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Cheap flights from Belfast Intl Airport to Seattle from £375

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Belfast Intl Airport to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:35 - 19:00BFS  Belfast Intl-SEA Seattle/Tacoma Intl
20h 25m1 stop London Stansted
Multiple Airlines Logo
21:40 - 23:25SEA  Seattle/Tacoma Intl-BFS Belfast Intl
17h 45m1 stop London Heathrow
£507Multiple Airlines
Thu, 15 Oct - Thu, 22 Oct
Multiple Airlines Logo
20:40 - 17:00BFS  Belfast Intl-SEA Seattle/Tacoma Intl
28h 20m3 stops London Stansted Stockholm Arlanda Reykjavik Keflavik Intl
Multiple Airlines Logo
14:35 - 21:40SEA  Seattle/Tacoma Intl-BFS Belfast Intl
23h 05m2 stops Reykjavik Keflavik Intl Manchester
£692Multiple Airlines
Sun, 8 Nov - Sun, 15 Nov
Multiple Airlines Logo
06:35 - 19:00BFS  Belfast Intl-SEA Seattle/Tacoma Intl
20h 25m1 stop London Stansted
Multiple Airlines Logo
19:35 - 16:30SEA  Seattle/Tacoma Intl-BFS Belfast Intl
36h 55m2 stops Calgary Edinburgh Turnhouse
£716Multiple Airlines
Thu, 15 Oct - Thu, 22 Oct
Multiple Airlines Logo
20:40 - 17:00BFS  Belfast Intl-SEA Seattle/Tacoma Intl
28h 20m3 stops London Stansted Stockholm Arlanda Reykjavik Keflavik Intl
Multiple Airlines Logo
14:35 - 20:35SEA  Seattle/Tacoma Intl-BFS Belfast Intl
22h 00m3 stops Reykjavik Keflavik Intl Václav Havel Prague London Stansted
£741Multiple Airlines
Sun, 8 Nov - Sun, 15 Nov
Multiple Airlines Logo
06:15 - 17:00BFS  Belfast Intl-SEA Seattle/Tacoma Intl
18h 45m2 stops Edinburgh Turnhouse Reykjavik Keflavik Intl
Multiple Airlines Logo
14:35 - 21:40SEA  Seattle/Tacoma Intl-BFS Belfast Intl
23h 05m2 stops Reykjavik Keflavik Intl Manchester
£872Multiple Airlines
Sun, 8 Nov - Sun, 15 Nov
Multiple Airlines Logo
08:10 - 22:47BFS  Belfast Intl-SEA Seattle/Tacoma Intl
22h 37m3 stops London Gatwick Toronto Pearson Intl Vancouver Intl
Multiple Airlines Logo
07:55 - 11:50SEA  Seattle/Tacoma Intl-BFS Belfast Intl
19h 55m2 stops Toronto Pearson Intl Edinburgh Turnhouse
£1,089Multiple Airlines
Thu, 15 Oct - Thu, 22 Oct
Multiple Airlines Logo
10:20 - 17:55BFS  Belfast Intl-SEA Seattle/Tacoma Intl
15h 35m2 stops Manchester Reykjavik Keflavik Intl
Multiple Airlines Logo
19:00 - 18:55SEA  Seattle/Tacoma Intl-BFS Belfast Intl
15h 55m2 stops Reykjavik Keflavik Intl Edinburgh Turnhouse
£1,093Multiple Airlines
Thu, 15 Oct - Thu, 22 Oct

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Use the filters below to find and compare flights from Belfast Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 15/10

06:35-19:00

1 stop20h 25m

Seattle/Tacoma Intl

Thu 22/10

21:40-23:25

1 stop17h 45m

£507

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Sun 8/11

20:40-17:00

3 stops28h 20m

Seattle/Tacoma Intl

Sun 15/11

14:35-21:40

2 stops23h 05m

£692

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 15/10

06:35-19:00

1 stop20h 25m

Seattle/Tacoma Intl

Thu 22/10

19:35-16:30

2 stops36h 55m

£716

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Sun 8/11

20:40-17:00

3 stops28h 20m

Seattle/Tacoma Intl

Sun 15/11

14:35-20:35

3 stops22h 00m

£741

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Sun 8/11

06:15-17:00

2 stops18h 45m

Seattle/Tacoma Intl

Sun 15/11

14:35-21:40

2 stops23h 05m

£872

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 15/10

08:10-22:47

3 stops22h 37m

Seattle/Tacoma Intl

Thu 22/10

07:55-11:50

2 stops19h 55m

£1,089
Fastest return journey

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 15/10

10:20-17:55

2 stops15h 35m

Seattle/Tacoma Intl

Thu 22/10

19:00-18:55

2 stops15h 55m

£1,093
Cheapest one-way

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 15/10

20:40-09:40

2 stops45h 00m

£375

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 15/10

20:40-07:08

3 stops42h 28m

£423
Fastest single journey

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 15/10

09:15-19:00

1 stop17h 45m

£461

Flights are sorted by cheapest return flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
1
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When to book flights from Belfast Intl Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Belfast Intl Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Belfast Intl Airport to Seattle (BFS to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Belfast Intl Airport to Seattle

Best price found

£375

Fastest flight time

13h 05m

Direct flights

None
The best one-way flight to Seattle from Belfast Intl Airport in the past 72 hours is £375. The best return flight deal from Belfast Intl Airport to Seattle found on momondo in the last 72 hours is £507.
The fastest flight from Belfast Intl Airport to Seattle takes 13h 05m
There are no direct flights from Belfast Intl Airport to Seattle. There are no popular flight routes from Belfast Intl Airport to Seattle.
Search flight deals

Frequently asked questions about flying from Belfast Intl Airport to Seattle

  • How far is Belfast Intl to Seattle/Tacoma Intl by plane?

    Belfast Intl and Seattle/Tacoma Intl are 4452.2 mi apart from one another. Flights usually cover this in 13h 05m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Belfast Intl Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Belfast Intl Airport to Seattle/Tacoma Intl Airport were last updated today.

  • How old do you have to be to fly from Belfast Intl Airport to Seattle/Tacoma Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Belfast Intl Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Belfast Intl Airport to Seattle

  • How do I get Price Alerts for flights from Belfast Intl Airport to Seattle?

    Confirm your travel details to search for the latest offers for flights from Belfast Intl Airport to Seattle. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Belfast Intl Airport to Seattle with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Westport
Kirkland
Ashford
Tacoma
SeaTac
Kent
Tukwila
Fife

Why use momondo?

Why should I use momondo to find a flight deal from Belfast to Seattle?

Finding the right flight to Seattle from Belfast is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

Can I find flights from Belfast to Seattle with flexible booking policies on momondo?

Yes. All flights to Seattle from Belfast on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Belfast to Seattle?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Belfast to Seattle.

I’m not ready to book a flight from Belfast to Seattle right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Belfast to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.

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