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Northern Ireland

$450+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap 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 29, 2026.

This oojo 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 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 stop16h 50m
British Airways
Tue 3/178:45 am
BHD
-
SEA
1 stop16h 10m
British Airways
Deal found 1/27$624
This British Airways deal was found by Cheapflights users on 1/28. 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 3/46:50 pm
SEA
-
BHD
1 stop13h 45m
British Airways
Sun 3/88:25 pm
BHD
-
SEA
1 stop28h 30m
British Airways
Deal found 1/28$630
This KAYAK deal was found by Cheapflights users on 1/28. 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.
Sat 3/76:50 pm
SEA
-
BHD
1 stop13h 55m
British Airways
Wed 3/185:40 pm
BHD
-
SEA
1 stop31h 15m
British Airways
Deal found 1/28$646
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/31:29 pm
SEA
-
BHD
2 stops21h 16m
British Airways
Tue 5/126:30 am
BHD
-
SEA
1 stop13h 05m
British Airways
Deal found 1/27$648
This Air France 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/35:30 pm
SEA
-
BHD
1 stop15h 25m
Multiple Airlines
Tue 5/129:50 am
BHD
-
SEA
1 stop14h 40m
Multiple Airlines
Deal found 1/27$665
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/97:50 pm
SEA
-
BFS
2 stops16h 15m
Multiple Airlines
Sun 3/1510:10 pm
BFS
-
SEA
2 stops45h 20m
Multiple Airlines
Deal found 1/28$729
This British Airways deal was found by Cheapflights users on 1/28. 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 2/256:50 pm
SEA
-
BHD
1 stop13h 45m
British Airways
Sun 3/13:10 pm
BHD
-
SEA
1 stop33h 45m
British Airways
Deal found 1/28$733
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 3/134:10 pm
SEA
-
BFS
3 stops23h 35m
Multiple Airlines
Fri 3/207:50 am
BFS
-
SEA
3 stops41h 15m
Multiple Airlines
Deal found 1/27$1,298

Find 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 29, 2026.

Round-trip from

$624
(oojo)

One-way from

$450
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$951
From Seattle/Tacoma Intl to Northern Ireland
Search Deals
One-way flight from Seattle/Tacoma Intl 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 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 29, 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-7:40 pm

1 stop16h 50m

Belfast City

Tue 3/17

8:45 am-5:55 pm

1 stop16h 10m

$624

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-7:40 pm

1 stop16h 50m

Belfast City

Wed 3/18

7:25 pm-5:55 pm

1 stop29h 30m

$624

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 3/4

6:50 pm-4:35 pm

1 stop13h 45m

Belfast City

Sun 3/8

3:10 pm-5:55 pm

1 stop33h 45m

$627

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 5/3

1:29 pm-6:45 pm

2 stops21h 16m

Belfast City

Tue 5/12

6:30 am-11:35 am

1 stop13h 05m

$648

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Mon 3/9

7:50 pm-7:05 pm

2 stops16h 15m

Belfast Intl

Sun 3/15

10:10 pm-12:30 pm

2 stops45h 20m

$729

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Fri 3/13

3:00 pm-6:55 pm

2 stops20h 55m

Belfast Intl

Fri 3/20

11:45 am-1:10 pm

2 stops32h 25m

$1,346

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 5/28

11:25 pm-9:50 pm

2 stops38h 25m

$450

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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

How much does it cost to fly round-trip from Seattle to Northern Ireland?

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 16h 50m. 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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