Find Deals on 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
Students
under 26
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: Wed Mar 1 2017 Return: Thu Mar 9 2017 Trip spans 9 days
British Airways
British Airways
LGW
SEA
21h 41m
2 stops
SEA
LGW
19h 45m
2 stops
Depart: Thu Feb 23 2017 Return: Tue Feb 28 2017 Trip spans 6 days
Icelandair
Icelandair
LGW
SEA
12h 10m
1 stop
SEA
LGW
11h 45m
1 stop
Depart: Wed Dec 14 2016 Return: Tue Jan 3 2017 Trip spans 21 days
Lufthansa
Lufthansa
LHR
SEA
13h 20m
1 stop
SEA
LHR
18h 40m
1 stop
Depart: Mon Mar 6 2017 Return: Sun Mar 12 2017 Trip spans 7 days
KLM
KLM
LCY
SEA
20h 11m
2 stops
SEA
LCY
19h 45m
1 stop
Depart: Thu Jan 12 2017 Return: Mon Jan 16 2017 Trip spans 5 days
SWISS
SWISS
LCY
SEA
19h 29m
2 stops
SEA
LCY
27h 05m
2 stops
Depart: Sat Jun 10 2017 Return: Sat Jun 24 2017 Trip spans 15 days
Virgin Atlantic
Virgin Atlantic
LGW
SEA
15h 34m
1 stop
SEA
LGW
17h 05m
1 stop
Depart: Sat May 6 2017 Return: Sat May 20 2017 Trip spans 15 days
WestJet
WestJet
LGW
SEA
28h 04m
1 stop
SEA
LGW
29h 54m
1 stop
Depart: Fri Mar 31 2017 Return: Sun Apr 16 2017 Trip spans 17 days
British Airways
British Airways
LHR
SEA
9h 35m
nonstop
SEA
LHR
9h 20m
nonstop
Depart: Fri Jan 13 2017 Return: Mon Jan 16 2017 Trip spans 4 days
Icelandair
Icelandair
LHR
SEA
28h 05m
1 stop
SEA
LHR
11h 45m
1 stop
Depart: Tue Feb 7 2017 Return: Thu Feb 16 2017 Trip spans 10 days
British Airways
British Airways
LHR
SEA
9h 50m
nonstop
SEA
LHR
9h 20m
nonstop
Depart: Wed Jun 21 2017 Return: Tue Jun 27 2017 Trip spans 7 days
Lufthansa
Lufthansa
LCY
SEA
17h 25m
2 stops
SEA
LCY
18h 20m
1 stop
Depart: Sat Jan 14 2017 Return: Sun Jan 22 2017 Trip spans 9 days
Icelandair
Icelandair
LGW
SEA
12h 10m
1 stop
SEA
LGW
11h 45m
1 stop
Depart: Mon Apr 17 2017 Return: Mon Apr 24 2017 Trip spans 8 days
KLM
KLM
LCY
SEA
23h 12m
1 stop
SEA
LCY
13h 38m
1 stop
Depart: Wed Feb 1 2017 Return: Tue Feb 14 2017 Trip spans 14 days
British Airways
British Airways
LHR
SEA
9h 50m
nonstop
SEA
LHR
14h 45m
1 stop
Depart: Fri Jan 13 2017 Return: Mon Jan 16 2017 Trip spans 4 days
SWISS
SWISS
LCY
SEA
22h 03m
2 stops
SEA
LCY
27h 05m
2 stops
Depart: Fri Dec 9 2016 Return: Fri Dec 30 2016 Trip spans 22 days
Lufthansa
Lufthansa
LHR
SEA
16h 15m
2 stops
SEA
LHR
17h 40m
1 stop
Depart: Tue Feb 7 2017 Return: Wed Feb 22 2017 Trip spans 16 days
Icelandair
Icelandair
LGW
SEA
12h 10m
1 stop
SEA
LGW
11h 45m
1 stop
Depart: Wed Apr 5 2017 Return: Wed Apr 12 2017 Trip spans 8 days
British Airways
British Airways
LHR
SEA
17h 59m
1 stop
SEA
LHR
13h 44m
1 stop
Depart: Fri Apr 7 2017 Return: Sat Apr 22 2017 Trip spans 16 days
KLM
KLM
LCY
SEA
14h 07m
1 stop
SEA
LCY
19h 30m
1 stop
Depart: Tue May 9 2017 Return: Mon May 15 2017 Trip spans 7 days
SWISS
SWISS
LCY
SEA
21h 34m
2 stops
SEA
LCY
22h 15m
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.

We compile tonnes of data for you
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,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

London
only $601
only $716
only $592
Destination

Seattle
$592