Find Deals on Flights from London Heathrow 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.
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 London Heathrow to Seattle

(Round-trip)
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: 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: Wed Dec 7 2016 Return: Wed Dec 14 2016 Trip spans 8 days
Virgin Atlantic
Virgin Atlantic
LHR
SEA
10h 44m
nonstop
SEA
LHR
13h 10m
1 stop
Depart: Mon Apr 17 2017 Return: Mon Apr 24 2017 Trip spans 8 days
British Airways
British Airways
LHR
SEA
9h 35m
nonstop
SEA
LHR
9h 15m
nonstop
Depart: Wed Feb 22 2017 Return: Sun Feb 26 2017 Trip spans 5 days
Icelandair
Icelandair
LHR
SEA
28h 05m
1 stop
SEA
LHR
11h 45m
1 stop
Depart: Mon Apr 3 2017 Return: Fri Apr 14 2017 Trip spans 12 days
British Airways
British Airways
LHR
SEA
35h 48m
1 stop
SEA
LHR
9h 15m
nonstop
Depart: Thu Jun 15 2017 Return: Mon Jul 3 2017 Trip spans 19 days
British Airways
British Airways
LHR
SEA
9h 35m
nonstop
SEA
LHR
9h 15m
nonstop
Depart: Fri Jun 2 2017 Return: Fri Jun 16 2017 Trip spans 15 days
British Airways
British Airways
LHR
SEA
9h 40m
nonstop
SEA
LHR
9h 15m
nonstop
Depart: Tue May 9 2017 Return: Mon May 15 2017 Trip spans 7 days
British Airways
British Airways
LHR
SEA
9h 35m
nonstop
SEA
LHR
16h 30m
1 stop
Depart: Fri May 26 2017 Return: Sat Jun 3 2017 Trip spans 9 days
British Airways
British Airways
LHR
SEA
9h 40m
nonstop
SEA
LHR
9h 15m
nonstop
Depart: Sun Apr 2 2017 Return: Tue Apr 11 2017 Trip spans 10 days
British Airways
British Airways
LHR
SEA
9h 35m
nonstop
SEA
LHR
13h 20m
1 stop
Depart: Wed Mar 15 2017 Return: Wed Mar 22 2017 Trip spans 8 days
British Airways
British Airways
LHR
SEA
9h 50m
nonstop
SEA
LHR
9h 30m
nonstop
Depart: Sun Jan 29 2017 Return: Sat Mar 11 2017 Trip spans 42 days
British Airways
British Airways
LHR
SEA
9h 50m
nonstop
SEA
LHR
9h 30m
nonstop
Depart: Thu Dec 22 2016 Return: Thu Dec 29 2016 Trip spans 8 days
$1000
Select
British Airways
British Airways
LHR
SEA
9h 50m
nonstop
SEA
LHR
9h 20m
nonstop
* 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
$601
Destination

Seattle
$601
Airlines Airline reviews

64 travelers who booked a flight from London to Seattle rated their chosen airlines with an average of 7.8.

Overall
7.9
Boarding
7.6
Crew
8.4
Comfort
7.1
Food
7.6
Entertainment
7.7