Find Cheap Flights from London to Seattle

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from London to Seattle

(Round-trip)
Depart: Mon Sep 25 2017 Return: Fri Sep 29 2017 Trip spans 5 days
Norwegian
Norwegian
LGW
SEA
9h 55m
nonstop
SEA
LGW
9h 20m
nonstop
Depart: Fri Nov 17 2017 Return: Sun Nov 26 2017 Trip spans 10 days
Icelandair
Icelandair
LHR
SEA
12h 00m
1 stop
SEA
LHR
11h 45m
1 stop
Depart: Tue Sep 12 2017 Return: Sun Sep 24 2017 Trip spans 13 days
Lufthansa
Lufthansa
LCY
SEA
24h 35m
1 stop
SEA
LCY
18h 20m
1 stop
Depart: Mon Sep 11 2017 Return: Wed Oct 11 2017 Trip spans 31 days
British Airways
British Airways
LHR
SEA
9h 55m
nonstop
SEA
LHR
9h 10m
nonstop
Depart: Fri Nov 17 2017 Return: Tue Nov 21 2017 Trip spans 5 days
Virgin Atlantic
Virgin Atlantic
LGW
SEA
35h 40m
1 stop
SEA
LGW
34h 15m
1 stop
Depart: Sun Oct 22 2017 Return: Fri Oct 27 2017 Trip spans 6 days
Major Airline
Major Airline
LHR
SEA
9h 55m
nonstop
SEA
LHR
9h 10m
nonstop
Depart: Wed Jun 21 2017 Return: Mon Jun 26 2017 Trip spans 6 days
WestJet
WestJet
LGW
SEA
27h 50m
1 stop
SEA
LGW
16h 45m
1 stop
Depart: Wed Jun 21 2017 Return: Mon Jul 3 2017 Trip spans 13 days
Austrian Airlines
Austrian Airlines
LHR
SEA
16h 38m
1 stop
SEA
LHR
15h 55m
1 stop
Depart: Fri Nov 17 2017 Return: Sun Nov 26 2017 Trip spans 10 days
Norwegian
Norwegian
LGW
SEA
9h 55m
nonstop
SEA
LGW
9h 30m
nonstop
Depart: Fri Oct 20 2017 Return: Wed Dec 6 2017 Trip spans 48 days
Norwegian
Norwegian
LGW
SEA
9h 55m
nonstop
SEA
LGW
9h 30m
nonstop
Depart: Wed Jun 14 2017 Return: Fri Jun 30 2017 Trip spans 17 days
$1118
Select
United
United
LHR
SEA
19h 20m
2 stops
SEA
LHR
27h 40m
1 stop
Depart: Fri Aug 25 2017 Return: Mon Sep 11 2017 Trip spans 18 days
British Airways
British Airways
LHR
SEA
9h 55m
nonstop
SEA
LHR
9h 30m
nonstop
Depart: Wed Jul 5 2017 Return: Thu Aug 3 2017 Trip spans 30 days
$1352
Select
Delta
Delta
LHR
SEA
9h 40m
nonstop
SEA
LHR
9h 00m
nonstop
Depart: Fri Nov 17 2017 Return: Tue Nov 21 2017 Trip spans 5 days
British Airways
British Airways
LHR
SEA
9h 50m
nonstop
SEA
LHR
9h 30m
nonstop
Depart: Thu Sep 14 2017 Return: Mon Sep 18 2017 Trip spans 5 days
Virgin Atlantic
Virgin Atlantic
LHR
SEA
9h 40m
nonstop
SEA
LHR
9h 00m
nonstop
Depart: Tue Aug 29 2017 Return: Fri Sep 8 2017 Trip spans 11 days
Icelandair
Icelandair
LGW
SEA
13h 05m
1 stop
SEA
LGW
11h 15m
1 stop
Depart: Wed Aug 23 2017 Return: Sun Sep 3 2017 Trip spans 12 days
$1000
Select
Lufthansa
Lufthansa
LCY
SEA
24h 45m
2 stops
SEA
LCY
42h 09m
2 stops
Depart: Sat Jul 1 2017 Return: Sat Jul 8 2017 Trip spans 8 days
$1004
Select
WestJet
WestJet
LGW
SEA
29h 37m
1 stop
SEA
LGW
30h 00m
1 stop
Depart: Sun Aug 27 2017 Return: Sat Sep 9 2017 Trip spans 14 days
British Airways
British Airways
LHR
SEA
9h 55m
nonstop
SEA
LHR
9h 30m
nonstop
Depart: Sat Aug 12 2017 Return: Sun Aug 27 2017 Trip spans 16 days
$2053
Select
KLM
KLM
LCY
SEA
14h 01m
1 stop
SEA
LCY
15h 17m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

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Airports
Origin

London
only $494
only $513
only $468
Destination

Seattle
$468
Airlines Airline reviews

101 travelers who booked a flight from London to Seattle rated their chosen airlines with an average of 7.7.

Overall
7.9
Boarding
7.8
Crew
8.4
Comfort
7.3
Food
7.5
Entertainment
7.7