Cheap flights from Belfast City Airport to Seattle from £664
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/11. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Belfast City to Seattle
Cheapest flights from Belfast City to SeattleExplore the most affordable flight options available from Belfast City to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 October 2026.
Explore the most affordable flight options available from Belfast City to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 October 2026.
Best flights from Belfast City to SeattleDiscover carefully curated flight deals from Belfast City to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 October 2026.
Discover carefully curated flight deals from Belfast City to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 October 2026.
Last-minute flights from Belfast City to SeattleDiscover last-minute flight deals from Belfast City to Seattle. Data last updated 8 October 2026 and is based on user searches.
Discover last-minute flight deals from Belfast City to Seattle. Data last updated 8 October 2026 and is based on user searches.
Find flight deals from Belfast City to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Belfast City (BHD) 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 8 October 2026.
Cheapflights Fare Finder
Use the filters below to find and compare flights from Belfast City Airport to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
BelfastSeattle
BHD Belfast City - SEA Seattle/Tacoma Intl
BHDSEA
Belfast City
Mon 23/11
09:25-17:00
1 stop15h 35m
Seattle/Tacoma Intl
Mon 30/11
18:45-18:35
1 stop15h 50m
BelfastSeattle
BHD Belfast City - SEA Seattle/Tacoma Intl
BHDSEA
Belfast City
Thu 14/1
15:25-16:50
1 stop33h 25m
Seattle/Tacoma Intl
Mon 18/1
10:17-16:05
2 stops21h 48m
BelfastSeattle
BHD Belfast City - SEA Seattle/Tacoma Intl
BHDSEA
Belfast City
Thu 14/1
06:30-16:50
1 stop18h 20m
Seattle/Tacoma Intl
Sun 17/1
18:45-16:50
1 stop14h 05m
BelfastSeattle
BHD Belfast City - SEA Seattle/Tacoma Intl
BHDSEA
Belfast City
Mon 23/11
11:40-16:50
1 stop13h 10m
Seattle/Tacoma Intl
Mon 30/11
06:09-14:15
2 stops24h 06m
Best time to book a flight from Belfast City to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Belfast City with our price prediction graph.
Related info for your journey
Find useful and relevant information for your journey from Belfast City to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Belfast City to Seattle
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Complete your trip
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Direct flights to Washington
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Belfast City and Seattle flights
Browse other Belfast City and Seattle flight options. Last updated on 8 October 2026.
Other flights from Belfast City
Browse through other flights departing from Belfast City. Flights are based on user searches made on Cheapflights and were last updated on 8 October 2026.
Popular flight searches
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Other flights to Seattle
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How does Cheapflights help users find flights from Belfast City to Seattle?
Cheapflights helps you search for flights from Belfast City to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Belfast City to Seattle?
Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Belfast City to Seattle for you. Better yet — we are completely free to use.
Can Cheapflights find flights from Belfast City to Seattle with no change fees?
Yes! Cheapflights helps users easily find flights from Belfast City to Seattle with no change fees.
Can Cheapflights notify me if prices for flights from Belfast City to Seattle become cheaper?
Yes! Start tracking prices for Belfast City to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.