Cheap flights from Seattle to London

Round-trip
Economy
Seattle (SEA)
London (LON)
Fri 5/8
Fri 5/15
Any month
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Flight information for Seattle to London
(03A to LON)

Find info about flight duration, direct flights, and airports for your flight from Seattle to London
Best Price Found $373 The best flight deal from Seattle to London found on momondo in the last 72 hours is $373
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)

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 Saturday
When is the cheapest time to fly to London?
in the morning
Seattle to London flights are approximately 6% more expensive in the evening than in the morning
What is the cheapest airline that flies to London?
Alaska Airlines
Alaska Airlines, easyJet, and JetBlue 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

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
Finnair
May 15
SEA
Seattle/Tacoma Intl
9h 20m
LHR
London Heathrow
May 24
LHR
London Heathrow
9h 45m
SEA
Seattle/Tacoma Intl
Aer Lingus
May 4
SEA
Seattle/Tacoma Intl
9h 20m
LHR
London Heathrow
May 15
LHR
London Heathrow
9h 45m
SEA
Seattle/Tacoma Intl
British Airways
May 5
SEA
Seattle/Tacoma Intl
33h 08m
1 stop
LHR
London Heathrow
May 12
LHR
London Heathrow
9h 45m
SEA
Seattle/Tacoma Intl

Find the cheapest one-way flights from Seattle to London

If you're looking for one-way flights from Seattle to London, view some of our deals below.
Quickest
Cheapest
Multiple Airlines
Jun 13
SEA
Seattle/Tacoma Intl
36h 50m
3 stops
LGW
London Gatwick
Multiple Airlines
Jun 23
SEA
Seattle/Tacoma Intl
34h 30m
3 stops
LHR
London Heathrow
Multiple Airlines
Jun 22
SEA
Seattle/Tacoma Intl
26h 30m
3 stops
LGW
London Gatwick

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 Flights
Fastest flight time
11h 55m
Cheapest price
$513
Portland to Manchester Flights
Fastest flight time
16h 04m
Cheapest price
$672

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