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
Students
under 26
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: Sat Jan 7 2017 Return: Sat Jan 14 2017 Trip spans 8 days
Virgin Atlantic
Virgin Atlantic
SEA
LGW
17h 15m
1 stop
LGW
SEA
15h 48m
1 stop
Depart: Mon Apr 17 2017 Return: Mon Jun 12 2017 Trip spans 57 days
British Airways
British Airways
SEA
LGW
18h 40m
2 stops
LGW
SEA
21h 34m
2 stops
Depart: Tue Feb 7 2017 Return: Tue Feb 14 2017 Trip spans 8 days
Finnair
Finnair
SEA
LHR
9h 30m
nonstop
LHR
SEA
9h 50m
nonstop
Depart: Fri Mar 31 2017 Return: Sun Apr 9 2017 Trip spans 10 days
Air Canada
Air Canada
SEA
LHR
15h 45m
1 stop
LHR
SEA
24h 35m
1 stop
Depart: Tue Mar 21 2017 Return: Wed Mar 29 2017 Trip spans 9 days
SWISS
SWISS
SEA
LCY
19h 35m
2 stops
LCY
SEA
22h 08m
2 stops
Depart: Sat Apr 1 2017 Return: Sat Apr 8 2017 Trip spans 8 days
Major Airline
Major Airline
SEA
LHR
14h 18m
1 stop
LHR
SEA
12h 42m
1 stop
Depart: Wed Feb 22 2017 Return: Mon Feb 27 2017 Trip spans 6 days
Icelandair
Icelandair
SEA
LGW
11h 45m
1 stop
LGW
SEA
12h 10m
1 stop
Depart: Thu Feb 16 2017 Return: Thu Feb 23 2017 Trip spans 8 days
Lufthansa
Lufthansa
SEA
LCY
19h 40m
1 stop
LCY
SEA
20h 24m
2 stops
Depart: Sat Apr 1 2017 Return: Sat Apr 8 2017 Trip spans 8 days
Delta
Delta
SEA
LCY
29h 33m
1 stop
LCY
SEA
33h 12m
1 stop
Depart: Sun Jan 8 2017 Return: Sat Jan 21 2017 Trip spans 14 days
$1003
Select
Alitalia
Alitalia
SEA
LCY
35h 32m
2 stops
LCY
SEA
16h 39m
2 stops
Depart: Sat Jun 17 2017 Return: Fri Jun 30 2017 Trip spans 14 days
$1027
Select
WestJet
WestJet
SEA
LGW
16h 54m
1 stop
LGW
SEA
13h 00m
1 stop
Depart: Sun Feb 26 2017 Return: Fri Mar 10 2017 Trip spans 13 days
Virgin Atlantic
Virgin Atlantic
SEA
LGW
18h 45m
1 stop
LGW
SEA
19h 15m
1 stop
Depart: Wed Mar 1 2017 Return: Wed Mar 8 2017 Trip spans 8 days
Virgin Atlantic
Virgin Atlantic
SEA
LGW
17h 40m
1 stop
LGW
SEA
19h 15m
1 stop
Depart: Thu Jan 26 2017 Return: Tue Feb 7 2017 Trip spans 13 days
Finnair
Finnair
SEA
LHR
9h 20m
nonstop
LHR
SEA
9h 50m
nonstop
Depart: Wed Mar 1 2017 Return: Wed Apr 26 2017 Trip spans 56 days
Virgin Atlantic
Virgin Atlantic
SEA
LGW
17h 40m
1 stop
LGW
SEA
15h 50m
1 stop
Depart: Wed Jan 11 2017 Return: Wed Jan 18 2017 Trip spans 8 days
SWISS
SWISS
SEA
LCY
18h 23m
2 stops
LCY
SEA
18h 47m
2 stops
Depart: Sat Jan 21 2017 Return: Sun Jan 29 2017 Trip spans 9 days
British Airways
British Airways
SEA
LGW
20h 00m
2 stops
LGW
SEA
35h 52m
1 stop
Depart: Sun Mar 5 2017 Return: Fri Mar 10 2017 Trip spans 6 days
Icelandair
Icelandair
SEA
LGW
11h 45m
1 stop
LGW
SEA
12h 10m
1 stop
Depart: Wed Apr 5 2017 Return: Sat Apr 15 2017 Trip spans 11 days
Major Airline
Major Airline
SEA
LCY
13h 20m
1 stop
LCY
SEA
14h 10m
1 stop
Depart: Thu Jan 5 2017 Return: Mon Jan 9 2017 Trip spans 5 days
Virgin Atlantic
Virgin Atlantic
SEA
LHR
9h 59m
nonstop
LHR
SEA
10h 25m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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
$551
Destination

London
only $557
only $668
only $551
Airlines Airline reviews

9 travelers who booked a flight from Seattle to London rated their chosen airlines with an average of 7.0.

Overall
7.1
Boarding
8.0
Crew
7.1
Comfort
6.2
Food
6.9
Entertainment
6.7