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
14 Jan
6:30 am
SEA
Seattle/Tacoma Intl airport
12h 20m
1 Stop
LGW
2:50 am
+1
London Gatwick airport
Icelandair
22 Jan
11:50 am
LGW
London Gatwick airport
13h 10m
1 Stop
SEA
5:00 pm
Seattle/Tacoma Intl airport
394 USD
Finnair
Finnair
03 Feb
10:25 am
SEA
Seattle/Tacoma Intl airport
9h 25m
LHR
3:50 am
+1
London Heathrow airport
Finnair
11 Feb
10:20 am
LHR
London Heathrow airport
20h 23m
2 Stops
SEA
10:43 pm
Seattle/Tacoma Intl airport
401 USD
Finnair
Finnair
13 Jan
10:25 am
SEA
Seattle/Tacoma Intl airport
9h 25m
LHR
3:50 am
+1
London Heathrow airport
Finnair
28 Jan
10:20 am
LHR
London Heathrow airport
20h 23m
2 Stops
SEA
10:43 pm
Seattle/Tacoma Intl airport
402 USD
Norwegian
Norwegian
15 Apr
6:45 am
SEA
Seattle/Tacoma Intl airport
9h 15m
LGW
12:00 am
+1
London Gatwick airport
Norwegian
22 Apr
10:50 am
LGW
London Gatwick airport
9h 55m
SEA
12:45 pm
Seattle/Tacoma Intl airport
426 USD
Norwegian Air UK
Norwegian Air UK
01 Apr
6:45 am
SEA
Seattle/Tacoma Intl airport
9h 15m
LGW
12:00 am
+1
London Gatwick airport
Norwegian Air UK
17 Apr
10:50 am
LGW
London Gatwick airport
9h 55m
SEA
12:45 pm
Seattle/Tacoma Intl airport
442 USD
Delta
Delta
13 Jan
9:50 am
SEA
Seattle/Tacoma Intl airport
9h 20m
LHR
3:10 am
+1
London Heathrow airport
Delta
24 Jan
6:30 am
LHR
London Heathrow airport
12h 54m
1 Stop
SEA
11:24 am
Seattle/Tacoma Intl airport
404 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 10% more expensive in the evening than in the morning
What is the cheapest airline that flies to London?
easyJet
easyJet, JetBlue, and SWISS are the most popular carriers operating from Seattle to London
What is the cheapest route?
Seattle/Tacoma Intl - London Gatwick
Fly from Seattle/Tacoma Intl to London Gatwick 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 20m The fastest flight from Seattle to London takes 9h 20m.
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
9h 54m
Cheapest price
475 USD
Seattle to Birmingham
Fastest flight time
12h 55m
Cheapest price
575 USD

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.