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$466+ Cheap flights from Northern Ireland to Washington

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
1 adult, Economy
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Cheap flight deals from Northern Ireland to Washington

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

This British Airways deal was found by Cheapflights users on 2/17. 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.
Sat 3/76:35 am
BHD
-
SEA
1 stop12h 55m
British Airways
Tue 3/107:21 am
SEA
-
BHD
2 stops21h 09m
British Airways
Deal found 2/17$920
This British Airways deal was found by Cheapflights users on 2/18. 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.
Fri 3/66:45 am
BHD
-
SEA
1 stop12h 45m
British Airways
Tue 3/102:25 pm
SEA
-
BHD
1 stop14h 05m
British Airways
Deal found 2/18$947
This KAYAK deal was found by Cheapflights users on 2/18. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/199:05 am
BHD
-
SEA
2 stops22h 19m
British Airways
Sat 3/2110:08 pm
SEA
-
BHD
2 stops29h 12m
British Airways
Deal found 2/18$995
This Booking.com deal was found by Cheapflights users on 2/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/69:55 pm
BFS
-
SEA
2 stops22h 25m
Multiple Airlines
Mon 4/133:40 pm
SEA
-
BFS
2 stops15h 55m
Multiple Airlines
Deal found 2/20$1,053
This Mytrip deal was found by Cheapflights users on 2/18. 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 3/199:55 am
BFS
-
SEA
3 stops30h 40m
Multiple Airlines
Fri 3/203:00 pm
SEA
-
BFS
2 stops24h 00m
Multiple Airlines
Deal found 2/18$1,120
This Mytrip deal was found by Cheapflights users on 2/17. 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.
Sat 4/46:20 am
BFS
-
SEA
2 stops17h 20m
Multiple Airlines
Sat 4/115:40 pm
SEA
-
BFS
2 stops21h 00m
Multiple Airlines
Deal found 2/17$1,148
This British Airways deal was found by Cheapflights users on 2/17. 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 2/1812:25 pm
BHD
-
SEA
2 stops19h 59m
British Airways
Sun 2/221:37 pm
SEA
-
BHD
2 stops37h 03m
British Airways
Deal found 2/17$1,242
This Mytrip deal was found by Cheapflights users on 2/18. 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 3/199:55 am
BFS
-
SEA
3 stops30h 40m
Multiple Airlines
Sat 3/213:00 pm
SEA
-
BFS
2 stops18h 10m
Multiple Airlines
Deal found 2/18$1,269
This British Airways deal was found by Cheapflights users on 2/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2711:30 am
BHD
-
SEA
1 stop13h 25m
British Airways
Tue 3/37:15 am
SEA
-
BHD
2 stops23h 35m
British Airways
Deal found 2/20$1,269

Find flight deals from Northern Ireland to Washington

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

Round-trip from

$920
(British Airways)

One-way from

$466
(Kiwi.com)
From Northern Ireland to Washington
Search Deals
One-way flight from Northern Ireland to Washington
Search Deals

Cheapflights Fare Finder

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

Fly from

Northern Ireland

Fly to

Washington

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:30 am

1 stop12h 55m

Seattle/Tacoma Intl

Tue 3/10

7:21 am-11:30 am

2 stops21h 09m

$920

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/7

6:35 am-11:30 am

1 stop12h 55m

Seattle/Tacoma Intl

Mon 3/9

1:37 pm-2:15 pm

2 stops17h 38m

$937

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 3/6

6:45 am-11:30 am

1 stop12h 45m

Seattle/Tacoma Intl

Tue 3/10

2:25 pm-11:30 am

1 stop14h 05m

$947

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 4/6

9:55 pm-12:20 pm

2 stops22h 25m

Seattle/Tacoma Intl

Mon 4/13

3:40 pm-3:35 pm

2 stops15h 55m

$1,053

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 4/4

6:20 am-3:40 pm

2 stops17h 20m

Seattle/Tacoma Intl

Sat 4/11

5:40 pm-10:40 pm

2 stops21h 00m

$1,148

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 3/19

9:55 am-10:25 am

3 stops31h 30m

Seattle/Tacoma Intl

Fri 3/20

3:00 pm-10:00 pm

2 stops24h 00m

$1,149

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 3/19

8:25 am-6:00 pm

2 stops16h 35m

Seattle/Tacoma Intl

Sat 3/21

3:00 pm-4:10 pm

2 stops18h 10m

$1,493

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 4/2

8:20 am-7:51 pm

3 stops43h 31m

$466

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 4/1

5:00 pm-10:40 am

3 stops49h 40m

$483

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Tue 3/31

8:55 am-10:40 am

3 stops57h 45m

$485

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 23 results
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Best time to book a flight from Northern Ireland to Washington

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

    There are many flights that can get you from Northern Ireland to State of Washington in 12h 55m. Fly via British Airways to get the fastest option. The distance between Northern Ireland and State of Washington is about 4472 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Northern Ireland to Washington 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

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Alternative routes for Northern Ireland to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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