Cheap flights from London to Seattle

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Seattle (SEA)
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How to find the cheapest flight from
London (YXU) to Seattle (SEA)

All the information you need to plan the best YXU to SEA flight in 2021: compare London to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.
What is the cheapest day to fly round-trip from London, Ontario to Seattle?

Flights from London, Ontario to Seattle are generally found to be more expensive on Saturday. This shouldn't discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Seattle.

What is the cheapest month to fly from London, Ontario to Seattle?

The best pricing can be found in the month of June. Prices to Seattle from London, Ontario average C$ 660. You can even find prices in June for less than C$ 660, as users have found deals to Seattle from as low as C$ 500. The month of October appears to be one of the more expensive times to travel to Seattle from London, Ontario. Flying in the targeted month can save you up to 42%.

When is the cheapest time to fly from London, Ontario to Seattle (YXU - SEA)?

One of the essential ways to save on airfare from London, Ontario to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 15% on airfare.

Related info for your journey

Useful info, stats and facts about <span class="emphasized">London</span> to <span class="emphasized">Seattle</span> flights.

Flight FAQs

From London to Seattle

Which airlines flying from London to Seattle/Tacoma Intl have flexible cancellations due to COVID-19?

Air Canada and WestJet are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from London, Ontario to Seattle for under C$ 1,800 on Cheapflights?

Yes, there are multiple flights from London, Ontario to Seattle for under C$ 1,800. The cheapest flight booked recently is on United Airlines for just C$ 1,790, but on average you can expect to pay C$ 1,792.

How popular is this London, Ontario to Seattle flight route?

The London to Seattle/Tacoma Intl flight path was viewed by 22 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What is the cheapest airline to fly from London, Ontario to Seattle round-trip?

According to our current data, United Airlines (C$ 1,790), offers the cheapest pricing from London, Ontario to Seattle.

What are the cheapest flights from London, Ontario to Seattle?

The cheapest flight price from London, Ontario to Seattle is C$ 303. On average you can expect to pay C$ 303. The most popular route, (London - Seattle/Tacoma Intl), can usually be booked for C$ 1,109.

COVID Restrictions

View COVID Travel Restrictions for Seattle, WA

Do I need a COVID test to fly to Seattle from London?

Information is based on travel restrictions from London to Seattle/Tacoma Intl

Most visitors from London need to provide a negative COVID-19 test result and/or quarantine to enter Seattle/Tacoma Intl.

COVID-19 testing requirements
Visitors from London must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from London are not required to quarantine after entering Seattle/Tacoma Intl.

Do I need a test to fly back to London from Seattle?

Returning to London from Seattle/Tacoma Intl

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) test taken 72 hours before departing to London.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering London.

Hide COVID Travel Restrictions for Seattle, WA

Destination information for Seattle

Things to know before you go - useful duration and weather info for your trip from London to Seattle.
Today's exchange rate
C$ 1 = $0.79
Average temperature for December in Seattle
8.0 °C
Avg rainfall for December in Seattle
135.0 mm

Airports servicing London

Airports servicing Seattle

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