Cheap Flight Deals From Seattle (SEA) to London (LON) Starting at $321

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This Weekend's Flight Deals from Seattle to London

This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Airfares from $321 One Way, $501 Round Trip from Seattle to London

Prices starting at $501 for return flights and $321 for one-way flights to London were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

More About Flying To London from Seattle

Route Information for Flights from Seattle to London

Origin Airport IATA Code
Destination Airport IATA Code
4786 mi
Direct Flight Airlines
American Airlines, KLM, Alaska Airlines, Aer Lingus, Air France, Finnair, Delta Air Lines, Iberia, Aeromexico, Virgin Atlantic, Singapore Airlines, British Airways
Earliest Flight Arrival
1:50PM UTC
Latest Flight Arrival
11:05PM UTC

Travel from Seattle to London

International flights from Seattle to London are popular with business and vacation travelers alike. As the capital of England and the United Kingdom, London is a leading international power in cultural, financial, and tourist affairs. Look for great deals on flights to London on

Seattle, Washington

Seattle is the largest seaport in the Pacific Northwest, with over 3.4 million people calling it home. Seattle is known for its thriving music scene, wet winters, and unique skyline due largely to the Space Needle. Seattle is served by Sea-Tac Airport.

Sea-Tac Airport is located about 14 miles south of downtown Seattle off Interstate 5. Travelers can easily reach the airport from downtown Seattle by taxi or the Central Link light rail. Rail service runs from 5 a.m. to 1 a.m. Mondays through Saturdays and 6 a.m. through midnight on Sundays. Parking is available at the airport for travelers who choose to drive their own vehicles. General parking rates are $3 per hour or $28 per day, and it takes approximately 20 minutes to drive from downtown to the airport.

More than 20 airlines serve Sea-Tac with regularly scheduled domestic and international flights, including nonstop flights to London aboard American Airlines, British Airways, and Iberia Airlines. Sea-Tac Airport has more than 35 dining locations for passengers who want to relax with a drink or a meal before departing. Some options include Tully's Coffee, Wolfgang Puck Express, and The Great American Bagel Bakery.


Located in southern England, London is one of the busiest cities in the world, with enough rich history to amaze anyone. With royal palaces, famous towers, and modern architecture, the buildings of London are a diverse assortment; with over 26 million visitors each year, the people walking its streets are just as varied.

Experience London

Five major airports offer London visitors a variety of arrival destinations. London City Airport, Stansted Airport, London Luton Airport, Gatwick Airport, and Heathrow Airport all serve the London area with passenger flights. Train service is available from each airport into the downtown area, although travelers arriving at Luton Airport will need to take an 8-minute shuttle ride to the station. Queued taxis and rental vehicles are available at all five airports to take you to your final destination.

Visitors to London can expect rain and humidity during much of the year; the average humidity is over 90 percent. Summers in London are warm, with average high temperatures in the 70s during June, July, and August, making summer a pleasant time to visit. Winters are long, and average lows stay in the 30s from December through March.

Historical and awe-inspiring churches in London include St. Paul's Cathedral and Westminster Abbey, where many of England's kings are laid to rest. The National Gallery houses famous paintings including works by Van Gogh and Botticelli. Other famous attractions include Buckingham Palace, the Tower of London, and Big Ben.

Give Yourself the Royal Treatment

With many flights traveling from Seattle to London each day, it is easy to plan a vacation in England's royal city. Start preparing for your vacation when you make your travel arrangements on, where you can reserve flights, hotel accommodations, and rental cars all in one place.

Frequently asked questions

Am I able to catch a flight from Seattle to London now?
Our Covid-19 Travel Advisor can answer all your queries about current travel restrictions and quarantine requirements when taking a flight from Seattle to London.
Are there non-stop flights from Seattle to London?
There are as many as 4 airlines that offer nonstop services from Seattle - Tacoma Intl. Airport (SEA) to Heathrow Airport (LHR). You won’t have to worry about running to catch a connecting flight on this route! Here are some of the carriers you can book with:

  • Virgin Atlantic
  • American Airlines
  • British Airways
  • Delta

What is the shortest flight from Seattle to London?
With the quickest possible flight time from SEA to London (LHR-Heathrow) being 9 hours and 20 minutes, we recommend you have some in-flight survival tricks in your repertoire. Earplugs, a neck pillow and an eye-mask should be among the essentials packed into your carry-on.
What airlines fly from Seattle to London most frequently?
Here are the carriers that fly the most frequently between Seattle and London. Find out which one fits your travel plans: Virgin Atlantic - (VS) with 30 flights every month American Airlines - (AA) with 30 flights every month British Airways - (BA) with 30 flights every month Delta - (DL) with 4 flights every month
If I am not able to travel due to COVID-19, can I cancel my flight to London?
We get that traveling right now has its challenges, so it’s good to know that many reservations booked through us are able to be cancelled or changed. If your travel plans to London have been affected by COVID-19, a lot of airlines are making things easier by offering credits to use at a later date. Just sign in to your account and you’ll quickly see what options are available. Our Customer Service Portal is the place to go for more information.
Are there flights to London with flexible change policies?
In most cases you’ll have the option to reschedule your flight to London without a change fee. All you have to do then is pay the difference between the old flight and the new one. Look for the “no change fees” filter and book with confidence.
What is the cheapest day of the week to fly?
Consider flying out early in the week to save on your airfare. Orbitz data from 2021 shows that Monday is the cheapest day to depart, followed by Tuesday. Saturday showed the highest average ticket prices likely because many travelers prefer to start their vacation on a weekend.
What is the cheapest month to fly?
We won’t keep you guessing, according to Orbitz data from 2021, the cheapest month to fly is February. Perfect for those who need a weekend getaway, or just a break from it all in the shortest month of the year. Be aware that the most expensive time to fly is during the height of summer in July, and in the holiday month of December.*According to flight demand on from January to December 2021. Savings are subject to change based on departure location, date and destination.

Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.