$583+ Cheap flights from Northern Ireland to Seattle (SEA)
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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
Feb 28 — Mar 71
1 adult, Economy
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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 Seattle
Cheapest flights from Northern Ireland to SeattleExplore the most affordable flight options available from Northern Ireland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
Explore the most affordable flight options available from Northern Ireland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
This British Airways deal was found by Cheapflights users on 1/26. 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
Mon 3/97:50 pm
SEA
- BHD
1 stop15h 45m
British Airways
Deal found 1/26![British Airways logo]()
$729
This British Airways deal was found by Cheapflights users on 1/26. 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 2/46:35 am
BHD
- SEA
2 stops23h 32m
British Airways
Sun 2/82:10 pm
SEA
- BHD
2 stops36h 30m
British Airways
Deal found 1/26![British Airways logo]()
$740
This Mytrip deal was found by Cheapflights users on 1/27. 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 1/299:55 am
BFS
- SEA
3 stops20h 11m
Multiple Airlines
Fri 2/62:35 pm
SEA
- BFS
3 stops24h 10m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$1,186
This Booking.com deal was found by Cheapflights users on 1/27. 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.
Fri 3/136:30 am
BFS
- SEA
2 stops22h 46m
Multiple Airlines
Fri 3/204:10 pm
SEA
- BFS
2 stops22h 50m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$1,204
Find flight deals from Northern Ireland to Seattle
Keep the following information in mind while searching for Northern Ireland to Seattle flight deals. Data was last updated January 29, 2026.
Round-trip from | $729 (British Airways) |
|---|---|
One-way from | $583 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from Northern Ireland to Seattle 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 29, 2026.
Use the filters below to find and compare flights from Northern Ireland to Seattle that are best for you.
Fly from
Northern Ireland
Fly to
Seattle
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
Mon 3/9
7:50 pm-6:35 pm
1 stop15h 45m
$729
BelfastSeattle
BFS - SEA
BFSSEA
Belfast Intl
Fri 3/13
6:30 am-10:16 pm
2 stops22h 46m
Seattle/Tacoma Intl
Fri 3/20
4:10 pm-10:00 pm
2 stops22h 50m
$1,204
BelfastSeattle
BFS - SEA
BFSSEA
Belfast Intl
Sat 2/7
11:10 pm-7:55 pm
3 stops52h 45m
$583
BelfastSeattle
BHD - SEA
BHDSEA
Belfast City
Sat 2/7
6:55 am-5:05 pm
3 stops42h 10m
$797
BelfastSeattle
BHD - SEA
BHDSEA
Belfast City
Sat 2/7
11:35 am-4:55 pm
1 stop13h 20m
$1,393
Best time to book a flight from Northern Ireland to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle 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 Seattle
No data available for this route at this time. Please check back soon.
Related info for your journey
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