State of Washington to Northern Ireland in just under 13h 35m. Your travel time can differ by up to . There are 4472 mi between State of Washington and Northern Ireland.

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

    Yes. In addition to deals on Washington to Northern Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.

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

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

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

    Yes. Cheapflights offers flight deals from Washington to Northern Ireland 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

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.

Alternative routes for Washington to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
Boston to Heathrow flights
LaGuardia to Heathrow flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to London City flights
Los Angeles to Heathrow flights
Newark to Gatwick flights
John F Kennedy Intl to Gatwick flights
O'Hare Intl to Heathrow flights
Dallas/Fort Worth to Heathrow flights
LaGuardia to Gatwick flights
John F Kennedy Intl to Stansted flights
San Francisco to Heathrow flights
Baltimore to Heathrow flights
Seattle to Heathrow flights
Boston to Gatwick flights
Atlanta to Heathrow flights
John F Kennedy Intl to Luton flights
Miami to Heathrow flights
Boston to London City flights
Orlando to Heathrow flights
Newark to London City flights
Newark to Stansted flights
Reagan-National to Heathrow flights
Hobby to Heathrow flights
Dulles Intl to Gatwick flights
Newark to Luton flights
Denver to Heathrow flights
Philadelphia to Heathrow flights
Dulles Intl to London City flights
Los Angeles to Gatwick flights
Boston to Stansted flights
O'Hare Intl to Gatwick flights
Dulles Intl to Stansted flights
Newark to Edinburgh flights
Tampa to Heathrow flights
Baltimore to Gatwick flights
Los Angeles to London City flights
John F Kennedy Intl to Edinburgh flights
Minneapolis to Heathrow flights
O'Hare Intl to London City flights
Reagan-National to Gatwick flights
San Francisco to Gatwick flights
Los Angeles to Stansted flights
Dallas/Fort Worth to Gatwick flights
Charlotte to Heathrow flights
O'Hare Intl to Stansted flights
Detroit to Heathrow flights
George Bush Intcntl to Heathrow flights

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.