Find Deals on Flights from Seattle to London

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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Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Seattle to London

(Round-trip)
Depart: Fri Mar 3 2017 Return: Wed Mar 8 2017 Trip spans 6 days
Virgin Atlantic
Virgin Atlantic
SEA
LGW
14h 20m
1 stop
LGW
SEA
15h 54m
1 stop
Depart: Tue Jun 6 2017 Return: Tue Jun 13 2017 Trip spans 8 days
Major Airline
Major Airline
SEA
LGW
11h 05m
1 stop
LGW
SEA
13h 05m
1 stop
Depart: Tue Jun 20 2017 Return: Mon Jun 26 2017 Trip spans 7 days
Icelandair
Icelandair
SEA
LGW
11h 35m
1 stop
LGW
SEA
13h 05m
1 stop
Depart: Tue Apr 25 2017 Return: Mon May 1 2017 Trip spans 7 days
Lufthansa
Lufthansa
SEA
STN
27h 30m
2 stops
STN
SEA
47h 16m
2 stops
Depart: Thu Jun 1 2017 Return: Tue Jun 13 2017 Trip spans 13 days
British Airways
British Airways
SEA
LHR
9h 10m
nonstop
LHR
SEA
9h 40m
nonstop
Depart: Mon Apr 10 2017 Return: Thu Apr 20 2017 Trip spans 11 days
SWISS
SWISS
SEA
LCY
18h 15m
2 stops
LCY
SEA
22h 47m
2 stops
Depart: Thu May 25 2017 Return: Sat Jun 10 2017 Trip spans 17 days
Air Canada
Air Canada
SEA
LHR
15h 50m
1 stop
LHR
SEA
18h 46m
1 stop
Depart: Thu Jun 1 2017 Return: Sat Jun 10 2017 Trip spans 10 days
United
United
SEA
LHR
15h 55m
1 stop
LHR
SEA
16h 26m
1 stop
Depart: Thu Aug 3 2017 Return: Mon Aug 21 2017 Trip spans 19 days
Thomas Cook Airlines
Thomas Cook Airlines
SEA
STN
15h 10m
1 stop
STN
SEA
18h 05m
1 stop
Depart: Wed May 10 2017 Return: Thu Jun 1 2017 Trip spans 23 days
WestJet
WestJet
SEA
LGW
12h 50m
1 stop
LGW
SEA
14h 50m
1 stop
Depart: Fri Mar 17 2017 Return: Fri Mar 24 2017 Trip spans 8 days
Virgin Atlantic
Virgin Atlantic
SEA
LGW
15h 20m
1 stop
LGW
SEA
18h 55m
1 stop
Depart: Thu Mar 23 2017 Return: Mon Mar 27 2017 Trip spans 5 days
Virgin Atlantic
Virgin Atlantic
SEA
LGW
14h 40m
1 stop
LGW
SEA
19h 35m
1 stop
Depart: Sat Apr 1 2017 Return: Sat Apr 8 2017 Trip spans 8 days
$1062
Select
Delta
Delta
SEA
LHR
17h 20m
2 stops
LHR
SEA
17h 19m
1 stop
Depart: Wed Aug 30 2017 Return: Tue Sep 12 2017 Trip spans 14 days
$1093
Select
KLM
KLM
SEA
LCY
16h 27m
1 stop
LCY
SEA
14h 01m
1 stop
Depart: Tue Apr 4 2017 Return: Mon Apr 10 2017 Trip spans 7 days
Virgin Atlantic
Virgin Atlantic
SEA
LGW
14h 05m
1 stop
LGW
SEA
18h 19m
1 stop
Depart: Mon Aug 21 2017 Return: Mon Aug 28 2017 Trip spans 8 days
$1175
Select
Alitalia
Alitalia
SEA
LCY
24h 14m
2 stops
LCY
SEA
32h 21m
2 stops
Depart: Sat Apr 1 2017 Return: Sat Apr 8 2017 Trip spans 8 days
$1251
Select
TAP Portugal
TAP Portugal
SEA
LGW
31h 57m
2 stops
LGW
SEA
38h 22m
2 stops
Depart: Thu Apr 6 2017 Return: Mon Apr 10 2017 Trip spans 5 days
Virgin Atlantic
Virgin Atlantic
SEA
LGW
14h 05m
1 stop
LGW
SEA
18h 19m
1 stop
Depart: Sat Apr 1 2017 Return: Sat Apr 8 2017 Trip spans 8 days
Major Airline
Major Airline
SEA
LHR
14h 10m
1 stop
LHR
SEA
14h 57m
1 stop
Depart: Tue Apr 11 2017 Return: Thu Apr 20 2017 Trip spans 10 days
SWISS
SWISS
SEA
LCY
20h 00m
2 stops
LCY
SEA
21h 32m
2 stops
* 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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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
$468
Destination

London
only $671
only $677
only $468
only $659
Airlines Airline reviews

47 travelers who booked a flight from Seattle to London rated their chosen airlines with an average of 7.9.

Overall
8.0
Boarding
8.3
Crew
8.6
Comfort
7.3
Food
7.4
Entertainment
8.0