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Cheap flights from Belfast to Seattle from £458

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Belfast to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Iberia Logo
11:35 - 11:35BHD  Belfast City-SEA Seattle/Tacoma Intl
32h 00m1 stop London Heathrow
Iberia Logo
13:30 - 10:10SEA  Seattle/Tacoma Intl-BHD Belfast City
12h 40m1 stop London Heathrow
£641Iberia
Mon, 5 Oct - Thu, 22 Oct
Iberia Logo
11:35 - 00:36BHD  Belfast City-SEA Seattle/Tacoma Intl
21h 01m2 stops London Heathrow Chicago O'Hare Intl
Iberia Logo
15:14 - 15:30SEA  Seattle/Tacoma Intl-BHD Belfast City
16h 16m2 stops Chicago O'Hare Intl London Heathrow
£645Iberia
Mon, 5 Oct - Thu, 22 Oct
Multiple Airlines Logo
06:40 - 22:42BFS  Belfast Intl-SEA Seattle/Tacoma Intl
24h 02m3 stops London Stansted Munich Franz Josef Strauss Vancouver Intl
Multiple Airlines Logo
19:00 - 23:05SEA  Seattle/Tacoma Intl-BFS Belfast Intl
20h 05m2 stops Reykjavik Keflavik Intl Glasgow Intl
£700Multiple Airlines
Mon, 5 Oct - Thu, 22 Oct
Multiple Airlines Logo
06:40 - 22:42BFS  Belfast Intl-SEA Seattle/Tacoma Intl
24h 02m3 stops London Stansted Munich Franz Josef Strauss Vancouver Intl
Multiple Airlines Logo
19:00 - 23:25SEA  Seattle/Tacoma Intl-BFS Belfast Intl
20h 25m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen London Stansted
£704Multiple Airlines
Mon, 5 Oct - Thu, 22 Oct
Multiple Airlines Logo
06:15 - 09:40BFS  Belfast Intl-SEA Seattle/Tacoma Intl
35h 25m3 stops London Gatwick Halifax Intl Calgary
Multiple Airlines Logo
19:00 - 21:05SEA  Seattle/Tacoma Intl-BFS Belfast Intl
18h 05m2 stops Reykjavik Keflavik Intl London Gatwick
£708Multiple Airlines
Tue, 29 Sep - Tue, 6 Oct
Multiple Airlines Logo
08:20 - 20:40BFS  Belfast Intl-SEA Seattle/Tacoma Intl
20h 20m2 stops London Gatwick Reykjavik Keflavik Intl
Multiple Airlines Logo
19:00 - 21:05SEA  Seattle/Tacoma Intl-BFS Belfast Intl
18h 05m2 stops Reykjavik Keflavik Intl London Gatwick
£711Multiple Airlines
Tue, 29 Sep - Tue, 6 Oct
British Airways Logo
20:00 - 16:50BHD  Belfast City-SEA Seattle/Tacoma Intl
28h 50m1 stop London Heathrow
British Airways Logo
18:45 - 17:25SEA  Seattle/Tacoma Intl-BHD Belfast City
14h 40m1 stop London Heathrow
£722British Airways
Thu, 5 Nov - Mon, 9 Nov
British Airways Logo
20:00 - 16:50BHD  Belfast City-SEA Seattle/Tacoma Intl
28h 50m1 stop London Heathrow
British Airways Logo
18:45 - 17:25SEA  Seattle/Tacoma Intl-BHD Belfast City
14h 40m1 stop London Heathrow
£723British Airways
Thu, 5 Nov - Mon, 9 Nov
British Airways Logo
20:00 - 16:50BHD  Belfast City-SEA Seattle/Tacoma Intl
28h 50m1 stop London Heathrow
British Airways Logo
18:45 - 17:25SEA  Seattle/Tacoma Intl-BHD Belfast City
14h 40m1 stop London Heathrow
£723British Airways
Thu, 5 Nov - Mon, 9 Nov
British Airways Logo
09:35 - 20:15BHD  Belfast City-SEA Seattle/Tacoma Intl
18h 40m2 stops London Heathrow Chicago O'Hare Intl
British Airways Logo
10:31 - 15:30SEA  Seattle/Tacoma Intl-BHD Belfast City
20h 59m2 stops Chicago O'Hare Intl London Heathrow
£727British Airways
Thu, 15 Oct - Mon, 19 Oct

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British Airways flights from Belfast to Seattle

Our best British Airways deals on Belfast to Seattle flight tickets
British Airways
5 Nov
BHD06:30Belfast City
12h 55m
1 stop
SEA11:25Seattle/Tacoma Intl
9 Nov
SEA10:41Seattle/Tacoma Intl
21h 24m
2 stops
BHD16:05Belfast City
£722
British Airways
5 Nov
BHD20:00Belfast City
28h 50m
1 stop
SEA16:50Seattle/Tacoma Intl
9 Nov
SEA18:45Seattle/Tacoma Intl
14h 40m
1 stop
BHD17:25Belfast City
£722
British Airways
5 Nov
BHD20:00Belfast City
28h 50m
1 stop
SEA16:50Seattle/Tacoma Intl
9 Nov
SEA18:45Seattle/Tacoma Intl
14h 40m
1 stop
BHD17:25Belfast City
£723

KLM flights from Belfast to Seattle

Our best KLM deals on Belfast to Seattle flight tickets
KLM
20 Aug
BHD09:50Belfast City
14h 37m
1 stop
SEA16:27Seattle/Tacoma Intl
24 Aug
SEA13:33Seattle/Tacoma Intl
19h 22m
2 stops
BHD16:55Belfast City
£5,874
KLM
20 Aug
BHD09:50Belfast City
14h 37m
1 stop
SEA16:27Seattle/Tacoma Intl
24 Aug
SEA13:33Seattle/Tacoma Intl
19h 22m
2 stops
BHD16:55Belfast City
£5,893

momondo Fare Finder

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

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Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Mon 5/10

11:35-11:35

1 stop32h 00m

Seattle/Tacoma Intl

Thu 22/10

13:30-10:10

1 stop12h 40m

£641
Fastest return journey

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Mon 5/10

11:35-00:36

2 stops21h 01m

Seattle/Tacoma Intl

Thu 22/10

15:14-15:30

2 stops16h 16m

£645

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Mon 5/10

06:40-22:42

3 stops24h 02m

Seattle/Tacoma Intl

Thu 22/10

19:00-23:05

2 stops20h 05m

£700

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Mon 5/10

06:40-22:42

3 stops24h 02m

Seattle/Tacoma Intl

Thu 22/10

19:00-23:25

3 stops20h 25m

£704

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Tue 29/9

06:15-09:40

3 stops35h 25m

Seattle/Tacoma Intl

Tue 6/10

19:00-21:05

2 stops18h 05m

£708

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Tue 29/9

08:20-20:40

2 stops20h 20m

Seattle/Tacoma Intl

Tue 6/10

19:00-21:05

2 stops18h 05m

£711

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 5/11

20:00-16:50

1 stop28h 50m

Seattle/Tacoma Intl

Mon 9/11

18:45-17:25

1 stop14h 40m

£722

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 5/11

20:00-16:50

1 stop28h 50m

Seattle/Tacoma Intl

Mon 9/11

18:45-17:25

1 stop14h 40m

£722

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 5/11

20:00-16:50

1 stop28h 50m

Seattle/Tacoma Intl

Mon 9/11

18:45-17:25

1 stop14h 40m

£723

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 15/10

09:35-20:15

2 stops18h 40m

Seattle/Tacoma Intl

Mon 19/10

10:31-15:30

2 stops20h 59m

£727

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Belfast to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Belfast to Seattle/Tacoma Intl?

Aer Lingus and British Airways are the most popular carriers operating from Belfast to Seattle/Tacoma Intl

Cheap Belfast to Seattle flight deals and tips

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

Best price found

£458

Fastest flight time

13h 05m

Direct flights

None
The best one-way flight to Seattle from Belfast in the past 72 hours is £458. The best return flight deal from Belfast to Seattle found on momondo in the last 72 hours is £641.
The fastest flight from Belfast to Seattle takes 13h 05m
There are no direct flights from Belfast to Seattle. There are no popular flight routes from Belfast to Seattle.
Search flight deals

Frequently asked questions about flying from Belfast to Seattle

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

    Seattle/Tacoma Intl is 4463.0 mi away from Belfast. By plane, this route typically takes 13h 05m.

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

    Prices for flights from Belfast to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Belfast to Seattle/Tacoma Intl Airport.

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

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near Seattle?

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

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Belfast to Seattle. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Seattle from Belfast which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to Seattle from Belfast. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Seattle from Belfast. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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