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.

$755 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.

6:55 am - 9:32 amBFS Belfast Intl-SEA Seattle/Tacoma Intl

34h 37m3 stops Paris Charles de Gaulle Calgary Vancouver Intl

2:35 pm - 10:35 pmSEA Seattle/Tacoma Intl-BFS Belfast Intl

24h 00m2 stops Reykjavik Keflavik Intl Manchester

$755Multiple Airlines

Wed, Nov 18 - Fri, Dec 11

9:15 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

15h 35m1 stop London Heathrow

6:45 pm - 5:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

14h 40m1 stop London Heathrow

$755British Airways

Wed, Nov 18 - Fri, Dec 11

5:35 pm - 11:25 amBHD Belfast City-SEA Seattle/Tacoma Intl

25h 50m1 stop London Heathrow

9:15 am - 10:55 amSEA Seattle/Tacoma Intl-BHD Belfast City

17h 40m2 stops Philadelphia London Heathrow

$758British Airways

Wed, Nov 18 - Fri, Dec 11

12:20 pm - 12:35 amBHD Belfast City-SEA Seattle/Tacoma Intl

20h 15m2 stops London Heathrow Chicago O'Hare Intl

6:14 am - 10:55 amSEA Seattle/Tacoma Intl-BHD Belfast City

20h 41m2 stops Chicago O'Hare Intl London Heathrow

$772British Airways

Wed, Nov 18 - Fri, Dec 11

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

10:31 am - 3:30 pmSEA Seattle/Tacoma Intl-BHD Belfast City

20h 59m2 stops Chicago O'Hare Intl London Heathrow

$801British Airways

Thu, Oct 15 - Mon, Oct 19

6:55 am - 9:32 amBFS Belfast Intl-SEA Seattle/Tacoma Intl

34h 37m3 stops Paris Charles de Gaulle Calgary Vancouver Intl

2:35 pm - 10:35 pmSEA Seattle/Tacoma Intl-BFS Belfast Intl

24h 00m3 stops Reykjavik Keflavik Intl Berlin Brandenburg Manchester

$802Multiple Airlines

Wed, Nov 18 - Fri, Dec 11

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

23h 00m1 stop London Heathrow

3:14 pm - 3:30 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 16m2 stops Chicago O'Hare Intl London Heathrow

$805British Airways

Thu, Oct 15 - Mon, Oct 19

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

23h 00m1 stop London Heathrow

10:31 am - 3:30 pmSEA Seattle/Tacoma Intl-BHD Belfast City

20h 59m2 stops Chicago O'Hare Intl London Heathrow

$807British Airways

Thu, Oct 15 - Mon, Oct 19

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

23h 00m1 stop London Heathrow

10:31 am - 3:30 pmSEA Seattle/Tacoma Intl-BHD Belfast City

20h 59m2 stops Chicago O'Hare Intl London Heathrow

$808British Airways

Thu, Oct 15 - Mon, Oct 19

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

23h 00m1 stop London Heathrow

3:14 pm - 3:30 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 16m2 stops Chicago O'Hare Intl London Heathrow

$810British Airways

Thu, Oct 15 - Mon, Oct 19

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British Airways flights from Belfast to Seattle

Our best British Airways deals on Belfast to Seattle flight tickets

British Airways

Nov 18

BHD9:15 amBelfast City

15h 35m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

Dec 11

SEA6:45 pmSeattle/Tacoma Intl

14h 40m

1 stop

BHD5:25 pmBelfast City

$755

British Airways

Nov 18

BHD5:35 pmBelfast City

25h 50m

1 stop

SEA11:25 amSeattle/Tacoma Intl

Dec 11

SEA9:15 amSeattle/Tacoma Intl

17h 40m

2 stops

BHD10:55 amBelfast City

$758

British Airways

Nov 18

BHD12:20 pmBelfast City

20h 15m

2 stops

SEA12:35 amSeattle/Tacoma Intl

Dec 11

SEA6:14 amSeattle/Tacoma Intl

20h 41m

2 stops

BHD10:55 amBelfast City

$772

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Wed 11/18

6:55 am-9:32 am

3 stops34h 37m

Seattle/Tacoma Intl

Fri 12/11

2:35 pm-10:35 pm

2 stops24h 00m

$755

Quickest round-trip

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 11/18

9:15 am-4:50 pm

1 stop15h 35m

Seattle/Tacoma Intl

Fri 12/11

6:45 pm-5:25 pm

1 stop14h 40m

$755

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 11/18

5:35 pm-11:25 am

1 stop25h 50m

Seattle/Tacoma Intl

Fri 12/11

9:15 am-10:55 am

2 stops17h 40m

$758

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 11/18

12:20 pm-12:35 am

2 stops20h 15m

Seattle/Tacoma Intl

Fri 12/11

6:14 am-10:55 am

2 stops20h 41m

$772

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 10/15

12:45 pm-6:25 pm

1 stop13h 40m

Seattle/Tacoma Intl

Mon 10/19

10:31 am-3:30 pm

2 stops20h 59m

$801

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Wed 11/18

6:55 am-9:32 am

3 stops34h 37m

Seattle/Tacoma Intl

Fri 12/11

2:35 pm-10:35 pm

3 stops24h 00m

$802

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 10/15

8:35 pm-11:35 am

1 stop23h 00m

Seattle/Tacoma Intl

Mon 10/19

3:14 pm-3:30 pm

2 stops16h 16m

$805

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 10/15

8:35 pm-11:35 am

1 stop23h 00m

Seattle/Tacoma Intl

Mon 10/19

10:31 am-3:30 pm

2 stops20h 59m

$807

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 10/15

8:35 pm-11:35 am

1 stop23h 00m

Seattle/Tacoma Intl

Mon 10/19

10:31 am-3:30 pm

2 stops20h 59m

$808

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 10/15

8:35 pm-11:35 am

1 stop23h 00m

Seattle/Tacoma Intl

Mon 10/19

3:14 pm-3:30 pm

2 stops16h 16m

$810

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	$755
Fastest flight time	13h 40m
Direct flights	None

The best flight deal from Belfast to Seattle found on momondo in the last 72 hours is $755

The fastest flight from Belfast to Seattle takes 13h 40m

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 13h 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 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

Kent

Olympia

Redmond

Lakewood

Federal Way

Fife

Puyallup

Tukwila

Lynnwood

Cle Elum

Marysville

Lacey

Kirkland

Centralia

Shoreline

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