Find Cheap Flights from United Kingdom 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.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

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

Book cheap flights from United Kingdom to Seattle

(Round-trip)
Depart: Wed Nov 22 2017 Return: Sat Dec 2 2017 Trip spans 11 days
Icelandair
Icelandair
LHR
SEA
12h 35m
1 stop
SEA
LHR
20h 20m
1 stop
Depart: Wed Sep 27 2017 Return: Sun Nov 5 2017 Trip spans 40 days
Norwegian
Norwegian
LGW
SEA
9h 55m
nonstop
SEA
LGW
9h 30m
nonstop
Depart: Wed Jan 10 2018 Return: Wed Jan 24 2018 Trip spans 15 days
SWISS
SWISS
LCY
SEA
19h 29m
2 stops
SEA
LCY
20h 30m
2 stops
Depart: Wed Jan 10 2018 Return: Wed Jan 24 2018 Trip spans 15 days
Air France
Air France
SOU
SEA
13h 10m
1 stop
SEA
SOU
18h 15m
2 stops
Depart: Tue Dec 12 2017 Return: Wed Jan 10 2018 Trip spans 30 days
Multiple Airlines
Multiple Airlines
GLA
SEA
19h 34m
2 stops
SEA
GLA
21h 10m
2 stops
Depart: Wed Feb 14 2018 Return: Wed Feb 28 2018 Trip spans 15 days
Lufthansa
Lufthansa
LCY
SEA
20h 10m
2 stops
SEA
LCY
18h 35m
1 stop
Depart: Mon Dec 25 2017 Return: Tue Jan 9 2018 Trip spans 16 days
Virgin Atlantic
Virgin Atlantic
LHR
SEA
37h 35m
1 stop
SEA
LHR
28h 30m
1 stop
Depart: Thu Sep 28 2017 Return: Wed Oct 4 2017 Trip spans 7 days
Air Canada
Air Canada
LHR
SEA
40h 18m
2 stops
SEA
LHR
17h 30m
2 stops
Depart: Mon Sep 18 2017 Return: Thu Oct 26 2017 Trip spans 39 days
WestJet
WestJet
LGW
SEA
26h 20m
1 stop
SEA
LGW
16h 18m
1 stop
Depart: Wed Nov 22 2017 Return: Tue Nov 28 2017 Trip spans 7 days
Icelandair
Icelandair
LHR
SEA
12h 35m
1 stop
SEA
LHR
20h 20m
1 stop
Depart: Wed Nov 29 2017 Return: Wed Dec 13 2017 Trip spans 15 days
Norwegian
Norwegian
LGW
SEA
9h 55m
nonstop
SEA
LGW
9h 30m
nonstop
Depart: Fri Jan 19 2018 Return: Mon Jan 29 2018 Trip spans 11 days
SWISS
SWISS
LCY
SEA
22h 03m
2 stops
SEA
LCY
36h 58m
2 stops
Depart: Wed Nov 22 2017 Return: Tue Nov 28 2017 Trip spans 7 days
Multiple Airlines
Multiple Airlines
LCY
SEA
21h 08m
2 stops
SEA
LCY
41h 50m
2 stops
Depart: Fri Dec 1 2017 Return: Sat Dec 9 2017 Trip spans 9 days
Icelandair
Icelandair
LGW
SEA
12h 50m
1 stop
SEA
LGW
11h 35m
1 stop
Depart: Fri Dec 1 2017 Return: Wed Dec 13 2017 Trip spans 13 days
Norwegian
Norwegian
LGW
SEA
9h 55m
nonstop
SEA
LGW
9h 30m
nonstop
Depart: Tue Dec 26 2017 Return: Tue Jan 2 2018 Trip spans 8 days
Multiple Airlines
Multiple Airlines
BHX
SEA
30h 25m
1 stop
SEA
BHX
17h 40m
2 stops
Depart: Wed Oct 18 2017 Return: Wed Nov 1 2017 Trip spans 15 days
SWISS
SWISS
LCY
SEA
20h 14m
2 stops
SEA
LCY
17h 36m
2 stops
Depart: Fri Dec 1 2017 Return: Sat Dec 9 2017 Trip spans 9 days
Icelandair
Icelandair
LHR
SEA
12h 35m
1 stop
SEA
LHR
20h 20m
1 stop
Depart: Mon Sep 18 2017 Return: Mon Sep 25 2017 Trip spans 8 days
Virgin Atlantic
Virgin Atlantic
LHR
SEA
16h 38m
1 stop
SEA
LHR
9h 10m
nonstop
Depart: Fri Dec 8 2017 Return: Fri Dec 29 2017 Trip spans 22 days
Air France
Air France
LHR
SEA
13h 15m
1 stop
SEA
LHR
14h 29m
1 stop
* 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

Southampton
$522
London
only $452
only $501
only $474
Glasgow
$530
Birmingham
$534
Destination

Seattle
$452
Airlines Airline reviews

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

Overall
8.2
Boarding
8.2
Crew
8.2
Comfort
7.1
Food
8.2
Entertainment
8.0