Find Cheap Flights from Seattle to London Heathrow

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 Seattle to London Heathrow

(Round-trip)
Depart: Sun Oct 1 2017 Return: Mon Oct 9 2017 Trip spans 9 days
Major Airline
Major Airline
SEA
LHR
9h 10m
nonstop
LHR
SEA
9h 40m
nonstop
Depart: Sun Aug 6 2017 Return: Wed Aug 30 2017 Trip spans 25 days
Air Canada
Air Canada
SEA
LHR
17h 45m
1 stop
LHR
SEA
22h 09m
2 stops
Depart: Sat Aug 26 2017 Return: Tue Sep 5 2017 Trip spans 11 days
Multiple Airlines
Multiple Airlines
SEA
LHR
32h 45m
2 stops
LHR
SEA
16h 55m
1 stop
Depart: Thu Nov 2 2017 Return: Fri Nov 10 2017 Trip spans 9 days
Icelandair
Icelandair
SEA
LHR
11h 50m
1 stop
LHR
SEA
12h 25m
1 stop
Depart: Sat Dec 30 2017 Return: Mon Jan 8 2018 Trip spans 10 days
United
United
SEA
LHR
22h 50m
1 stop
LHR
SEA
17h 48m
1 stop
Depart: Sun Dec 24 2017 Return: Fri Jan 5 2018 Trip spans 13 days
Austrian Airlines
Austrian Airlines
SEA
LHR
14h 40m
1 stop
LHR
SEA
20h 55m
1 stop
Depart: Mon Nov 6 2017 Return: Fri Nov 17 2017 Trip spans 12 days
Major Airline
Major Airline
SEA
LHR
9h 30m
nonstop
LHR
SEA
9h 50m
nonstop
Depart: Mon Nov 20 2017 Return: Sun Nov 26 2017 Trip spans 7 days
Major Airline
Major Airline
SEA
LHR
9h 30m
nonstop
LHR
SEA
9h 50m
nonstop
Depart: Tue Aug 15 2017 Return: Wed Aug 30 2017 Trip spans 16 days
Air Canada
Air Canada
SEA
LHR
17h 45m
1 stop
LHR
SEA
22h 09m
2 stops
Depart: Fri Dec 1 2017 Return: Mon Dec 11 2017 Trip spans 11 days
Major Airline
Major Airline
SEA
LHR
9h 20m
nonstop
LHR
SEA
9h 50m
nonstop
Depart: Sat Dec 23 2017 Return: Sun Jan 7 2018 Trip spans 16 days
United
United
SEA
LHR
29h 05m
1 stop
LHR
SEA
19h 19m
1 stop
Depart: Wed Sep 27 2017 Return: Wed Oct 4 2017 Trip spans 8 days
Major Airline
Major Airline
SEA
LHR
9h 10m
nonstop
LHR
SEA
9h 40m
nonstop
Depart: Thu Oct 19 2017 Return: Mon Oct 30 2017 Trip spans 12 days
Major Airline
Major Airline
SEA
LHR
9h 30m
nonstop
LHR
SEA
9h 50m
nonstop
Depart: Sun Aug 27 2017 Return: Mon Sep 4 2017 Trip spans 9 days
Multiple Airlines
Multiple Airlines
SEA
LHR
17h 45m
1 stop
LHR
SEA
36h 38m
1 stop
Depart: Fri Oct 20 2017 Return: Sun Oct 29 2017 Trip spans 10 days
Major Airline
Major Airline
SEA
LHR
9h 10m
nonstop
LHR
SEA
9h 50m
nonstop
Depart: Tue Aug 15 2017 Return: Thu Sep 7 2017 Trip spans 24 days
Major Airline
Major Airline
SEA
LHR
17h 57m
2 stops
LHR
SEA
21h 19m
2 stops
Depart: Wed Sep 27 2017 Return: Mon Oct 2 2017 Trip spans 6 days
Major Airline
Major Airline
SEA
LHR
9h 10m
nonstop
LHR
SEA
9h 55m
nonstop
Depart: Sun Jun 25 2017 Return: Tue Jul 4 2017 Trip spans 10 days
$1144
Select
Multiple Airlines
Multiple Airlines
SEA
LHR
47h 20m
4 stops
LHR
SEA
43h 18m
3 stops
Depart: Thu Sep 28 2017 Return: Tue Oct 10 2017 Trip spans 13 days
Major Airline
Major Airline
SEA
LHR
9h 30m
nonstop
LHR
SEA
9h 40m
nonstop
Depart: Sun Jul 2 2017 Return: Fri Jul 14 2017 Trip spans 13 days
$1450
Select
Multiple Airlines
Multiple Airlines
SEA
LHR
31h 30m
2 stops
LHR
SEA
17h 45m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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

Seattle
$550
Destination

London
$550