$221 Find Cheap Flights from Seattle to London

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Find cheap flights from Seattle to London starting at $221.

Book one-way or return flights from Seattle to London from as little as $221. Choose from the popular airlines below and book your flight today!

One way
Round-trip

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

Searching for the best last minute flight from Seattle to London? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from Seattle to London. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Find cheap airlines flights from Seattle to London

View airlines operating flights from Seattle to London. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

WestJet

From $221

Alaska Airlines

From $266

Delta Air Lines

From $373

Frontier Airlines

From $565

United Airlines

From $599

ANA airlines

Find more flights and airlines

Find cheap flights from Seattle to London by different airports

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Seattle to London.

Cheapest
SEA
07:00
19h 30m
1 transfer
YXU
05:30
Seattle-Tacoma International Airport - London International Airport
Sun, May 26WestJet
$221
SEA
07:00
19h 30m
1 transfer
YXU
05:30
Seattle-Tacoma International Airport - London International Airport
Sun, May 26WestJet
$221
Find More Flights

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 departure date and time of your selection. By analyzing data from all airlines, we've discovered that 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 $653.
What is the transportation method from the main airport to downtown in London?
- The distance from London International Airport to downtown is about 8km. It takes about 20 minutes by taxi.

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.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com