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.

$565 Cheap Flights from Belfast to Seattle in 2026/27

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.

6:35 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

18h 15m1 stop London Heathrow

10:31 am - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

22h 19m2 stops Chicago O'Hare Intl London Heathrow

$1,011Iberia

Wed, Feb 17 - Sun, Feb 21

6:35 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

18h 15m1 stop London Heathrow

10:31 am - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

22h 19m2 stops Chicago O'Hare Intl London Heathrow

$1,015Iberia

Wed, Feb 17 - Sun, Feb 21

9:15 am - 12:34 amBHD Belfast City-SEA Seattle/Tacoma Intl

23h 19m2 stops London Heathrow Chicago O'Hare Intl

10:31 am - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

22h 19m2 stops Chicago O'Hare Intl London Heathrow

$1,016Iberia

Wed, Feb 17 - Sun, Feb 21

6:35 am - 12:34 amBHD Belfast City-SEA Seattle/Tacoma Intl

25h 59m2 stops London Heathrow Chicago O'Hare Intl

10:31 am - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

22h 19m2 stops Chicago O'Hare Intl London Heathrow

$1,020Iberia

Wed, Feb 17 - Sun, Feb 21

2:10 pm - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

34h 40m1 stop London Heathrow

6:00 am - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

26h 50m2 stops Chicago O'Hare Intl London Heathrow

$1,022Iberia

Thu, Jan 21 - Sun, Jan 24

5:50 pm - 12:43 amBHD Belfast City-SEA Seattle/Tacoma Intl

38h 53m2 stops London Heathrow Chicago O'Hare Intl

9:58 am - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

22h 52m2 stops Chicago O'Hare Intl London Heathrow

$1,027Iberia

Thu, Jan 21 - Sun, Jan 24

8:35 pm - 11:35 amBHD Belfast City-SEA Seattle/Tacoma Intl

23h 00m1 stop London Heathrow

5:40 pm - 8:35 pmSEA Seattle/Tacoma Intl-BHD Belfast City

18h 55m2 stops Helsinki-Vantaa London Heathrow

$1,030British Airways

Wed, May 5 - Sun, May 9

7:40 pm - 11:35 amBHD Belfast City-SEA Seattle/Tacoma Intl

23h 55m1 stop London Heathrow

1:35 pm - 10:30 amSEA Seattle/Tacoma Intl-BHD Belfast City

12h 55m1 stop London Heathrow

$1,031British Airways

Wed, May 5 - Sun, May 9

11:35 am - 12:36 amBHD Belfast City-SEA Seattle/Tacoma Intl

21h 01m2 stops London Heathrow Chicago O'Hare Intl

10:27 am - 5:40 pmSEA Seattle/Tacoma Intl-BHD Belfast City

23h 13m2 stops Chicago O'Hare Intl London Heathrow

$1,032Iberia

Wed, May 5 - Sun, May 9

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Iberia flights from Belfast to Seattle

Our best Iberia deals on Belfast to Seattle flight tickets

Iberia

Feb 17

BHD6:35 amBelfast City

18h 15m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

Feb 21

SEA10:31 amSeattle/Tacoma Intl

22h 19m

2 stops

BHD4:50 pmBelfast City

$1,011

Iberia

Feb 17

BHD6:35 amBelfast City

18h 15m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

Feb 21

SEA10:31 amSeattle/Tacoma Intl

22h 19m

2 stops

BHD4:50 pmBelfast City

$1,015

Iberia

Feb 17

BHD9:15 amBelfast City

23h 19m

2 stops

SEA12:34 amSeattle/Tacoma Intl

Feb 21

SEA10:31 amSeattle/Tacoma Intl

22h 19m

2 stops

BHD4:50 pmBelfast City

$1,016

British Airways flights from Belfast to Seattle

Our best British Airways deals on Belfast to Seattle flight tickets

British Airways

May 5

BHD8:35 pmBelfast City

23h 00m

1 stop

SEA11:35 amSeattle/Tacoma Intl

May 9

SEA5:40 pmSeattle/Tacoma Intl

18h 55m

2 stops

BHD8:35 pmBelfast City

$1,030

British Airways

May 5

BHD7:40 pmBelfast City

23h 55m

1 stop

SEA11:35 amSeattle/Tacoma Intl

May 9

SEA1:35 pmSeattle/Tacoma Intl

12h 55m

1 stop

BHD10:30 amBelfast City

$1,031

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 2/17

6:35 am-4:50 pm

1 stop18h 15m

Seattle/Tacoma Intl

Sun 2/21

10:31 am-4:50 pm

2 stops22h 19m

$1,011

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 2/17

6:35 am-4:50 pm

1 stop18h 15m

Seattle/Tacoma Intl

Sun 2/21

10:31 am-4:50 pm

2 stops22h 19m

$1,015

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 2/17

9:15 am-12:34 am

2 stops23h 19m

Seattle/Tacoma Intl

Sun 2/21

10:31 am-4:50 pm

2 stops22h 19m

$1,016

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 2/17

6:35 am-12:34 am

2 stops25h 59m

Seattle/Tacoma Intl

Sun 2/21

10:31 am-4:50 pm

2 stops22h 19m

$1,020

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 1/21

2:10 pm-4:50 pm

1 stop34h 40m

Seattle/Tacoma Intl

Sun 1/24

6:00 am-4:50 pm

2 stops26h 50m

$1,022

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 1/21

5:50 pm-12:43 am

2 stops38h 53m

Seattle/Tacoma Intl

Sun 1/24

9:58 am-4:50 pm

2 stops22h 52m

$1,027

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 5/5

8:35 pm-11:35 am

1 stop23h 00m

Seattle/Tacoma Intl

Sun 5/9

5:40 pm-8:35 pm

2 stops18h 55m

$1,030

Quickest round-trip

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 5/5

7:40 pm-11:35 am

1 stop23h 55m

Seattle/Tacoma Intl

Sun 5/9

1:35 pm-10:30 am

1 stop12h 55m

$1,031

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 5/5

11:35 am-12:36 am

2 stops21h 01m

Seattle/Tacoma Intl

Sun 5/9

10:27 am-5:40 pm

2 stops23h 13m

$1,032

Cheapest one-way

Quickest one-way

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Fri 3/26

11:50 am-5:50 pm

1 stop13h 00m

$565

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?

British Airways 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

Best Price Found	$565
Fastest flight time	23h 00m
Direct flights	None

The best one-way flight to Seattle from Belfast in the past 72 hours is $565. The best round-trip flight deal from Belfast to Seattle found on momondo in the last 72 hours is $1,011.

The fastest flight from Belfast to Seattle takes 23h 00m

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?
The straight-line distance from Belfast to Seattle/Tacoma Intl is 4463.0 mi. A reasonable flight in good conditions will take 23h 00m.
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.

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Kent

Olympia

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Redmond

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Cle Elum

Marysville

Lacey

Kirkland

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Bothell

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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?

All flight searches from Belfast to Seattle on momondo can be filtered to show those which offer flexible booking policies.

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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?

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.