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 | £203 | The best flight deal from Seattle to London Heathrow Airport found on momondo in the last 72 hours is £203 |
| Fastest flight time | 9h 05m | The fastest flight from Seattle to London Heathrow Airport takes 9h 05m |
| Direct flights | None | There 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![Virgin Atlantic]()
23 Dec![Virgin Atlantic]()
8 Jan
SEA08:30Seattle/Tacoma Intl
18h 35m
1 stop
LHR03:05London Heathrow
LHR07:35London Heathrow
17h 47m
1 stop
SEA01:22Seattle/Tacoma Intl
Multiple Airlines![Multiple Airlines]()
1 Nov![Multiple Airlines]()
10 Nov
SEA03:03Seattle/Tacoma Intl
27h 27m
2 stops
LHR06:30London Heathrow
LHR03:15London Heathrow
22h 33m
2 stops
SEA01:48Seattle/Tacoma Intl
Icelandair![Icelandair]()
16 Feb![Icelandair]()
23 Feb
SEA09:50Seattle/Tacoma Intl
12h 00m
1 stop
LHR21:50London Heathrow
LHR07:15London Heathrow
12h 40m
1 stop
SEA19:55Seattle/Tacoma Intl
Virgin Atlantic![Virgin Atlantic]()
26 Jan![Virgin Atlantic]()
3 Feb
SEA02:10Seattle/Tacoma Intl
18h 40m
1 stop
LHR20:50London Heathrow
LHR01:30London Heathrow
13h 30m
1 stop
SEA15:00Seattle/Tacoma Intl
Virgin Atlantic![Virgin Atlantic]()
16 Feb![Virgin Atlantic]()
23 Feb
SEA01:00Seattle/Tacoma Intl
17h 55m
2 stops
LHR18:55London Heathrow
LHR13:50London Heathrow
25h 10m
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
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![Multiple Airlines]()
26 Oct![Multiple Airlines]()
16 Nov
SEA03:03Seattle/Tacoma Intl
24h 22m
2 stops
LHR03:25London Heathrow
LHR03:15London Heathrow
22h 33m
2 stops
SEA01:48Seattle/Tacoma Intl
Icelandair![Icelandair]()
31 Oct![Icelandair]()
15 Nov
SEA11:50Seattle/Tacoma Intl
12h 00m
1 stop
LHR23:50London Heathrow
LHR15:40London Heathrow
28h 15m
1 stop
SEA19:55Seattle/Tacoma Intl
Multiple Airlines![Multiple Airlines]()
27 Oct![Multiple Airlines]()
10 Nov
SEA19:56Seattle/Tacoma Intl
22h 34m
2 stops
LHR18:30London Heathrow
LHR03:50London Heathrow
19h 53m
2 stops
SEA23:43Seattle/Tacoma Intl
Icelandair![Icelandair]()
31 Oct![Icelandair]()
25 Nov
SEA11:50Seattle/Tacoma Intl
12h 00m
1 stop
LHR23:50London Heathrow
LHR07:15London Heathrow
12h 40m
1 stop
SEA19:55Seattle/Tacoma Intl
Icelandair![Icelandair]()
30 Oct![Icelandair]()
15 Nov
SEA11:50Seattle/Tacoma Intl
12h 00m
1 stop
LHR23:50London Heathrow
LHR15:40London Heathrow
28h 15m
1 stop
SEA19:55Seattle/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
AirlineFree cancellationPrice
PriceFrom £286
Free cancellation
PriceFrom £304
Free cancellation
PriceFrom £319
Free cancellation
PriceFrom £324
Free cancellation
PriceFrom £326
Free cancellation
PriceFrom £352
Free cancellation
PriceFrom £354
Free cancellation
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.
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.
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.