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Flights from Seattle to London

Cheap flight deals from Seattle to London

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • Round-trip
  • One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

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

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights
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  • 6 13
  • 13 20
  • 20 27

  • May

    27 4
  • 4 11
  • 11 18
  • 18 25

  • Jun

    25 1
  • 1 8
  • 8 15
  • 15 22
  • 22 29
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from Seattle (SEA) to London (YXU) the cheapest?

    Airlines adjust prices for flights from Seattle to London based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Seattle (SEA) to London (YXU) cost?

    According to Trip.com's data, the lowest price is around AED 2,067.

  • What is the transportation method from the main airport to downtown in London?

    • The distance from London International Airport to downtown is about 8 km, by taxi about 20 minutes.

  • How many airports are there in London (YXU)?

    There are 1 airport(s) near London (YXU): London International Airport.

How to find a cheap flight from Seattle to London

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Seattle to London. Book your flights at the right time and save more.
1
Being flexible with your dates to get the cheapest Seattle to London ticket.
Tap "Date" on flight search bar to scan through the calender for Seattle to London airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Thu, May 1 at AED 444 for one-way flights.
2
Compare cheap Seattle to London flight deals from over hundreds of airlines.
Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from Seattle to London. The cheapest airline operating is WestJet.
3
Set up a Price Alert
By setting up a Price Alert for your Seattle to London route, you can easily track the price of your airline tickets from without manually checking every day.
4
Don't miss cheap Seattle to London flight deals and promo codes.
You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. If registering a free membership, you can receive more deals for your flights.
5
Book early or wait unitl the last minute.
It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.
6
Search for flights on the go.
To get the best flight booking experience on the go, download Trip.com and search for cheap flight tickets from Seattle to London to get exclusive deals for you.

Flight Info | Seattle to London

Cheapest one-way flight price AED 376
Off-season for travel April
Peak season for travel January
Flight distance 3,220.52 km
Popular airline WestJet

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