Cheap flights from Seattle to London

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Easily compare round-trip flights from Seattle to London

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 Seattle to London by changing tabs
Quickest
Cheapest
Icelandair
Icelandair
26 Jan
SEA
6:30 am
Seattle/Tacoma Intl airport
12h 20m
1 Stop
2:50 am
+1
LGW
London Gatwick airport
Icelandair
06 Feb
LGW
12:00 pm
London Gatwick airport
13h 00m
1 Stop
5:00 pm
SEA
Seattle/Tacoma Intl airport
428 USD
Icelandair
Icelandair
29 Jan
SEA
6:30 am
Seattle/Tacoma Intl airport
12h 25m
1 Stop
2:55 am
+1
LGW
London Gatwick airport
Icelandair
06 Feb
LGW
12:00 pm
London Gatwick airport
13h 00m
1 Stop
5:00 pm
SEA
Seattle/Tacoma Intl airport
428 USD
Iberia
Iberia
13 Apr
SEA
6:30 am
Seattle/Tacoma Intl airport
9h 40m
12:10 am
+1
LHR
London Heathrow airport
Iberia
03 Jun
LHR
10:40 am
London Heathrow airport
9h 55m
12:35 pm
SEA
Seattle/Tacoma Intl airport
445 USD
Virgin Atlantic
Virgin Atlantic
03 Apr
SEA
12:20 pm
Seattle/Tacoma Intl airport
9h 25m
5:45 am
+1
LHR
London Heathrow airport
Virgin Atlantic
15 Apr
LHR
12:30 pm
London Heathrow airport
9h 40m
2:10 pm
SEA
Seattle/Tacoma Intl airport
466 USD
Norwegian Air UK
Norwegian Air UK
03 Apr
SEA
6:45 am
Seattle/Tacoma Intl airport
9h 15m
12:00 am
+1
LGW
London Gatwick airport
Norwegian Air UK
19 Apr
LGW
10:50 am
London Gatwick airport
9h 55m
12:45 pm
SEA
Seattle/Tacoma Intl airport
474 USD
Norwegian
Norwegian
15 Apr
SEA
6:45 am
Seattle/Tacoma Intl airport
9h 15m
12:00 am
+1
LGW
London Gatwick airport
Norwegian
24 Apr
LGW
10:50 am
London Gatwick airport
9h 55m
12:45 pm
SEA
Seattle/Tacoma Intl airport
476 USD

How to get the cheapest flight ticket from Seattle to London

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 London?
October
The cheapest time of year to fly to London from Seattle is October. Most expensive is June
What is the cheapest day to fly to London?
Tuesday
The cheapest day of the week is typically Tuesday. The most expensive is typically Friday
When is the cheapest time to fly to London?
in the morning
Seattle to London flights are approximately 12% more expensive in the evening than in the morning
What is the cheapest airline that flies to London?
easyJet
easyJet, WOW air, and Singapore Airlines are the most popular carriers operating from Seattle to London
What is the cheapest route?
Seattle/Tacoma Intl - London Heathrow
Fly from Seattle/Tacoma Intl to London Heathrow for the best Seattle - London flight prices
When is the cheapest time to book a flight to London?
60 days before
The cheapest time to buy a flight from Seattle to London is approximately 60 days to departure
60
Days before departure
0

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

Find info about flight duration, direct flights, and airports for your flight from Seattle to London
Fastest flight time 9h 15m The fastest flight from Seattle to London takes 9h 15m.
Direct flights Every day Direct flights go from Seattle to London every day.
Airports in London 6 airports There are 6 airports near London: London City (LCY), London Heathrow (LHR), London Luton (LTN), London Stansted (STN), London Gatwick (LGW), London Southend (SEN)

Alternative routes for Seattle to London

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Portland to London
Fastest flight time
10h 03m
Cheapest price
207 USD
Seattle to Manchester
Fastest flight time
12h 10m
Cheapest price
494 USD
Seattle to Birmingham
Fastest flight time
12h 55m
Cheapest price
542 USD
Portland to Manchester
Fastest flight time
15h 45m
Cheapest price
671 USD
View more

Flights from Seattle to:

*Flight prices to London are based on prices for economy tickets found by momondo users during searches within the last 72 hours. These prices may no longer be available.