Find Cheap 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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Book cheap flights from Seattle to London

(Round-trip)
Depart: Tue Oct 31 2017 Return: Thu Nov 9 2017 Trip spans 10 days
Major Airline
Major Airline
SEA
LHR
11h 45m
1 stop
LHR
SEA
12h 00m
1 stop
Depart: Wed Sep 27 2017 Return: Sun Oct 1 2017 Trip spans 5 days
Norwegian
Norwegian
SEA
LGW
9h 10m
nonstop
LGW
SEA
9h 55m
nonstop
Depart: Mon Sep 18 2017 Return: Tue Oct 10 2017 Trip spans 23 days
Icelandair
Icelandair
SEA
LHR
11h 45m
1 stop
LHR
SEA
12h 35m
1 stop
Depart: Fri Sep 22 2017 Return: Sun Oct 1 2017 Trip spans 10 days
United
United
SEA
LGW
15h 25m
1 stop
LGW
SEA
30h 13m
1 stop
Depart: Tue Oct 10 2017 Return: Tue Oct 31 2017 Trip spans 22 days
British Airways
British Airways
SEA
LCY
19h 00m
2 stops
LCY
SEA
37h 35m
2 stops
Depart: Sun Oct 29 2017 Return: Tue Nov 7 2017 Trip spans 10 days
SWISS
SWISS
SEA
LCY
26h 08m
2 stops
LCY
SEA
33h 58m
2 stops
Depart: Mon Sep 25 2017 Return: Wed Oct 11 2017 Trip spans 17 days
Lufthansa
Lufthansa
SEA
LCY
18h 20m
1 stop
LCY
SEA
17h 25m
2 stops
Depart: Tue Jun 13 2017 Return: Thu Jun 15 2017 Trip spans 3 days
WestJet
WestJet
SEA
LGW
12h 50m
1 stop
LGW
SEA
17h 28m
1 stop
Depart: Fri Aug 25 2017 Return: Sun Sep 24 2017 Trip spans 31 days
Virgin Atlantic
Virgin Atlantic
SEA
LHR
9h 00m
nonstop
LHR
SEA
9h 40m
nonstop
Depart: Mon Aug 21 2017 Return: Sat Sep 2 2017 Trip spans 13 days
Delta
Delta
SEA
LHR
15h 40m
1 stop
LHR
SEA
15h 20m
1 stop
Depart: Mon Oct 9 2017 Return: Wed Nov 1 2017 Trip spans 24 days
Major Airline
Major Airline
SEA
LGW
9h 20m
nonstop
LGW
SEA
9h 55m
nonstop
Depart: Thu Aug 3 2017 Return: Wed Aug 23 2017 Trip spans 21 days
$1125
Select
KLM
KLM
SEA
LCY
17h 17m
1 stop
LCY
SEA
12h 51m
1 stop
Depart: Mon Sep 25 2017 Return: Wed Oct 11 2017 Trip spans 17 days
Icelandair
Icelandair
SEA
LGW
11h 45m
1 stop
LGW
SEA
12h 50m
1 stop
Depart: Sun Sep 24 2017 Return: Sun Oct 8 2017 Trip spans 15 days
Norwegian
Norwegian
SEA
LGW
9h 10m
nonstop
LGW
SEA
9h 55m
nonstop
Depart: Wed Oct 11 2017 Return: Wed Nov 1 2017 Trip spans 22 days
Major Airline
Major Airline
SEA
LHR
9h 10m
nonstop
LHR
SEA
9h 50m
nonstop
Depart: Sat May 27 2017 Return: Wed Jun 28 2017 Trip spans 33 days
$1295
Select
Iberia
Iberia
SEA
LHR
9h 30m
nonstop
LHR
SEA
22h 17m
1 stop
Depart: Mon Sep 25 2017 Return: Wed Oct 18 2017 Trip spans 24 days
Icelandair
Icelandair
SEA
LHR
19h 40m
1 stop
LHR
SEA
12h 35m
1 stop
Depart: Mon Oct 9 2017 Return: Wed Nov 1 2017 Trip spans 24 days
Major Airline
Major Airline
SEA
LGW
9h 20m
nonstop
LGW
SEA
9h 55m
nonstop
Depart: Wed Oct 18 2017 Return: Wed Nov 1 2017 Trip spans 15 days
Major Airline
Major Airline
SEA
LHR
9h 10m
nonstop
LHR
SEA
9h 50m
nonstop
Depart: Mon Sep 25 2017 Return: Wed Oct 11 2017 Trip spans 17 days
Icelandair
Icelandair
SEA
LHR
11h 15m
1 stop
LHR
SEA
12h 35m
1 stop
* 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
$407
Destination

London
only $407
only $676
only $553
Airlines Airline reviews

5 travelers who booked a flight from Seattle to London rated their chosen airlines with an average of 8.4.

Overall
8.8
Boarding
8.8
Crew
8.8
Comfort
8.4
Food
8.0
Entertainment
7.6