Find Cheap Flights from London Heathrow 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 Heathrow to Seattle

(Round-trip)
Depart: Fri Oct 27 2017 Return: Sun Nov 5 2017 Trip spans 10 days
Major Airline
Major Airline
LHR
SEA
9h 40m
nonstop
SEA
LHR
9h 30m
nonstop
Depart: Sun Nov 12 2017 Return: Mon Nov 20 2017 Trip spans 9 days
Multiple Airlines
Multiple Airlines
LHR
SEA
13h 20m
1 stop
SEA
LHR
13h 50m
1 stop
Depart: Sun Dec 17 2017 Return: Wed Jan 3 2018 Trip spans 18 days
British Airways
British Airways
LHR
SEA
17h 55m
1 stop
SEA
LHR
13h 31m
1 stop
Depart: Fri Dec 8 2017 Return: Fri Dec 29 2017 Trip spans 22 days
KLM
KLM
LHR
SEA
12h 58m
1 stop
SEA
LHR
16h 22m
1 stop
Depart: Fri Aug 25 2017 Return: Sun Sep 3 2017 Trip spans 10 days
Austrian Airlines
Austrian Airlines
LHR
SEA
22h 58m
1 stop
SEA
LHR
14h 17m
1 stop
Depart: Wed Sep 27 2017 Return: Sun Oct 15 2017 Trip spans 19 days
Multiple Airlines
Multiple Airlines
LHR
SEA
31h 30m
1 stop
SEA
LHR
18h 20m
1 stop
Depart: Mon Dec 18 2017 Return: Wed Jan 3 2018 Trip spans 17 days
British Airways
British Airways
LHR
SEA
16h 24m
1 stop
SEA
LHR
13h 31m
1 stop
Depart: Fri Nov 17 2017 Return: Mon Nov 27 2017 Trip spans 11 days
Multiple Airlines
Multiple Airlines
LHR
SEA
13h 20m
1 stop
SEA
LHR
13h 00m
1 stop
Depart: Fri Jul 14 2017 Return: Wed Jul 19 2017 Trip spans 6 days
$1149
Select
Lufthansa
Lufthansa
LHR
SEA
16h 30m
1 stop
SEA
LHR
15h 20m
1 stop
Depart: Fri Sep 29 2017 Return: Fri Oct 13 2017 Trip spans 15 days
Multiple Airlines
Multiple Airlines
LHR
SEA
34h 18m
1 stop
SEA
LHR
9h 30m
nonstop
Depart: Wed Dec 13 2017 Return: Wed Jan 3 2018 Trip spans 22 days
Multiple Airlines
Multiple Airlines
LHR
SEA
15h 38m
1 stop
SEA
LHR
13h 31m
1 stop
Depart: Sat Oct 7 2017 Return: Sun Oct 22 2017 Trip spans 16 days
Multiple Airlines
Multiple Airlines
LHR
SEA
25h 20m
1 stop
SEA
LHR
13h 30m
1 stop
Depart: Sun Jul 16 2017 Return: Wed Aug 16 2017 Trip spans 32 days
$1623
Select
Icelandair
Icelandair
LHR
SEA
29h 05m
1 stop
SEA
LHR
11h 15m
1 stop
Depart: Sat Dec 16 2017 Return: Tue Jan 2 2018 Trip spans 18 days
Multiple Airlines
Multiple Airlines
LHR
SEA
31h 18m
2 stops
SEA
LHR
15h 52m
2 stops
Depart: Fri Aug 18 2017 Return: Sun Sep 3 2017 Trip spans 17 days
Multiple Airlines
Multiple Airlines
LHR
SEA
28h 10m
1 stop
SEA
LHR
25h 00m
1 stop
Depart: Fri Jun 30 2017 Return: Fri Jul 7 2017 Trip spans 8 days
$1594
Select
Multiple Airlines
Multiple Airlines
LHR
SEA
23h 50m
1 stop
SEA
LHR
18h 55m
2 stops
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
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.

If you have more questions or if you have a bad price to report to us,
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Airports
Origin

London
$507
Destination

Seattle
$507
Airlines Airline reviews

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

Overall
7.8
Boarding
7.7
Crew
8.3
Comfort
7.2
Food
7.5
Entertainment
7.6