Cheap Flights from Seattle to London in 2019

Flight information Seattle to London

Cheapest roundtrip price last month


Non-stop airlines


Flights per week


Average flight time, total distance 4792 miles

9h 15min

Most popular airline last month

British Airways

London Heathrow, London Gatwick, London Stansted, London Luton and others

6 airports

Explore London

London Hotels

The Ritz London


The Soho Hotel


Charlotte Street Hotel


What Should I Expect On This Route?

The Seattle to London flight route is a long and expensive journey, but you’ll be able to pick from a wide variety of carriers and make any scheduling that you want for your flight. This route is served by dozens of different airlines, including Air Canada, American Airlines, Emirates, Delta, Finnair, Iberia, KLM, Icelandair, Brussels Airlines, and Avianca. Be sure to check out Skyscanner before you make your purchase so that you can get the best deals on your flight.

You’ll be in for a long flight on this route, clocking in at nearly 17 hours at its best. As an international flight, you’re also subject to additional delays than you’d face otherwise, so prepare accordingly.

Is There A Layover?

Unfortunately, almost all of the flights along this route require a layover, and some require multiple layovers. Layovers on this route can range anywhere from two hours to seven hours and are typically in international airports in the middle or the eastern seaboard of the United States.

On the bright side, the layovers on this flight route are well-trafficked destinations which should offer you with a bevy of amenities. You’ll be able to stretch your legs, go shopping, eat at a restaurant, and maybe even take a nap while waiting during your layover.

Leaving SeaTac

All of the flights along this route leave the Seattle-Tacoma International Airport, known as SeaTac. SeaTac is a pleasant and efficiently run airport, and you’ll find it easy to wait for your departure while there. You’ll be departing from SeaTac’s Central Terminal, which has free WiFi and device charging stations.

Arriving In London

You’ll be landing at London’s Heathrow Airport for the flights along this route. Depending on which carrier you’re flying with, you’ll be landing at either Terminal 2 or Terminal 3. Heathrow is an easy to navigate and well-run airport, so you’ll have no trouble at all finding your baggage and making your way to the transit hub.

When you arrive at the transit hub, you’ll be able to choose from an express train to downtown London, the Metro bus system, the London Underground subway, taxis, rental cars, and even rental bicycles. The London traffic can get quite thick, but the public transit options run extremely smoothly.

London is one of the world’s busiest tourist destinations. If you’re interested in history, art, culture, or sports, you’ll be able to find it in London. Be sure to bring an umbrella, as London has a reputation for being rainy most of the year.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.