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London To Seattle Flights

  • One-Way
  • Round-Trip
  • Multi-City

From

Indira Gandhi International Airport

To

Chhatrapati Shivaji International Airport

DEPARTURE DATE

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Friday

Return Date

Book a round trip
to save more

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TRAVELLER & CLASS

1 Traveller

Economy

April
August
September
October
November
December
January
February
March

April is by far the best month, wherein you can get cheapest flights for London to Seattle. Meanwhile, is perceived as the expensive month due to the varying factors. That’s why it’s highly advised to make advanced online flight booking to save huge amounts of money.

disclDisclaimer - All the mentioned fares were found within last 48 hrs. The displayed fares are based on historical data and are subject to change. The fares cannot be guaranteed at the time of booking.

Best Flight From London To Seattle

Icelandair
Icelandair

London

13:05

London Heathrow Airport [LHR]

Tue , 28 Apr 2026

12h 50m
ellipse
1 Stop

Seattle

17:55

Seattle Tacoma International Airport [SEA]

Tue, 28 Apr 2026

$471
Icelandair
Icelandair

London

21:25

London Heathrow Airport [LHR]

Sun , 03 May 2026

28h 30m
ellipse
1 Stop

Seattle

17:55

Seattle Tacoma International Airport [SEA]

Mon, 04 May 2026

$482
Icelandair
Icelandair

London

13:05

London Heathrow Airport [LHR]

Wed , 29 Apr 2026

12h 50m
ellipse
1 Stop

Seattle

17:55

Seattle Tacoma International Airport [SEA]

Wed, 29 Apr 2026

$490
United Airlines
United Airlines

London

09:00

London Heathrow Airport [LHR]

Wed , 22 Apr 2026

15h 59m
ellipse
1 Stop

Seattle

16:59

Seattle Tacoma International Airport [SEA]

Wed, 22 Apr 2026

$504
United Airlines
United Airlines

London

10:50

London Heathrow Airport [LHR]

Wed , 15 Apr 2026

14h 09m
ellipse
1 Stop

Seattle

16:59

Seattle Tacoma International Airport [SEA]

Wed, 15 Apr 2026

$504
Lufthansa
Lufthansa

London

06:55

London Heathrow Airport [LHR]

Wed , 22 Apr 2026

18h 04m
ellipse
1 Stop

Seattle

16:59

Seattle Tacoma International Airport [SEA]

Wed, 22 Apr 2026

$504
American Airlines
American Airlines

London

08:15

London Heathrow Airport [LHR]

Wed , 22 Apr 2026

21h 08m
ellipse
2 Stop

Seattle

21:23

Seattle Tacoma International Airport [SEA]

Wed, 22 Apr 2026

$506
American Airlines
American Airlines

London

08:15

London Heathrow Airport [LHR]

Wed , 29 Apr 2026

21h 08m
ellipse
2 Stop

Seattle

21:23

Seattle Tacoma International Airport [SEA]

Wed, 29 Apr 2026

$506
United Airlines
United Airlines

London

06:50

London Heathrow Airport [LHR]

Wed , 22 Apr 2026

17h 51m
ellipse
2 Stop

Seattle

16:41

Seattle Tacoma International Airport [SEA]

Wed, 22 Apr 2026

$515
Lufthansa
Lufthansa

London

20:25

London Heathrow Airport [LHR]

Tue , 05 May 2026

28h 34m
ellipse
1 Stop

Seattle

16:59

Seattle Tacoma International Airport [SEA]

Wed, 06 May 2026

$515
Lufthansa
Lufthansa

London

20:25

London Heathrow Airport [LHR]

Tue , 21 Apr 2026

28h 34m
ellipse
1 Stop

Seattle

16:59

Seattle Tacoma International Airport [SEA]

Wed, 22 Apr 2026

$515
ellipse

Early Morning Flight London to Seattle

wallet
Cheapest Flight
Found
$515
group
Average Flight
Time
17h 51m
calendra
Date/Time
22 Apr 2026
06:50 AM
plane
Airlines
United Airlines
Ellipse

Late Night Flight London to Seattle

wallet
Cheapest Flight
Found
$482
group
Average Flight
Time
28h 30m
calendar
Date/Time
03 May 2026
21:25 PM
plane
Airlines
Icelandair