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 many operators does momondo search for flights from Belfast to Seattle/Tacoma Intl Airport?

As of January 2026, there are 2 operators available to choose from for flights from Belfast to Seattle/Tacoma Intl Airport.

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.

£528 Cheap Flights from Belfast to Seattle in 2026

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Find the cheapest flights from Belfast to Seattle

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

11:25 - 16:55

BHD

SEA

13h 30m1 stop

14:10 - 10:40

SEA

BHD

36h 30m2 stops

£528British Airways

Wed, 4 Feb - Sun, 8 Feb

12:25 - 16:55

BHD

SEA

12h 30m1 stop

14:10 - 10:40

SEA

BHD

36h 30m2 stops

£530British Airways

Wed, 4 Feb - Sun, 8 Feb

06:35 - 22:07

BHD

SEA

23h 32m2 stops

14:10 - 10:40

SEA

BHD

36h 30m2 stops

£531British Airways

Wed, 4 Feb - Sun, 8 Feb

06:35 - 22:07

BHD

SEA

23h 32m2 stops

14:10 - 10:40

SEA

BHD

36h 30m2 stops

£533British Airways

Wed, 4 Feb - Sun, 8 Feb

09:15 - 16:55

BHD

SEA

15h 40m1 stop

07:15 - 10:40

SEA

BHD

20h 25m2 stops

£535British Airways

Sat, 7 Mar - Mon, 9 Mar

06:35 - 11:30

BHD

SEA

12h 55m1 stop

19:50 - 18:35

SEA

BHD

15h 45m1 stop

£536British Airways

Sat, 7 Mar - Mon, 9 Mar

06:35 - 16:55

BHD

SEA

18h 20m1 stop

13:37 - 14:15

SEA

BHD

17h 38m2 stops

£537British Airways

Sat, 7 Mar - Mon, 9 Mar

09:15 - 23:04

BHD

SEA

21h 49m2 stops

13:37 - 18:35

SEA

BHD

21h 58m2 stops

£539British Airways

Sat, 7 Mar - Mon, 9 Mar

06:30 - 09:15

BFS

SEA

34h 45m3 stops

14:35 - 21:05

SEA

BFS

22h 30m3 stops

£669Multiple Airlines

Wed, 28 Jan - Thu, 29 Jan

06:30 - 22:16

BFS

SEA

23h 46m2 stops

14:35 - 21:05

SEA

BFS

22h 30m3 stops

£734Multiple Airlines

Wed, 28 Jan - Thu, 29 Jan

British Airways flights from Belfast to Seattle

Our best British Airways deals on Belfast to Seattle flight tickets

British Airways

4 Feb

BHD11:25Belfast City

13h 30m

1 stop

SEA16:55Seattle/Tacoma Intl

8 Feb

SEA14:10Seattle/Tacoma Intl

36h 30m

2 stops

BHD10:40Belfast City

£528

British Airways

4 Feb

BHD12:25Belfast City

12h 30m

1 stop

SEA16:55Seattle/Tacoma Intl

8 Feb

SEA14:10Seattle/Tacoma Intl

36h 30m

2 stops

BHD10:40Belfast City

£530

British Airways

4 Feb

BHD06:35Belfast City

23h 32m

2 stops

SEA22:07Seattle/Tacoma Intl

8 Feb

SEA14:10Seattle/Tacoma Intl

36h 30m

2 stops

BHD10:40Belfast City

£531

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

11:25-16:55

1 stop13h 30m

Seattle/Tacoma Intl

Sun 8/2

14:10-10:40

2 stops36h 30m

£528

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

12:25-16:55

1 stop12h 30m

Seattle/Tacoma Intl

Sun 8/2

14:10-10:40

2 stops36h 30m

£530

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

Sun 8/2

14:10-10:40

2 stops36h 30m

£531

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

Sun 8/2

14:10-10:40

2 stops36h 30m

£533

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

09:15-16:55

1 stop15h 40m

Seattle/Tacoma Intl

Mon 9/3

07:15-10:40

2 stops20h 25m

£535

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

06:35-11:30

1 stop12h 55m

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

£536

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

06:35-16:55

1 stop18h 20m

Seattle/Tacoma Intl

Mon 9/3

13:37-14:15

2 stops17h 38m

£537

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

09:15-23:04

2 stops21h 49m

Seattle/Tacoma Intl

Mon 9/3

13:37-18:35

2 stops21h 58m

£539

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 28/1

06:30-09:15

3 stops34h 45m

Seattle/Tacoma Intl

Thu 29/1

14:35-21:05

3 stops22h 30m

£669

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 28/1

06:30-22:16

2 stops23h 46m

Seattle/Tacoma Intl

Thu 29/1

14:35-21:05

3 stops22h 30m

£734

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

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?

American Airlines is the most popular carrier 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

Fastest flight time	15h 40m
Direct flights	None

The fastest flight from Belfast to Seattle takes 15h 40m

There are no direct flights from Belfast to Seattle. There are no popular flight routes from Belfast to Seattle.

Search flight deals

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 15h 40m.
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 many operators does momondo search for flights from Belfast to Seattle/Tacoma Intl Airport?
As of January 2026, there are 2 operators available to choose from for flights from Belfast to Seattle/Tacoma Intl Airport.
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.

Best airlines flying from Belfast to Seattle

Compare and see reviews for airlines that fly from Belfast to Seattle with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom £438	Free Cancellation	Rating 6.7 7,657 reviews		Search British Airways flights
American Airlines	PriceFrom £559	Free Cancellation	Rating 7.2 11,095 reviews		Search American Airlines flights

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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?

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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.