Cheap Flights from Seattle to London (LON)

Expected price increase 20%
arrow_back
Where are you leaving from?
From Select Departure
To Select Destination
DD MMM - DD MMM ddd - ddd
When Select Date
1 Passenger
Economy
keyboard_arrow_down




Average price per month


  • Low Season: December
  • High Season: July
  • Prices for this route are volatile and fluctuate from month to month.
  • The cheapest flights are usually bought in December, March and January.
  • High season months are May, February and July. However, it's not the rule and you should always search current flight deals.
  • For example, the flight from Seattle to London is currently 46% cheaper than average.

Price increase as travel date approaches


  • Flight prices for this route increase by 39% if you book last minute. Hover on the graph above to see for yourself!.
  • To grab the lowest price possible, you should buy your flight around 53 days before departure!
  • Consider booking at least 16 days before departure to increase your chances of getting a low price.
  • Generally, it's safe to book between 90 and 60 days in advance.

Seattle to London Flight Information

Flights Depart FromSeattle (SEA)
Flights Arriving ToLondon (LHR)
Distance7704.86 km
Current Discount46 %
Average Price $1363.24
Good Deal $675.07
Cheapest AirlinesIcelandair, Air France, United Airlines
Popular AirlinesFinnair, Air France, British Airways, Icelandair, Brussels Airlines, American Airlines, United Airlines
Flight Duration09 hours 52 minutes
Flights Depart From
Seattle (SEA)
Flights Arrive In
London (LHR)
Distance
7704.86 km
Flight Duration
09 hours 52 minutes
Current Discount
46 %
Average Price
$1363.24
Good Deal
$675.07
Cheapest Airlines
Icelandair, Air France, United Airlines
Popular Airlines
Finnair, Air France, British Airways, Icelandair, Brussels Airlines, American Airlines, United Airlines

Most Reliable Airlines flying to London

Airline Overall Rating On time arrival Check-in & Boarding Cleanliness Customer Service Food & Beverage Entertainment Legroom Seat Comfort
Finnair Finnair 3.7 4.0 4.0 4.0 4.0 3.5 3.0 3.5 3.5
Air France Air France 3.6 4.0 3.5 4.0 3.5 3.5 3.5 3.5 3.5
British Airways British Airways 3.6 4.0 4.0 4.0 3.5 3.0 3.0 3.5 3.5
Icelandair Icelandair 3.6 3.5 3.5 4.0 4.0 3.0 3.5 3.5 3.5
Brussels Airlines Brussels Airlines 3.4 3.5 3.5 4.0 3.5 3.0 2.5 3.5 3.5
American Airlines American Airlines 3.3 4.0 3.5 3.5 3.5 3.0 3.0 3.5 3.0
United Airlines United Airlines 3.3 4.0 3.5 3.5 3.5 3.0 3.0 3.0 3.0
Overall Rating
3.5
On time arrival
4.0
Check-in & Boarding
4.0
Cleanliness
4.0
Customer Service
4.0
Food & Beverage
3.5
Entertainment
3.0
Legroom
3.5
Seat Comfort
3.5
Overall Rating
3.5
On time arrival
4.0
Check-in & Boarding
3.5
Cleanliness
4.0
Customer Service
3.5
Food & Beverage
3.5
Entertainment
3.5
Legroom
3.5
Seat Comfort
3.5
Overall Rating
3.5
On time arrival
4.0
Check-in & Boarding
4.0
Cleanliness
4.0
Customer Service
3.5
Food & Beverage
3.0
Entertainment
3.0
Legroom
3.5
Seat Comfort
3.5
Overall Rating
3.5
On time arrival
3.5
Check-in & Boarding
3.5
Cleanliness
4.0
Customer Service
4.0
Food & Beverage
3.0
Entertainment
3.5
Legroom
3.5
Seat Comfort
3.5
Overall Rating
3.5
On time arrival
3.5
Check-in & Boarding
3.5
Cleanliness
4.0
Customer Service
3.5
Food & Beverage
3.0
Entertainment
2.5
Legroom
3.5
Seat Comfort
3.5
Overall Rating
3.5
On time arrival
4.0
Check-in & Boarding
3.5
Cleanliness
3.5
Customer Service
3.5
Food & Beverage
3.0
Entertainment
3.0
Legroom
3.5
Seat Comfort
3.0
Overall Rating
3.5
On time arrival
4.0
Check-in & Boarding
3.5
Cleanliness
3.5
Customer Service
3.5
Food & Beverage
3.0
Entertainment
3.0
Legroom
3.0
Seat Comfort
3.0

Good to know:


  • London International is the major airport in London and surrounding area.

Enter your preferred departure airport and travel dates into the search form above to unlock the latest London flight deals.

Track the flight prices from Seattle to London by subscribing to Fare Alerts to never miss the best deals possible.

Did you know that you could find even better deals when you use our Mobile App?.

How to get the cheapest flight to London?

Currently there is a 46% discount on flights to London. This price won't stay too long and you should consider buying now.

Flight prices for this route are expected to go up by 20%.

Search and compare flight options now!.

Awesome Deals

notifications_active In the past few days the following airlines offered the lowest prices from Seattle to London: Icelandair, Air France and United Airlines..

Top Destination Hotels Of The Day ()

loading...

Inexpensive Cars in London

loading...

Frequently Asked Questions

  • How long is a direct flight from Seattle to London?A direct flight from Seattle to London takes roughly 09 hours 52 minutes.
  • How many direct flights are there between Seattle to London daily?On average, there are 16 direct flights from Seattle to London each day.
  • Which airlines offer cheap airfare from Seattle to London?That may change at any time. But in the past 14 days, the cheapest tickets we've found were with Icelandair, Air France and United Airlines.
  • Do I need my passport to fly from Seattle to London?Yes, you most certainly do.
  • Which airlines fly from Seattle to London most often?Finnair, Air France, British Airways, Icelandair, Brussels Airlines, American Airlines and United Airlines are the top.
  • What's the cheapest day to fly from Seattle to London?That depends. Recently, the cheapest day to fly from Seattle to London has been Wednesday. And the cheapest return flight from Wednesday has been. That said, the cheapest departure days are constantly changing.
  • Which airport will I be flying from in Seattle?When departing from Seattle you'll be flying out of Seattle-Tacoma International.
  • Which airport will I be flying from in London?When departing from London you'll be flying out of Heathrow.
  • How is Justfly.com so good at finding cheap flights?We've taken an oath of secrecy and vowed never to say. Just kidding. Our team and technology allows us to browse through hundreds of airlines and hundreds of thousands of flights to find the lowest prices. Then we pass the savings on to you.
  • Can Justfly.com help me save money in any other way?We're glad you asked. We help you save money with our Fare Alerts, Price Trend charts and multi-ticket bookings. We also help you save on hotels and car rentals.
  • How many airlines does Justfly.com search to find affordable flights?We typically search over 400 airlines.
  • Can Justfly.com's Price Trend tool really tell me the best time to buy tickets?Absolutely! That's why we've made it accessible to you.
  • Will the price of my flight change?Flight prices and availability change often. To counter this, we update the important data as often as possible every step of the way.
  • How will I receive my booking confirmation and travel information?We'll send you an email with the important details!
  • Can you cancel or change Justfly.com flights?You sure can. But give us a call first. We'll do our best to find a solution. However, in some cases, if we cancel your booking, we'll have to charge an administrative fee of $75 (domestic), $125 (trans-border between Canada and USA) and $200 (international).
  • Are Justfly.com's tickets refundable?All bookings are currently non-refundable.
  • How do I contact Justfly.com?To find answers to all of your questions, click here to visit our support page.