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
KLM
KLM
13 Oct
SEA
8:20 am
Seattle/Tacoma Intl airport
9h 25m
1:45 am
+1
LHR
London Heathrow airport
KLM
22 Oct
LHR
7:30 am
London Heathrow airport
13h 10m
1 Stop
12:40 pm
SEA
Seattle/Tacoma Intl airport
405 USD
Delta
Delta
14 Oct
SEA
8:20 am
Seattle/Tacoma Intl airport
9h 25m
1:45 am
+1
LHR
London Heathrow airport
Delta
22 Oct
LHR
7:30 am
London Heathrow airport
13h 10m
1 Stop
12:40 pm
SEA
Seattle/Tacoma Intl airport
405 USD
Delta
Delta
15 Oct
SEA
8:20 am
Seattle/Tacoma Intl airport
9h 25m
1:45 am
+1
LHR
London Heathrow airport
Delta
22 Oct
LHR
7:30 am
London Heathrow airport
13h 10m
1 Stop
12:40 pm
SEA
Seattle/Tacoma Intl airport
405 USD
Norwegian
Norwegian
11 Oct
SEA
6:45 am
Seattle/Tacoma Intl airport
9h 15m
12:00 am
+1
LGW
London Gatwick airport
Norwegian
14 Oct
LGW
10:50 am
London Gatwick airport
9h 55m
12:45 pm
SEA
Seattle/Tacoma Intl airport
489 USD
Norwegian Air UK
Norwegian Air UK
11 Oct
SEA
6:45 am
Seattle/Tacoma Intl airport
9h 15m
12:00 am
+1
LGW
London Gatwick airport
Norwegian Air UK
13 Oct
LGW
11:00 am
London Gatwick airport
9h 55m
12:55 pm
SEA
Seattle/Tacoma Intl airport
542 USD
Air France
Air France
21 Oct
SEA
8:20 am
Seattle/Tacoma Intl airport
9h 25m
1:45 am
+1
LHR
London Heathrow airport
Air France
30 Oct
LHR
12:25 pm
London Heathrow airport
9h 50m
3:15 pm
SEA
Seattle/Tacoma Intl airport
416 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?
April
The cheapest time of year to fly to London from Seattle is April. Most expensive is June
What is the cheapest day to fly to London?
Monday
The cheapest day of the week is typically Monday. The most expensive is typically Friday
When is the cheapest time to fly to London?
in the afternoon
Seattle to London flights are approximately 13% more expensive in the evening than in the afternoon
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
9h 58m
Cheapest price
481 USD
Seattle to Manchester
Fastest flight time
9h 05m
Cheapest price
498 USD
Seattle to Birmingham
Fastest flight time
12h 50m
Cheapest price
527 USD
Portland to Manchester
Fastest flight time
12h 37m
Cheapest price
560 USD
View more

Flights from Seattle to:

  • London
  • England
  • United Kingdom
  • Europe

Flights to London from:

  • Seattle
  • Washington
  • United States
  • North America
*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.