Cheap flights from London, Ontario to Seattle from C$ 337
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London, Ontario to Seattle departing on 6/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Early arrival? Instantly customize your resultsTrusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from London, Ontario to Seattle
Cheap round-trip flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
Cheap bus & train deals from London, Ontario to Seattle
All round-trip flight deals from London, Ontario to Seattle
WestJet flights from London, Ontario to Seattle
Our best WestJet deals on London, Ontario to Seattle flight tickets
See travel insights to Seattle from
How to get the cheapest flight ticket from London, Ontario to Seattle
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 Seattle?
Our data shows that Monday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 0. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around C$ 734. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.
What is the cheapest time of day to depart on your flight to Seattle?
Our most recent data shows that the best time of day to fly to Seattle is at noon. Flights from London, Ontario to Seattle during this time can be as low as C$ 0. Flights in the morning are often more expensive with an average ticket price of C$ 589.
What is the cheapest airline that flies from London to Seattle/Tacoma Intl?
United Airlines is the most popular carrier operating from London to Seattle/Tacoma Intl
Which airlines fly to Seattle?
Air Canada, Alaska Airlines and WestJet are the top three most popular airlines that fly to Seattle from London, Ontario according to our data. Air Canada is the first choice among our users, with 40% of people opting to fly with this airline when travelling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
When to book flights from London, Ontario to Seattle
Cheap London, Ontario to Seattle (YXU to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London, Ontario to Seattle
How far is London to Seattle/Tacoma Intl by plane?
The distance between London and Seattle/Tacoma Intl is about 3215.2 km. By plane, this route typically takes 10h 08m.
When did momondo last update prices for flights from London Airport to Seattle/Tacoma Intl Airport?
Prices for flights from London Airport to Seattle/Tacoma Intl Airport were last updated today.
How many operators does momondo search for flights from London Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from London Airport to Seattle/Tacoma Intl Airport is 1 as of January 2025.
How old do you have to be to fly from London Airport to Seattle/Tacoma Intl 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 London Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from London, Ontario to Seattle?
Based on momondo bookings for flights between London, Ontario and Seattle, the leading airline is Air Canada, making up 100% of the total bookings.
Best airlines flying from London, Ontario to Seattle
Compare and see reviews for airlines that fly from London, Ontario to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 311 | Free Cancellation | Rating 7.2 2,829 reviews | |||
| PriceFrom C$ 376 | Free Cancellation | Rating 7.0 8,633 reviews |
Travelling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from London to Seattle?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Seattle . Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from London to Seattle with flexible booking policies on momondo?
Flights from London to Seattle 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.
How can momondo help me find flights from London to Seattle?
Once you have performed a search for London to Seattle 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.
I’m not ready to book a flight from London to Seattle right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of London to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.