Cheap flights from Toronto to Seattle-Tacoma International

Round-trip
Economy
Toronto (YTO)
Seattle (SEA)
Depart
Return
Any month
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The best prices from Toronto to Seattle-Tacoma International are usually found in January or February, booked 49 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

How to find the cheapest flight from
Toronto (YTO) to Seattle-Tacoma International (SEA)

All the information you need to plan the best YTO to SEA flight in 2021: compare Toronto to Seattle-Tacoma International flight prices with the expected peak season, weather and rainfall in Seattle-Tacoma International.
YTO - SEA
Price
C$ 478 - C$ 638

Popular in

December

High demand for flights, 14% potential price rise

Cheapest in

January

Best time to find cheap flights, 13% potential price drop

Round-trip from

C$ 478

From Toronto to Seattle-Tacoma International

One-way from

C$ 303

One-way flight from Toronto to Seattle-Tacoma International

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Toronto to Seattle-Tacoma International?

Travellers have found that booking a Monday departure is the best way to save up to 12% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

How far in advance should I book a flight from Toronto to Seattle-Tacoma International?

To save on the cost of your flight from Toronto to Seattle-Tacoma International, book at least 46 days before your planned departure. Booking around this time can save you about 14% on the cost of this flight compared to booking a flight leaving this week. We have found prices from C$ 644 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as C$ 663.

When is the cheapest time to fly from Toronto to Seattle-Tacoma International (YTO - SEA)?

A simple way to save on the total cost of your ticket is to fly from Toronto to Seattle-Tacoma International at noon. If you’re flexible enough to do this you can expect to save up to 5% on your trip compared to booking a flight in the morning.

Cheap flights from Toronto to Seattle-Tacoma International in April, May 2021

The best prices found for YTO to SEA flights for April, May
10 May - 18 May
C$ 502pp
YYZ
Toronto Pearson Intl
American Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl
11 May - 18 May
C$ 504pp
YYZ
Toronto Pearson Intl
American Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl
19 May - 20 May
C$ 505pp
YYZ
Toronto Pearson Intl
American Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl

Toronto to Seattle-Tacoma International 2021 flight deals

Cheap flights to Seattle-Tacoma International from Toronto found for this year
10 May - 18 May
C$ 502pp
YYZ
Toronto Pearson Intl
American Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl
11 May - 18 May
C$ 504pp
YYZ
Toronto Pearson Intl
American Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl
19 May - 20 May
C$ 505pp
YYZ
Toronto Pearson Intl
American Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl

Direct flights to Seattle-Tacoma International from Toronto

Save time with Toronto to Seattle-Tacoma International direct flight deals
12 Aug - 16 Aug
C$ 528pp
YYZ
Toronto Pearson Intl
Air Canada
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
Direct
YYZ
Toronto Pearson Intl
12 Aug - 16 Aug
C$ 549pp
YYZ
Toronto Pearson Intl
Air Canada
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
Direct
YYZ
Toronto Pearson Intl
18 Aug - 28 Aug
C$ 627pp
YYZ
Toronto Pearson Intl
Air Canada
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
Direct
YYZ
Toronto Pearson Intl

Last minute flights from Toronto to Seattle-Tacoma International

Late deals on round-trip flights to Seattle-Tacoma International from Toronto, departing today and this week
26 Apr - 2 Jun
C$ 560pp
YYZ
Toronto Pearson Intl
American Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl
26 Apr - 1 Jun
C$ 565pp
YYZ
Toronto Pearson Intl
American Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl
29 Apr - 3 Jun
C$ 572pp
YYZ
Toronto Pearson Intl
United Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
United Airlines
 
1 STOP
YYZ
Toronto Pearson Intl

One-way flights to Seattle-Tacoma International from Toronto

The cheapest one-way flights from Toronto to Seattle-Tacoma International
12:59 p.m. - 6:35 p.m.
Delta
1 stop
8h 36m
YYZ - SEA
Delta
C$ 303
Delta
2:10 a.m. - 10:43 a.m.
WestJet
1 stop
11h 33m
YHM - SEA
WestJet
C$ 335
WestJet
4:40 a.m. - 1:01 p.m.
United Airlines
1 stop
11h 21m
YYZ - SEA
United Airlines
C$ 336
United

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Toronto</span> to <span class="emphasized">Seattle-Tacoma International</span> flights.

Flight FAQs

From Toronto to Seattle-Tacoma International

Can I find flights from Toronto to Seattle-Tacoma International for under C$ 626 on Cheapflights?

Yes, there are multiple flights from Toronto to Seattle-Tacoma International for under C$ 626. The cheapest flight booked recently is on American Airlines for just C$ 502, but on average you can expect to pay C$ 522.

What safety measures are being taken by airlines flying from Toronto to Seattle/Tacoma Intl to control the spread of COVID-19?

Delta is one of the many airlines that have implemented additional safety measures to control the spread of COVID-19. Airline carriers are regularly disinfecting and sanitizing their aircraft. Masks are provided and are mandatory while on board. Pre-flight testing for symptoms and antibodies, alongside socially-distanced seating (for a limited time) will work towards keeping travellers safer while flying from Toronto to Seattle/Tacoma Intl. Policies will vary by airline.

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

Due to the rapidly changing circumstances due to COVID-19, airlines like Air Canada, United Airlines, and American Airlines flying from Toronto to Seattle/Tacoma Intl have implemented new flexible cancellation policies.

Are there direct flights from Toronto to Seattle-Tacoma International for under C$ 626 on Cheapflights?

Cheapflights has 3 direct flights from Toronto to Seattle-Tacoma International under C$ 626. A good price for a direct flight from Toronto to Seattle-Tacoma International is less than C$ 568.

Are there last-minute flights available from Toronto to Seattle-Tacoma International for under C$ 626?

There are currently 20+ open flights from Toronto to Seattle-Tacoma International within the next 7 days for less than C$ 626.

Is Toronto weather warmer or cooler than Seattle?

With an average temperature of 25 °C, peak weather can be found in July. As a traveller, expect to see changes in flight prices during that period. The temperatures in Seattle are the same as in Toronto.

How long is the flight from Toronto to Seattle-Tacoma International?

Airlines like Air Canada, United Airlines, and Delta fly from Toronto to Seattle-Tacoma International in about 5h 21m. The time it takes to get you to your destination can typically vary by up to 3h 15m. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines to flying from Toronto to Seattle-Tacoma International round-trip?

According to our current data, American Airlines (C$ 502), Delta (C$ 512), and Air Canada (C$ 527) offers the cheapest pricing from Toronto to Seattle-Tacoma International. American Airlines is currently priced 8% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Toronto to Seattle-Tacoma International one-way?

The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as C$ 239. However, be on the lookout for offers from American Airlines and WestJet, as they are both options that can get you from Toronto to Seattle-Tacoma International for a low price.

Destination information for Seattle-Tacoma International

Things to know before you go - useful duration and weather info for your trip from Toronto to Seattle-Tacoma International.
Today's exchange rate
C$ 1 = $0.80
Flight duration
4h 59m

Airports servicing Toronto

Billy Bishop Toronto City Airport (YTZ)
Hamilton (YHM)
Kitchener (YKF)

Airports servicing Seattle

Top 5 airlines flying from Toronto to Seattle-Tacoma International

The chart below displays the airlines Cheapflights users travelling from Toronto to Seattle-Tacoma International choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Delta
C$ 273 C$ 469 No cancel fee N/A
Search Delta flights
American Airlines
C$ 261 C$ 504 No cancel fee 71%
Search American Airlines flights
WestJet
C$ 255 C$ 525 No cancel fee 60%
Search WestJet flights
United Airlines
C$ 404 C$ 567 No cancel fee 69%
Search United Airlines flights
Air Canada
C$ 319 C$ 637 No cancel fee 67%
Search Air Canada flights
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