Cheap flights from Seattle to London from $276

Round-trip
1 adult
Economy
From?
To?
Tue 2/1
Tue 2/8

Travel Restriction Alert

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

Flight information for Seattle to London
(SEA to LON)

Find info about flight duration, direct flights, and airports for your flight from Seattle to London
Best Price Found$276The best one-way flight to London from Seattle in the past 72 hours is $276. The best round-trip flight deal from Seattle to London found on momondo in the last 72 hours is $588.
Fastest flight time9h 10mThe fastest flight from Seattle to London takes 9h 10m
Direct flightsNoneThere are no direct flights from Seattle to London. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - London Heathrow Airport, Seattle/Tacoma Intl Airport - London Gatwick Airport and Seattle/Tacoma Intl Airport - London City Airport.
Airports in London6 airportsThere 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 from Seattle to London?

October

The cheapest time of year to fly to London from Seattle is October. Most expensive is December

What is the cheapest day to depart Seattle for London?

Tuesday

The cheapest day of the week is typically Tuesday. The most expensive is typically Friday

When is the cheapest time to fly from Seattle to London?

in the evening

Seattle to London flights are approximately 6% more expensive in the morning than in the evening

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

Major Airline

Air Canada, Air France, and KLM are the most popular carriers operating from Seattle to London

What is the cheapest Seattle to London flight route?

Seattle/Tacoma Intl - London Heathrow

Fly from Seattle/Tacoma Intl to London Heathrow for the best Seattle - London flight prices

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

60 days before

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


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
Multiple Airlines
Feb 23
SEA2:24 amSeattle/Tacoma Intl
22h 16m
2 stops
STN12:40 amLondon Stansted
Mar 2
STN1:45 amLondon Stansted
22h 31m
2 stops
SEA12:16 amSeattle/Tacoma Intl
Icelandair
Feb 28
SEA9:50 amSeattle/Tacoma Intl
12h 00m
1 stop
LHR9:50 pmLondon Heathrow
Mar 30
LHR9:05 amLondon Heathrow
12h 50m
1 stop
SEA9:55 pmSeattle/Tacoma Intl
American Airlines
Mar 1
SEA7:29 pmSeattle/Tacoma Intl
23h 01m
2 stops
LGW6:30 pmLondon Gatwick
Mar 9
LGW6:15 amLondon Gatwick
19h 54m
2 stops
SEA2:09 amSeattle/Tacoma Intl
SWISS
Mar 2
SEA11:14 amSeattle/Tacoma Intl
17h 51m
2 stops
LCY5:05 amLondon City
Mar 16
LCY4:55 amLondon City
19h 26m
2 stops
SEA12:21 amSeattle/Tacoma Intl
Virgin Atlantic
Mar 14
SEA10:55 amSeattle/Tacoma Intl
18h 40m
1 stop
LCY5:35 amLondon City
Mar 21
LCY4:05 pmLondon City
24h 00m
1 stop
SEA4:05 pmSeattle/Tacoma Intl
KLM
Mar 21
SEA10:55 amSeattle/Tacoma Intl
11h 35m
1 stop
LCY10:30 pmLondon City
Mar 30
LCY5:25 amLondon City
14h 20m
1 stop
SEA7:45 pmSeattle/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 provided by Iberia and WestJet
Multiple Airlines
May 17
SEA3:13 pmSeattle/Tacoma Intl
31h 22m
3 stops
STN10:35 pmLondon Stansted
WestJet
Mar 29
SEA8:45 amSeattle/Tacoma Intl
15h 20m
1 stop
LHR12:05 amLondon Heathrow
Iberia
Apr 10
SEA3:15 pmSeattle/Tacoma Intl
9h 15m
LHR12:30 amLondon Heathrow

Search last-minute flights to London from Seattle

Find and compare round-trip flight prices for your last-minute flight from Seattle to London
Icelandair
Feb 6
SEA9:50 amSeattle/Tacoma Intl
12h 00m
1 stop
LHR9:50 pmLondon Heathrow
Feb 15
LHR7:15 amLondon Heathrow
12h 40m
1 stop
SEA7:55 pmSeattle/Tacoma Intl
Multiple Airlines
Feb 5
SEA9:50 amSeattle/Tacoma Intl
21h 10m
2 stops
STN7:00 amLondon Stansted
Feb 10
STN1:30 amLondon Stansted
18h 25m
2 stops
SEA7:55 pmSeattle/Tacoma Intl
Lufthansa
Feb 4
SEA9:10 amSeattle/Tacoma Intl
36h 15m
2 stops
LHR9:25 pmLondon Heathrow
Feb 6
LHR9:30 amLondon Heathrow
27h 53m
1 stop
SEA1:23 pmSeattle/Tacoma Intl
Turkish Airlines
Feb 3
SEA6:10 amSeattle/Tacoma Intl
38h 15m
2 stops
LGW8:25 pmLondon Gatwick
Feb 8
LGW12:15 pmLondon Gatwick
37h 48m
2 stops
SEA2:03 amSeattle/Tacoma Intl
WestJet
Feb 6
SEA7:45 amSeattle/Tacoma Intl
60h 25m
2 stops
LGW8:10 pmLondon Gatwick
Feb 23
LGW6:10 amLondon Gatwick
37h 04m
2 stops
SEA7:14 pmSeattle/Tacoma Intl
TAP AIR PORTUGAL
Feb 6
SEA5:25 pmSeattle/Tacoma Intl
33h 20m
2 stops
LGW2:45 amLondon Gatwick
Feb 15
LGW11:35 amLondon Gatwick
37h 06m
2 stops
SEA12:41 amSeattle/Tacoma Intl

Best airlines flying from Seattle to London

Compare and see reviews for airlines that fly from Seattle to London with momondo
AirlineRatingFree CancellationPrice
Finnair
PriceFrom $335
Free Cancellation
Rating
7.7
8.0

Boarding

7.7

Comfort

8.3

Crew

7.0

Entertainment

7.2

Food

Reviews

Good

1 / 10
Icelandair
PriceFrom $369
Free Cancellation
Rating
7.4
7.4

Boarding

7.0

Comfort

7.8

Crew

7.4

Entertainment

6.7

Food

Reviews

The trip was beautiful and the Icelander crew was very helpful with us

1 / 10
Air Canada
PriceFrom $373
Free Cancellation
Rating
7.7
8.0

Boarding

7.7

Comfort

8.3

Crew

7.3

Entertainment

6.6

Food

Reviews

We boarded 20 minutes before the actual boarding time. The plane left on time and arrived a little early. Air Canada's crew served 1 drink service during a 4.5 hour flight, with no snacks. It's a good thing that I have access to lounge service.

1 / 10
Norwegian Air UK
PriceFrom $377
Free Cancellation
Rating
2.0
Lufthansa
PriceFrom $378
Free Cancellation
Rating
7.4
7.6

Boarding

7.4

Comfort

7.9

Crew

7.0

Entertainment

7.1

Food

Reviews

My luggage got delayed, trying to reach out the airline and no updates for me where my luggage is and when it will be delivered to me.

1 / 10
Norwegian
PriceFrom $403
Free Cancellation
Rating
6.2
6.3

Boarding

6.1

Comfort

6.7

Crew

6.2

Entertainment

5.6

Food

Reviews

Pros: Crew was acceptable but sits terrible

Cons: Not a comfy flight

1 / 10
United Airlines
PriceFrom $407
Free Cancellation
Rating
7.3
7.5

Boarding

7.1

Comfort

7.8

Crew

7.0

Entertainment

6.7

Food

Reviews

I’m not a fan of the CRJ aircraft.

1 / 10
British Airways
PriceFrom $411
Free Cancellation
Rating
6.9
7.2

Boarding

7.0

Comfort

7.4

Crew

6.6

Entertainment

6.4

Food

Reviews

Considering I cancelled the flight 2 months ago -- I would have to say the communication was poor -- since I continue to received updates. I say poor since Kayak seems not to want to respond to me to reschedule a flight -- they hold my voucher -- so I can not do it on my own --

1 / 10
Air France
PriceFrom $414
Free Cancellation
Rating
7.9
7.8

Boarding

7.8

Comfort

8.3

Crew

7.2

Entertainment

7.5

Food

Reviews

Wrong advice was given by AF counter for the boarding by asking me to exit airport and then enter again , otherwise was ok .

1 / 10
American Airlines
PriceFrom $415
Free Cancellation
Rating
7.2
7.4

Boarding

7.1

Comfort

7.8

Crew

7.1

Entertainment

6.8

Food

Reviews

Flight attendant for first class is definitely not a morning person. Oh and the WiFi DID NOT WORK!

1 / 10

Icelandair flights from Seattle to London

Our best Icelandair deals on Seattle to London flight tickets
Icelandair
Feb 28
SEA9:50 amSeattle/Tacoma Intl
12h 00m
1 stop
LHR9:50 pmLondon Heathrow
Mar 30
LHR9:05 amLondon Heathrow
12h 50m
1 stop
SEA9:55 pmSeattle/Tacoma Intl
Icelandair
Mar 4
SEA9:50 amSeattle/Tacoma Intl
12h 00m
1 stop
LHR9:50 pmLondon Heathrow
Mar 19
LHR8:15 amLondon Heathrow
12h 40m
1 stop
SEA8:55 pmSeattle/Tacoma Intl
Icelandair
Feb 23
SEA9:50 amSeattle/Tacoma Intl
12h 00m
1 stop
LHR9:50 pmLondon Heathrow
Mar 2
LHR7:15 amLondon Heathrow
12h 40m
1 stop
SEA7:55 pmSeattle/Tacoma Intl

Turkish Airlines flights from Seattle to London

Our best Turkish Airlines deals on Seattle to London flight tickets
Turkish Airlines
Feb 3
SEA6:10 amSeattle/Tacoma Intl
38h 15m
2 stops
LGW8:25 pmLondon Gatwick
Feb 8
LGW12:15 pmLondon Gatwick
37h 48m
2 stops
SEA2:03 amSeattle/Tacoma Intl
Turkish Airlines
Feb 3
SEA6:10 amSeattle/Tacoma Intl
24h 35m
2 stops
LHR6:45 amLondon Heathrow
Feb 8
LHR4:10 pmLondon Heathrow
33h 53m
2 stops
SEA2:03 amSeattle/Tacoma Intl
Turkish Airlines
Feb 3
SEA6:10 amSeattle/Tacoma Intl
38h 15m
2 stops
LGW8:25 pmLondon Gatwick
Feb 5
LGW12:15 pmLondon Gatwick
36h 14m
2 stops
SEA12:29 amSeattle/Tacoma Intl

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

    Due to the global impact of COVID-19, some of our airline partners operating flights from Seattle/Tacoma Intl to London, such as Delta, Virgin Atlantic, and British Airways may have put in place flexible cancellation policies. Use our site to search for all of the airlines offering this flexibility to you.

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

    London is 4781.3 mi away from Seattle/Tacoma Intl. By plane, this route typically takes 11h 35m.


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

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

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

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 48 hours before departing to London.

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

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?

Returning to Seattle/Tacoma Intl from London

COVID-19 testing requirements
Visitors from London must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Seattle/Tacoma Intl.

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

If you are planning to travel to London 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

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Seattle to Manchester Flights
Fastest flight time17h 40m
Cheapest price$609
Seattle to Birmingham Flights
Fastest flight time20h 40m
Cheapest price$734
Spokane to London Flights
Fastest flight time12h 00m
Cheapest price$603

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