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 updated daily.

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

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

The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$426 Cheap Flights from Belfast to Seattle in 2025/26

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0 bags

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Find the cheapest flights from Belfast to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:25 pm - 4:55 pm

BHD

SEA

12h 30m1 stop

7:15 am - 10:20 am

SEA

BHD

20h 05m2 stops

$714British Airways

Wed, Mar 4 - Sun, Mar 8

6:35 am - 4:55 pm

BHD

SEA

18h 20m1 stop

7:50 pm - 4:50 pm

SEA

BHD

14h 00m1 stop

$716British Airways

Wed, Mar 4 - Sun, Mar 8

6:35 am - 6:20 pm

BHD

SEA

19h 45m2 stops

1:37 pm - 4:50 pm

SEA

BHD

20h 13m2 stops

$719British Airways

Wed, Mar 4 - Sun, Mar 8

6:35 am - 6:20 pm

BHD

SEA

19h 45m2 stops

1:37 pm - 1:55 pm

SEA

BHD

17h 18m2 stops

$722British Airways

Wed, Mar 4 - Sun, Mar 8

British Airways flights from Belfast to Seattle

Our best British Airways deals on Belfast to Seattle flight tickets

British Airways

Mar 4

BHD12:25 pmBelfast City

12h 30m

1 stop

SEA4:55 pmSeattle/Tacoma Intl

Mar 8

SEA7:15 amSeattle/Tacoma Intl

20h 05m

2 stops

BHD10:20 amBelfast City

$714

Find similar

British Airways

Mar 4

BHD6:35 amBelfast City

18h 20m

1 stop

SEA4:55 pmSeattle/Tacoma Intl

Mar 8

SEA7:50 pmSeattle/Tacoma Intl

14h 00m

1 stop

BHD4:50 pmBelfast City

$716

Find similar

British Airways

Mar 4

BHD6:35 amBelfast City

19h 45m

2 stops

SEA6:20 pmSeattle/Tacoma Intl

Mar 8

SEA1:37 pmSeattle/Tacoma Intl

20h 13m

2 stops

BHD4:50 pmBelfast City

$719

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 3/4

12:25 pm-4:55 pm

1 stop12h 30m

Seattle/Tacoma Intl

Sun 3/8

7:15 am-10:20 am

2 stops20h 05m

$714

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 3/4

6:35 am-4:55 pm

1 stop18h 20m

Seattle/Tacoma Intl

Sun 3/8

7:50 pm-4:50 pm

1 stop14h 00m

$716

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 3/4

6:35 am-6:20 pm

2 stops19h 45m

Seattle/Tacoma Intl

Sun 3/8

1:37 pm-4:50 pm

2 stops20h 13m

$719

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 3/4

6:35 am-6:20 pm

2 stops19h 45m

Seattle/Tacoma Intl

Sun 3/8

1:37 pm-1:55 pm

2 stops17h 18m

$722

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 2/5

6:30 am-9:15 pm

2 stops46h 45m

$426

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 2/5

2:45 pm-7:52 pm

3 stops37h 07m

$435

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 2/5

5:20 pm-3:00 pm

2 stops29h 40m

$1,692

Flights are sorted by cheapest round-trip flights first.

Sorted 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?

Delta 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	18h 20m
Direct flights	None

The fastest flight from Belfast to Seattle takes 18h 20m

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?
The straight-line distance from Belfast to Seattle/Tacoma Intl is 4463.0 mi. A reasonable flight in good conditions will take 18h 20m.
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 updated daily.
How old do you have to be to fly from Belfast 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 to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Tukwila

Cle Elum

Federal Way

Lakewood

Fife

Centralia

Westport

Kirkland

Shoreline

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

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

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