Cheap flights from Seattle (SEA) to London (YXU)

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

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to London, Ontario as you normally would.

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

Saturday flights are found to be more expensive to fly from Seattle to London, Ontario. 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 London, Ontario.

Cheap flights from Seattle to London in October, November 2021

The best prices found for SEA to YXU flights for October, November
22 Nov - 25 Nov
$695pp
SEA
Seattle/Tacoma Intl
Air Canada
   
2 STOPS
YXU
London
YXU
London
Air Canada
 
1 STOP
SEA
Seattle/Tacoma Intl
22 Nov - 25 Nov
$806pp
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
YXU
London
YXU
London
Air Canada
 
1 STOP
SEA
Seattle/Tacoma Intl

Seattle/Tacoma Intl to London 2021 flight deals

Cheap flights to London from Seattle found for this year
22 Nov - 25 Nov
$695pp
SEA
Seattle/Tacoma Intl
Air Canada
   
2 STOPS
YXU
London
YXU
London
Air Canada
 
1 STOP
SEA
Seattle/Tacoma Intl
22 Nov - 25 Nov
$806pp
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
YXU
London
YXU
London
Air Canada
 
1 STOP
SEA
Seattle/Tacoma Intl

Related info for your journey

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

Flight FAQs

From Seattle to London

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

Air Canada is one of the carriers that may have flexible change policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from Seattle to London, Ontario for under $700 on Cheapflights?

Yes, there are multiple flights from Seattle to London, Ontario for under $700. The cheapest flight booked recently is on Air Canada for just $695, but on average you can expect to pay $1,319.

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

On average you can expect to pay $493 for a flight from Seattle to London, Ontario. The cheapest flight overall is $272 while the most popular route, (Seattle/Tacoma Intl - London) is currently priced at $695.

COVID Restrictions

View COVID Travel Restrictions for London, Canada

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

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

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

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.

Documents
Compassionate entry for travellers and limited release from quarantine - Foreign nationals traveling without an advance written approval for an exemption of a border restriction may be denied entry into Canada.


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

Returning to Seattle/Tacoma Intl from London

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

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

Hide COVID Travel Restrictions for London, Canada

Alternative routes for Seattle to London

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for London

Things to know before you go - useful duration and weather info for your trip from Seattle to London.
Today's exchange rate
$1 = C$ 1.24
Average temperature for October in London
59.0 °F
Avg rainfall for October in London
2.6 ″

Airports servicing Seattle

Airports servicing London

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