Best Price Found
Fastest flight time
If you are looking to fly from Seattle to London, you are most likely going to fly from Seattle/Tacoma Intl Airport to London Heathrow Airport, the most popular airports on that route. The least expensive flight option from Seattle to London will typically be SEA — LHR during the month of September with an average price of $493 RT.
|Lufthansa||PriceFrom $402||Free Cancellation||Rating|
|Icelandair||PriceFrom $493||Free Cancellation||Rating|
|Aer Lingus||PriceFrom $525||Free Cancellation||Rating|
|Finnair||PriceFrom $578||Free Cancellation||Rating|
|Iberia||PriceFrom $623||Free Cancellation||Rating|
|Delta||PriceFrom $624||Free Cancellation||Rating|
|American Airlines||PriceFrom $640||Free Cancellation||Rating|
|Virgin Atlantic||PriceFrom $647||Free Cancellation||Rating|
|British Airways||PriceFrom $654||Free Cancellation||Rating|
|Alaska Airlines||PriceFrom $656||Free Cancellation||Rating|
Alaska Airlines is one of the most popular airlines flying from Seattle to London Heathrow Airport, operating 7 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to London Heathrow Airport starts from $656 round-trip, up to an average price of $1,005. Our users have rated Alaska Airlines at 7.9/10.
Another popular option for Seattle to London Heathrow Airport flights is Delta (7.8/10, 1,565 ratings). Delta flies from Seattle to London Heathrow Airport around 14 times per week, with deals starting from $624 round-trip and rising to an average price of around $1,056.
The straight-line distance from Seattle/Tacoma Intl to London Heathrow is 4774.1 mi. 9h 15m is a normal flight duration for this route.
Prices for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport are refreshed on a daily basis.
The number of operators available for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport is 14 as of September 2023.
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to London Heathrow Airport.
The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
Finding the right flight to London from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.
Flights from Seattle to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
Once you have performed a search for Seattle to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
Price alerts on flights to London from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.