Cheap flights from Seattle to London from $260
This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to London departing on 6/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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WestJet flights from Seattle to London, Ontario
Our best WestJet deals on Seattle to London, Ontario flight tickets
Air Canada flights from Seattle to London, Ontario
Our best Air Canada deals on Seattle to London, Ontario flight tickets
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How to get the cheapest flight ticket from Seattle to London, Ontario
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest day to depart on your flight to London, Ontario?
According to our data, Thursday is the cheapest day to fly to London, Ontario from Seattle. The lowest ticket price found for a Thursday departure recently was $244. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to London, Ontario on Tuesday is $680.
What is the cheapest time of day to depart on your flight to London, Ontario?
In the evening is the cheapest time of day to fly from Seattle to London, Ontario when you can find flight prices for as low as $385. Flying to London, Ontario in the evening is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to London, Ontario, so prices are often more expensive at around $495 per ticket.
What is the cheapest airline that flies from Seattle/Tacoma Intl to London?
WestJet and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to London
What airlines fly to London, Ontario?
Alaska Airlines, Air Canada and WestJet are the top three most popular airlines that fly to London, Ontario from Seattle according to our data. Alaska Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to London, Ontario. Keep in mind that there are 5 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.
When to book flights from Seattle to London, Ontario
Cheap Seattle to London, Ontario (SEA to YXU) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to London, Ontario
How far is Seattle/Tacoma Intl to London by plane?
The straight-line distance from Seattle/Tacoma Intl to London is 1997.9 mi. By plane, this route typically takes 6h 58m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to London Airport?
Prices for flights from Seattle/Tacoma Intl Airport to London Airport are updated daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to London Airport?
There is 1 operator available for flights from Seattle/Tacoma Intl Airport to London Airport as of April 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to London Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to London Airport.
What documentation or ID do you need to fly to London Airport?
The travel and health documents you'll need for your trip to London 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 Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Seattle to London, Ontario?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to London, Ontario is Air Canada (100% of total bookings).
Best airlines flying from Seattle to London, Ontario
Compare and see reviews for airlines that fly from Seattle to London, Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $205 | Free Cancellation | Rating 7.0 9,245 reviews |
Traveling to a place near London?
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Why should I use momondo to find a flight deal from Seattle to London?
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.
Can I find flights from Seattle to London with flexible booking policies on momondo?
momondo does allow users to show only those flights to London from Seattle which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Seattle to London?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to London.
I’m not ready to book a flight from Seattle to London right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Seattle to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.