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$924+ Cheap flights from Belfast to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
Mar 16 — Mar 231
Mon 3/16
Mon 3/23
1 adult, Economy
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Cheap flight deals from Belfast to Seattle

Cheapest flights from Belfast to Seattle
Explore the most affordable flight options available from Belfast to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 14, 2026.

This British Airways deal was found by Cheapflights users on 2/12. 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 2/12$924
This British Airways deal was found by Cheapflights users on 2/10. 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 2/186:35 am
BHD
-
SEA
2 stops24h 29m
British Airways
Sun 2/221:37 pm
SEA
-
BHD
2 stops40h 38m
British Airways
Deal found 2/10$1,099
This Mytrip deal was found by Cheapflights users on 2/10. 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 3/278:05 am
BFS
-
SEA
2 stops18h 15m
Multiple Airlines
Fri 4/37:10 pm
SEA
-
BFS
2 stops18h 05m
Multiple Airlines
Deal found 2/10$1,493
This Booking.com deal was found by Cheapflights users on 2/11. 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.
Sat 3/287:50 pm
BFS
-
SEA
2 stops28h 25m
Multiple Airlines
Sat 4/48:00 am
SEA
-
BFS
3 stops24h 35m
Multiple Airlines
Deal found 2/11$1,643

Find flight deals from Belfast to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 14, 2026.

Round-trip from

$924
(British Airways)
From Belfast to Seattle/Tacoma Intl
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Belfast 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 February 14, 2026.
Use the filters below to find and compare flights from Belfast to Seattle that are best for you.

Fly from

Belfast

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

7:21 am-2:15 pm

2 stops23h 54m

$924

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 3/27

8:05 am-7:20 pm

2 stops18h 15m

Seattle/Tacoma Intl

Fri 4/3

7:10 pm-9:15 pm

2 stops18h 05m

$1,493

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 3/28

7:50 pm-5:15 pm

2 stops28h 25m

Seattle/Tacoma Intl

Sat 4/4

8:00 am-4:35 pm

3 stops24h 35m

$1,643

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 8/3

9:40 am-11:35 am

1 stop33h 55m

$1,056

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/13

Best time to book a flight from Belfast to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Belfast 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 Belfast to Seattle
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 Belfast to Seattle. 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 into for flights to Seattle from Belfast?

    Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Belfast to Seattle. You should not have trouble finding flights to Seattle/Tacoma Intl from Belfast; the airport handles an average of 0 inbound flights from Belfast per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Seattle airport from Belfast. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.

  • How long is the flight from Belfast to Seattle?

    Departing from Belfast to Seattle will take you 12h 55m. Airlines will cover a distance of 4472 mi.

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

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

  • How can I find direct flights from Belfast to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Belfast to Seattle 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Edmonds
Lacey
Kent
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

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Alternative routes for Belfast to Seattle

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