Cheap flights from Seattle to London Heathrow Airport

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1 adult
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Tue 26/10
Tue 2/11

Travel Restriction Alert

The COVID-19 (coronavirus) outbreak may impact travel from Seattle/Tacoma Intl to London Heathrow Airport.
View current United Kingdom travel restrictions

Flight information for Seattle to London Heathrow Airport
(SEA to LHR)

Find info about flight duration, direct flights, and airports for your flight from Seattle to London Heathrow Airport
Best price found£203The best flight deal from Seattle to London Heathrow Airport found on momondo in the last 72 hours is £203
Fastest flight time9h 05mThe fastest flight from Seattle to London Heathrow Airport takes 9h 05m
Direct flightsNoneThere are no direct flights from Seattle to London Heathrow Airport. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - London Heathrow Airport.

How to get the cheapest flight ticket from Seattle to London Heathrow Airport

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 from Seattle to London Heathrow Airport?

October

The cheapest time of year to fly to London Heathrow Airport from Seattle is October. The most expensive is December.

What is the cheapest airline that flies to London Heathrow Airport from Seattle?

Icelandair

American Airlines, Delta, and Iberia are the most popular carriers operating from Seattle to London Heathrow Airport

How far in advance should you book Seattle to London Heathrow Airport flights?

60 days before

The cheapest time to buy a flight from Seattle to London Heathrow Airport is approximately 60 days to departure


Easily compare return flights from Seattle to London Heathrow Airport

Below you can see the best fares for your return 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 Heathrow Airport by changing tabs
Virgin Atlantic
23 Dec
SEA08:30Seattle/Tacoma Intl
18h 35m
1 stop
LHR03:05London Heathrow
8 Jan
LHR07:35London Heathrow
17h 47m
1 stop
SEA01:22Seattle/Tacoma Intl
Multiple Airlines
1 Nov
SEA03:03Seattle/Tacoma Intl
27h 27m
2 stops
LHR06:30London Heathrow
10 Nov
LHR03:15London Heathrow
22h 33m
2 stops
SEA01:48Seattle/Tacoma Intl
Icelandair
16 Feb
SEA09:50Seattle/Tacoma Intl
12h 00m
1 stop
LHR21:50London Heathrow
23 Feb
LHR07:15London Heathrow
12h 40m
1 stop
SEA19:55Seattle/Tacoma Intl
Virgin Atlantic
26 Jan
SEA02:10Seattle/Tacoma Intl
18h 40m
1 stop
LHR20:50London Heathrow
3 Feb
LHR01:30London Heathrow
13h 30m
1 stop
SEA15:00Seattle/Tacoma Intl
Virgin Atlantic
16 Feb
SEA01:00Seattle/Tacoma Intl
17h 55m
2 stops
LHR18:55London Heathrow
23 Feb
LHR13:50London Heathrow
25h 10m
1 stop
SEA15:00Seattle/Tacoma Intl
Virgin Atlantic
26 Jan
SEA01:00Seattle/Tacoma Intl
16h 45m
2 stops
LHR17:45London Heathrow
3 Feb
LHR01:30London Heathrow
13h 30m
1 stop
SEA15:00Seattle/Tacoma Intl

Find the cheapest one-way flights from Seattle to London Heathrow Airport

If you're looking for one-way flights from Seattle to London Heathrow Airport, view some of our deals below provided by Iberia and Virgin Atlantic
Multiple Airlines
9 Nov
SEA05:00Seattle/Tacoma Intl
39h 00m
3 stops
LHR20:00London Heathrow
Virgin Atlantic
10 Nov
SEA01:00Seattle/Tacoma Intl
17h 55m
2 stops
LHR18:55London Heathrow
Iberia
15 Feb
SEA14:30Seattle/Tacoma Intl
9h 40m
LHR00:10London Heathrow

Search last-minute flights to London Heathrow Airport from Seattle

Find and compare flight prices for your last-minute flight from Seattle to London Heathrow Airport
Multiple Airlines
26 Oct
SEA03:03Seattle/Tacoma Intl
24h 22m
2 stops
LHR03:25London Heathrow
16 Nov
LHR03:15London Heathrow
22h 33m
2 stops
SEA01:48Seattle/Tacoma Intl
Icelandair
31 Oct
SEA11:50Seattle/Tacoma Intl
12h 00m
1 stop
LHR23:50London Heathrow
15 Nov
LHR15:40London Heathrow
28h 15m
1 stop
SEA19:55Seattle/Tacoma Intl
Multiple Airlines
27 Oct
SEA19:56Seattle/Tacoma Intl
22h 34m
2 stops
LHR18:30London Heathrow
10 Nov
LHR03:50London Heathrow
19h 53m
2 stops
SEA23:43Seattle/Tacoma Intl
Icelandair
31 Oct
SEA11:50Seattle/Tacoma Intl
12h 00m
1 stop
LHR23:50London Heathrow
25 Nov
LHR07:15London Heathrow
12h 40m
1 stop
SEA19:55Seattle/Tacoma Intl
Icelandair
30 Oct
SEA11:50Seattle/Tacoma Intl
12h 00m
1 stop
LHR23:50London Heathrow
15 Nov
LHR15:40London Heathrow
28h 15m
1 stop
SEA19:55Seattle/Tacoma Intl
Multiple Airlines
31 Oct
SEA17:50Seattle/Tacoma Intl
36h 40m
2 stops
LHR06:30London Heathrow
25 Nov
LHR01:00London Heathrow
23h 55m
2 stops
SEA00:55Seattle/Tacoma Intl

Best airlines flying from Seattle to London Heathrow Airport

Compare and see reviews for airlines that fly from Seattle to London Heathrow Airport with momondo
AirlineRatingFree cancellationPrice
Delta
PriceFrom £286
Free cancellation
Rating
8.2
Icelandair
PriceFrom £304
Free cancellation
Rating
7.4
Virgin Atlantic
PriceFrom £319
Free cancellation
Rating
9.3
American Airlines
PriceFrom £324
Free cancellation
Rating
7.2
Iberia
PriceFrom £326
Free cancellation
Rating
7.0
British Airways
PriceFrom £352
Free cancellation
Rating
7.0
KLM
PriceFrom £354
Free cancellation
Rating
7.9

  • Are airlines flying from Seattle/Tacoma Intl to London Heathrow offering flexible cancellation due to COVID-19?

    To ease the stress of booking flights, some of our airline partners flying from Seattle/Tacoma Intl to London Heathrow are responding to the global pandemic. The following airlines may have a flexible cancellation policy to help accommodate travellers: Virgin Atlantic, British Airways, and Delta.

  • How far is Seattle/Tacoma Intl to London Heathrow by plane?

    The distance between Seattle/Tacoma Intl and London Heathrow is about 4774.1 mi. By plane, this route typically takes 9h 25m.


Can I fly to London Heathrow from Seattle/Tacoma Intl right now?

Information is based on travel restrictions from Seattle/Tacoma Intl to London Heathrow

Most visitors from Seattle/Tacoma Intl need to provide a negative COVID-19 test result and/or quarantine to enter London Heathrow.

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to London Heathrow.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering London Heathrow.

Documents
Mandatory passenger locator form - Submit the form any time in the 48 hours before arriving in the UK. Show the form when checking in your plane, train or ferry to the UK.

Managed quarantine package for Scotland - All travelers arriving directly to Scotland are required to book their Managed Quarantine Package prior to travel.

COVID-19 testing package - All travelers must book and pay for a COVID-19 Testing Package prior to travel to England and Scotland.


Can I fly back to Seattle/Tacoma Intl from London Heathrow?

Returning to Seattle/Tacoma Intl from London Heathrow

COVID-19 testing requirements
Visitors from London Heathrow must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from London Heathrow are not required to quarantine after entering Seattle/Tacoma Intl.

If you are planning to travel to London Heathrow Airport at this time, it is recommended that you stay up to date on current restrictions and follow proper safety measures while in public.

Alternative routes for Seattle to London Heathrow Airport

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Seattle to London Stansted Airport Flights
Fastest flight time15h 10m
Cheapest price£406
Seattle to London Gatwick Airport Flights
Fastest flight time11h 55m
Cheapest price£406
Seattle to London Luton Airport Flights
Fastest flight time14h 25m
Cheapest price£411
Seattle to London City Airport Flights
Fastest flight time16h 00m
Cheapest price£544

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