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Northern Ireland

$434+ Cheap flights from Seattle (SEA) 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 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
1 adult, Economy
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Cheap flight deals from Seattle to Northern Ireland

Keep the following information in mind while searching for Seattle to Northern Ireland flight deals. Data was last updated January 15, 2026.

Round-trip from

$586
(oojo)

One-way from

$434
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

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

Cheapest flights from Seattle to Northern Ireland
Explore the most affordable flight options available from Seattle to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 15, 2026.

This oojo deal was found by Cheapflights users on 1/13. 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 3/71:35 pm
SEA
-
BHD
1 stop16h 40m
British Airways
Tue 3/1710:00 am
BHD
-
SEA
1 stop14h 55m
British Airways
Deal found 1/13$586
This oojo deal was found by Cheapflights users on 1/14. 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 3/76:50 pm
SEA
-
BHD
1 stop13h 55m
British Airways
Wed 3/1812:25 pm
BHD
-
SEA
2 stops18h 59m
British Airways
Deal found 1/14$589
This oojo deal was found by Cheapflights users on 1/14. 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.
Mon 3/167:21 am
SEA
-
BHD
2 stops20h 19m
British Airways
Tue 3/246:00 pm
BHD
-
SEA
2 stops32h 20m
British Airways
Deal found 1/14$596
This British Airways deal was found by Cheapflights users on 1/14. 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 1/218:04 am
SEA
-
BHD
2 stops24h 31m
British Airways
Sun 1/2510:40 am
BHD
-
SEA
2 stops43h 40m
British Airways
Deal found 1/14$704
This Kiwi.com deal was found by Cheapflights users on 1/13. 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.
Fri 5/157:00 pm
SEA
-
BFS
2 stops41h 40m
Multiple Airlines
Mon 5/259:15 am
BFS
-
SEA
1 stop17h 35m
Multiple Airlines
Deal found 1/13$924
This Cheapflightsfares deal was found by Cheapflights users on 1/14. 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.
Mon 3/237:50 pm
SEA
-
BHD
1 stop13h 15m
British Airways
Fri 3/276:45 am
BHD
-
SEA
1 stop12h 45m
British Airways
Deal found 1/14$996

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 15, 2026.
Use the filters below to find and compare flights from Seattle to Northern Ireland that are best for you.

Fly from

Seattle

Fly to

Northern Ireland

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-4:45 pm

1 stop13h 55m

Belfast City

Tue 3/17

8:45 am-5:55 pm

1 stop16h 10m

$586

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-7:40 pm

1 stop16h 50m

Belfast City

Wed 3/18

9:15 am-5:55 pm

1 stop15h 40m

$586

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 3/16

7:21 am-10:40 am

2 stops20h 19m

Belfast City

Tue 3/24

6:00 pm-7:20 pm

2 stops32h 20m

$596

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Tue 6/23

7:05 am-7:45 am

3 stops40h 40m

$434

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 6/23

7:05 am-9:20 am

3 stops42h 15m

$436

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 6/23

8:20 pm-4:25 pm

1 stop12h 05m

$445

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Mon 6/22

4:30 pm-7:05 am

2 stops30h 35m

$459

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 6/22

6:55 pm-7:55 pm

2 stops17h 00m

$468

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 6/21

1:50 pm-4:55 pm

1 stop19h 05m

$503

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 6/24

1:50 pm-4:55 pm

1 stop19h 05m

$503

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 18 results
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Best time to book a flight from Seattle to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Seattle 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 Seattle 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 Seattle to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Northern Ireland?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Northern Ireland.

  • How long is the flight from Seattle to Northern Ireland?

    Airlines like British Airways fly from Seattle to Northern Ireland in about 13h 55m. The time it takes to get you to your destination can typically vary by up to . The distance from Seattle to Northern Ireland is about 4472 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle 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

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Alternative routes for Seattle to Northern Ireland

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