Flights from London to Seattle available from GBP 395*

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Our best rates from London to Seattle

Apr 2025
FromGBP 663*
Fare: Round trip/Economy
Displaying fares for April-2025
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*Fares displayed have been collected within the last 72hrs and may no longer be available at the time of booking

Fly in the next three months: flights from London to Seattle

GBP

London (LGW)to

Seattle (SEA)
04 05 2025 - 08 05 2025
From
GBP 395
Round trip
/
Economy

London (LGW)to

Seattle (SEA)
09 07 2025 - 27 07 2025
From
GBP 523
Round trip
/
Economy

London (LGW)to

Seattle (SEA)
03 05 2025 - 07 05 2025
From
GBP 643
Round trip
/
Economy

London (LGW)to

Seattle (SEA)
20 05 2025 - 22 06 2025
From
GBP 856
Round trip
/
Economy

London (LON)to

Seattle (SEA)
06 05 2025 - 15 05 2025
From
GBP 395
Round trip
/
Economy

London (LON)to

Seattle (SEA)
07 05 2025 - 13 05 2025
From
GBP 395
Round trip
/
Economy

London (LON)to

Seattle (SEA)
07 05 2025 - 16 05 2025
From
GBP 395
Round trip
/
Economy

London (LON)to

Seattle (SEA)
08 05 2025 - 13 05 2025
From
GBP 395
Round trip
/
Economy

London (LON)to

Seattle (SEA)
08 05 2025 - 15 05 2025
From
GBP 395
Round trip
/
Economy

London (LON)to

Seattle (SEA)
08 05 2025 - 16 05 2025
From
GBP 395
Round trip
/
Economy

London (LON)to

Seattle (SEA)
09 05 2025 - 14 05 2025
From
GBP 395
Round trip
/
Economy

London (LON)to

Seattle (SEA)
13 05 2025 - 16 05 2025
From
GBP 395
Round trip
/
Economy

*Fares displayed have been collected within the last 72hrs and may no longer be available at the time of booking. We display fares for Economy Light as standard but it is possible to change your class of service during the booking process. You can also add baggage, meals and extra legroom to your trip during booking.

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Plan ahead for your trip from London to Seattle with Icelandair

GBP
Plan ahead for your trip from London to Seattle with Icelandair
From
To
Fare type
Dates
Price
London (LON)Seattle (SEA)Round trip
/
Economy		12 01 2026 - 11 02 2026

From

GBP 476

Viewed 1 day ago

London (LON)Seattle (SEA)Round trip
/
Economy		13 01 2026 - 21 01 2026

From

GBP 476

Viewed 1 day ago

London (LON)Seattle (SEA)Round trip
/
Economy		13 01 2026 - 22 01 2026

From

GBP 476

Viewed 1 day ago

London (LON)Seattle (SEA)Round trip
/
Economy		13 01 2026 - 04 02 2026

From

GBP 476

Viewed 1 day ago

London (LON)Seattle (SEA)Round trip
/
Economy		28 01 2026 - 05 02 2026

From

GBP 476

Viewed 1 day ago

London (LON)Seattle (SEA)Round trip
/
Economy		28 01 2026 - 10 02 2026

From

GBP 476

Viewed 1 day ago

London (LON)Seattle (SEA)Round trip
/
Economy		28 01 2026 - 16 02 2026

From

GBP 476

Viewed 1 day ago

London (LON)Seattle (SEA)Round trip
/
Economy		28 01 2026 - 24 02 2026

From

GBP 476

Viewed 1 day ago

London (LON)Seattle (SEA)Round trip
/
Economy		28 01 2026 - 26 02 2026

From

GBP 476

Viewed 1 day ago

*Fares displayed have been collected within the last 72hrs and may no longer be available at the time of booking. We display fares for Economy Light as standard but it is possible to change your class of service during the booking process. You can also add baggage, meals and extra legroom to your trip during booking.

Flights to Seattle from London

For the best fares and an unparalleled flying experience, choose Icelandair to fly from London (LHR/LGW) to Seattle (SEA).

Icelandair provides hundreds of hours of movies and music in our in-flight entertainment system, Wi-Fi access on most flights, and a USB power port at every seat to power up your laptop or smartphone.

 

FAQs about travel from London to Seattle

Helpful information for travellers visiting Seattle

What is the flight time from London to Seattle?

The flight duration from London Heathrow (LHR) to Seattle (SEA) is roughly 9-10 hours non-stop, though this does not account for any layovers you have planned.

Our in-flight entertainment will make your journey fly by, and our abundance of charging points means that you can land in Seattle raring to go!

What is the flight distance from London to Seattle Tacoma Airport?

The distance from London to Seattle is around 4,787 miles or 7,704 kilometres. Please note that the actual flight distance may differ based on the specific airline’s route as well as other factors.

How can I get the cheapest flights to Seattle from London?

Being flexible on when you book your flights, as well as which airport in London you fly from can help you find cheap flights from London to Seattle. We also advise booking your holiday in advance and checking our flight deals regularly to secure the best price.

Does Icelandair offer direct flights to Seattle from London?

Passengers flying to Seattle from London with Icelandair will change at Keflavík International Airport before their onward journey to Seattle. The flight time from Keflavík to Seattle is around 7-8 hours.

Which London airports offer Icelandair flights to Seattle?

Passengers travelling from London to Seattle with Icelandair can fly from either London Heathrow Airport or London Gatwick Airport. Use the flight finder tool above to choose flights from your preferred airport.

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