Cheap flights from London to Seattle

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Easily compare round-trip flights from London to Seattle

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from London to Seattle by changing tabs
Quickest
Cheapest
Delta
Delta
07 Jan
LHR
9:25 am
London Heathrow airport
16h 42m
1 Stop
6:07 pm
SEA
Seattle/Tacoma Intl airport
Delta
14 Jan
SEA
5:25 am
Seattle/Tacoma Intl airport
13h 30m
1 Stop
2:55 am
+1
LHR
London Heathrow airport
332 USD
Delta
Delta
07 Jan
LHR
9:25 am
London Heathrow airport
16h 42m
1 Stop
6:07 pm
SEA
Seattle/Tacoma Intl airport
Delta
14 Jan
SEA
5:25 am
Seattle/Tacoma Intl airport
13h 30m
1 Stop
2:55 am
+1
LHR
London Heathrow airport
332 USD
Delta
Delta
15 Jan
LHR
9:25 am
London Heathrow airport
16h 42m
1 Stop
6:07 pm
SEA
Seattle/Tacoma Intl airport
Delta
23 Jan
SEA
3:40 am
Seattle/Tacoma Intl airport
15h 20m
1 Stop
3:00 am
+1
LHR
London Heathrow airport
332 USD
Virgin Atlantic
Virgin Atlantic
09 Jan
LHR
12:25 pm
London Heathrow airport
9h 50m
2:15 pm
SEA
Seattle/Tacoma Intl airport
Virgin Atlantic
16 Jan
SEA
9:50 am
Seattle/Tacoma Intl airport
9h 20m
3:10 am
+1
LHR
London Heathrow airport
403 USD
Norwegian Air UK
Norwegian Air UK
11 Oct
LGW
10:50 am
London Gatwick airport
9h 55m
12:45 pm
SEA
Seattle/Tacoma Intl airport
Norwegian Air UK
18 Oct
SEA
6:45 am
Seattle/Tacoma Intl airport
9h 15m
12:00 am
+1
LGW
London Gatwick airport
415 USD
Norwegian
Norwegian
28 Aug
LGW
10:50 am
London Gatwick airport
9h 55m
12:45 pm
SEA
Seattle/Tacoma Intl airport
Norwegian
09 Sep
SEA
6:45 am
Seattle/Tacoma Intl airport
9h 15m
12:00 am
+1
LGW
London Gatwick airport
684 USD

How to get the cheapest flight ticket from London to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Seattle?
October
The cheapest time of year to fly to Seattle from London is October. Most expensive is July
What is the cheapest day to fly to Seattle?
Tuesday
The cheapest day of the week is typically Tuesday. The most expensive is typically Monday
When is the cheapest time to fly to Seattle?
in the afternoon
London to Seattle flights are approximately 9% more expensive in the evening than in the afternoon
What is the cheapest airline that flies to Seattle?
United Airlines
United Airlines, Lufthansa, and Air Canada are the most popular carriers operating from London to Seattle
What is the cheapest route?
London Heathrow - Seattle/Tacoma Intl
Fly from London Heathrow to Seattle/Tacoma Intl for the best London - Seattle flight prices
When is the cheapest time to book a flight to Seattle?
45 days before
The cheapest time to buy a flight from London to Seattle is approximately 45 days to departure
60
Days before departure
0

Flight information for London to Seattle (03A - LON)

Find info about flight duration, direct flights, and airports for your flight from London to Seattle
Fastest flight time 9h 40m The fastest flight from London to Seattle takes 9h 40m.
Direct flights Every day Direct flights go from London to Seattle every day.
Airports in Seattle 3 airports There are 3 airports near Seattle: Seattle King County/Boeing (BFI), Seattle Lake Union Spb (LKE), Seattle/Tacoma Intl (SEA)

Alternative routes for London to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Birmingham to Seattle
Fastest flight time
13h 01m
Cheapest price
455 USD
Manchester to Seattle
Fastest flight time
9h 35m
Cheapest price
521 USD
London to Portland
Fastest flight time
10h 43m
Cheapest price
543 USD
Birmingham to Portland
Fastest flight time
20h 28m
Cheapest price
667 USD
View more

Flights from London to:

Flights to Seattle from:

  • London
  • England
  • United Kingdom
  • Europe