£411 Cheap Flights from London (STN) to Seattle (SEA)

View £411 flight on Tue, 29 Sept 2026Opens in a new window

Popular airlines from Stansted Airport (STN) to Seattle-Tacoma International Airport (SEA)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 25% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from London (STN) to Seattle (SEA)

Prices were available within the past 7 days and start at £411 for one-way flights and £622 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Tue, 29 Sept - Tue, 6 Oct
STN
London
SEA
Seattle
£622 Return, found 1 day ago
£622
Return
found 1 day ago
Select Lufthansa flight, departing Tue, 29 Sept from London to Seattle, returning Tue, 6 Oct, priced at £622 found 1 day ago
Lufthansa
Tue, 29 Sept - Tue, 6 Oct
STN
London
SEA
Seattle
£629 Return, found 5 days ago
£629
Return
found 5 days ago
Select Lufthansa flight, departing Tue, 29 Sept from London to Seattle, returning Tue, 6 Oct, priced at £629 found 5 days ago
Lufthansa
Wed, 30 Sept - Mon, 5 Oct
STN
London
SEA
Seattle
£640 Return, found 6 hours ago
£640
Return
found 6 hours ago
Select Lufthansa flight, departing Wed, 30 Sept from London to Seattle, returning Mon, 5 Oct, priced at £640 found 6 hours ago
Lufthansa
Wed, 30 Sept - Mon, 5 Oct
STN
London
SEA
Seattle
£644 Return, found 6 hours ago
£644
Return
found 6 hours ago
Select Lufthansa flight, departing Wed, 30 Sept from London to Seattle, returning Mon, 5 Oct, priced at £644 found 6 hours ago
Lufthansa
Tue, 29 Sept - Tue, 6 Oct
STN
London
SEA
Seattle
£646 Return, found 5 days ago
£646
Return
found 5 days ago
Select Lufthansa flight, departing Tue, 29 Sept from London to Seattle, returning Tue, 6 Oct, priced at £646 found 5 days ago
Lufthansa
Tue, 22 Sept - Thu, 1 Oct
STN
London
SEA
Seattle
£654 Return, found 1 day ago
£654
Return
found 1 day ago
Select Lufthansa flight, departing Tue, 22 Sept from London to Seattle, returning Thu, 1 Oct, priced at £654 found 1 day ago
Lufthansa
Tue, 22 Sept - Wed, 30 Sept
STN
London
SEA
Seattle
£655 Return, found 22 hours ago
£655
Return
found 22 hours ago
Select Lufthansa flight, departing Tue, 22 Sept from London to Seattle, returning Wed, 30 Sept, priced at £655 found 22 hours ago
Lufthansa
Wed, 30 Sept - Mon, 5 Oct
STN
London
SEA
Seattle
£659 Return, found 6 hours ago
£659
Return
found 6 hours ago
Select Lufthansa flight, departing Wed, 30 Sept from London to Seattle, returning Mon, 5 Oct, priced at £659 found 6 hours ago
Lufthansa
Wed, 30 Sept - Mon, 5 Oct
STN
London
SEA
Seattle
£663 Return, found 6 hours ago
£663
Return
found 6 hours ago
Select Lufthansa flight, departing Wed, 30 Sept from London to Seattle, returning Mon, 5 Oct, priced at £663 found 6 hours ago
Turkish Airlines
Wed, 30 Sept - Wed, 7 Oct
STN
London
SEA
Seattle
£765 Return, found 1 day ago
£765
Return
found 1 day ago
Select Turkish Airlines flight, departing Wed, 30 Sept from London to Seattle, returning Wed, 7 Oct, priced at £765 found 1 day ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city centre is 20 minutes. Flights from £760
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city centre20 min
Flights from £760

Frequently asked questions

How do I find cheap flights from London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are approximately 2 connecting flights per day from London (STN-Stansted) (STN) to Seattle, WA (SEA-Seattle - Tacoma Intl.) (SEA). Some common connection points include Istanbul Airport (IST), Heathrow (LHR), and Dubai Intl. (DXB).
What is the earliest flight from London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from STN to SEA. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Flights from STN to SEA with one stop typically take around 18 hours 20 minutes, covering approximately 4,782 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Select the "Business class" and "First class" filters when looking for STN to SEA flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your London (STN-Stansted) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Stansted
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Lufthansa, Turkish Airlines
Return price
£621
Distance
7650 km

Book with confidence

Compare flights from London to Seattle easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to Seattle. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Stansted to Seattle - Tacoma Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Stansted (STN) to Seattle - Tacoma Intl. (SEA)

The easiest way to view the best deals on flights from London to Seattle today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Stansted to Seattle - Tacoma Intl. start at just £622 and range up to £777.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near London and Seattle
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your London to Seattle flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Stansted to Seattle - Tacoma Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from London to Seattle easily and book with confidence

Explore a world of travel with Expedia

*Available to Expedia members.