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 | $276 | The 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 time | 9h 10m | The fastest flight from Seattle to London takes 9h 10m |
| Direct flights | None | There 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 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 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
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
Search last-minute flights to London from Seattle
Find and compare round-trip flight prices for your last-minute flight from Seattle to London
Best airlines flying from Seattle to London
Compare and see reviews for airlines that fly from Seattle to London with momondo
Reviews
Good
Reviews
The trip was beautiful and the Icelander crew was very helpful with us
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.
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.
Reviews
Pros: Crew was acceptable but sits terrible
Cons: Not a comfy flight
Reviews
I’m not a fan of the CRJ aircraft.
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 --
Reviews
Wrong advice was given by AF counter for the boarding by asking me to exit airport and then enter again , otherwise was ok .
Reviews
Flight attendant for first class is definitely not a morning person. Oh and the WiFi DID NOT WORK!
Icelandair flights from Seattle to London
Our best Icelandair deals on Seattle to London flight tickets
Turkish Airlines flights from Seattle to London
Our best Turkish Airlines deals on Seattle to London flight tickets
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?
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?
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.