Cheap flights from Ontario to Seattle

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Home North America USA Washington Seattle Cheap flights from Ontario to Seattle

How to find the cheapest flight from
Ontario to Seattle (SEA)

All the information you need to plan the best null to SEA flight in 2021: compare Ontario to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.
How far in advance should I book a flight from Region of Ontario to Seattle?

Users have found that booking a flight from Region of Ontario to Seattle at least 46 days early can save you up to 14% on average compared to booking a flight this week. If booking 46 days before your flight isn’t an option for you, users have found flights from Region of Ontario to Seattle for as little as C$ 651 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as C$ 670 for flights departing within the next 3 days.

When is the cheapest time to fly from Region of Ontario to Seattle (CAON - SEA)?

When flying from Region of Ontario to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap flights from Ontario to Seattle in September, October 2021

The best prices found for Ontario to SEA flights for September, October
24 Oct - 6 Nov
C$ 426pp
YOW
Ottawa
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
     
3 STOPS
YOW
Ottawa
24 Oct - 6 Nov
C$ 435pp
YOW
Ottawa
Air Canada
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
YOW
Ottawa
16 Oct - 20 Oct
C$ 445pp
YYZ
Toronto Pearson Intl
American Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
American Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl

Ontario to Seattle 2021 flight deals

Cheap flights to Seattle from Ontario found for this year
3 Dec - 7 Dec
C$ 306pp
YYZ
Toronto Pearson Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
     
3 STOPS
YYZ
Toronto Pearson Intl
3 Dec - 7 Dec
C$ 311pp
YYZ
Toronto Pearson Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl
7 Nov - 12 Nov
C$ 368pp
YYZ
Toronto Pearson Intl
Multiple Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
YYZ
Toronto Pearson Intl

Direct flights to Seattle from Ontario

Save time with Ontario to Seattle direct flight deals
1 Dec - 9 Dec
C$ 503pp
YYZ
Toronto Pearson Intl
Air Canada
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
Direct
YYZ
Toronto Pearson Intl
15 Dec - 1 Jan
C$ 522pp
YYZ
Toronto Pearson Intl
Air Canada
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
Direct
YYZ
Toronto Pearson Intl
16 Oct - 14 Nov
C$ 549pp
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 Ontario to Seattle

Late deals on round-trip flights to Seattle from Ontario, departing today and this week
7 Oct - 17 Oct
C$ 564pp
YYZ
Toronto Pearson Intl
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
YYZ
Toronto Pearson Intl
7 Oct - 8 Oct
C$ 611pp
YYZ
Toronto Pearson Intl
Delta
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
   
2 STOPS
YYZ
Toronto Pearson Intl
6 Oct - 11 Oct
C$ 612pp
YYZ
Toronto Pearson Intl
Delta
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
YYZ
Toronto Pearson Intl

One-way flights to Seattle/Tacoma Intl from Ontario

The cheapest one-way flights from Ontario to Seattle
1:30 a.m. - 5:44 a.m.
WestJet
1 stop
8h 14m
YOW - SEA
WestJet
C$ 244
WestJet
1:00 p.m. - 5:58 p.m.
Alaska Airlines
1 stop
7h 58m
YYZ - SEA
Alaska Airlines
C$ 258
Alaska Airlines
6:00 a.m. - 7:50 p.m.
Delta
2 stops
16h 50m
YYZ - SEA
Delta
C$ 263
Delta

Related info for your journey

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

Flight FAQs

From Ontario to Seattle

What airport do you fly into for flights to Seattle from Ontario?

Located just 18.4 km from the city centre, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Seattle from Ontario.

Which airlines flying from Ontario 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, WestJet, and United Airlines flying from Ontario to Seattle/Tacoma Intl have implemented new flexible cancellation policies.

Can I find flights from Region of Ontario to Seattle for under C$ 400 on Cheapflights?

Yes, there are multiple flights from Region of Ontario to Seattle for under C$ 400. The cheapest flight booked recently is on Multiple Airlines for just C$ 306, but on average you can expect to pay C$ 401.

Are there direct flights from Region of Ontario to Seattle for under C$ 600 on Cheapflights?

Cheapflights has 20 direct flights from Region of Ontario to Seattle under C$ 600. A good price for a direct flight from Region of Ontario to Seattle is less than C$ 596.

Are there last-minute flights available from Region of Ontario to Seattle for under C$ 600?

There are currently 20+ open flights from Region of Ontario to Seattle within the next 7 days for less than C$ 600.

What days are direct flights available from Region of Ontario to Seattle?

Days when direct flights are available for this flight are: Tuesday, Thursday, Friday, Saturday.

How many flights depart from Region of Ontario to Seattle on average per day?

2 flight departures from Region of Ontario to Seattle per day on average.
Evening (6pm - Midnight) - 100% of flight departures

How long is the flight from Region of Ontario to Seattle?

Departing from Region of Ontario to Seattle will take you 7h 28m. The distance from Region of Ontario to Seattle is about 3325 km. 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 fly from Region of Ontario to Seattle one-way?

For one-way options, check prices for Air Canada. According to our data, you can fly for as low as C$ 230. Users have also found prices from C$ 244 and C$ 255 on WestJet and Delta, respectively.

What are the most popular routes from Region of Ontario to Seattle?

The most popular route from Region of Ontario to Seattle is Toronto Pearson Intl - Seattle/Tacoma Intl. You may also consider Toronto Island - Seattle/Tacoma Intl or Toronto Kitchener-Waterloo - Seattle/Tacoma Intl.

What are the most popular airlines that fly from Region of Ontario to Seattle?

The most popular airlines flying from Region of Ontario to Seattle are Major Airline, American Airlines and Air Canada. Something to consider prior to booking your flight.

What are the cheapest flights from Region of Ontario to Seattle?

Looking at all options, your cheapest flight can be booked for C$ 289. While the most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl) can be booked for C$ 368 on average our data indicates C$ 1,249 when flying from Region of Ontario to Seattle

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COVID Restrictions

View COVID Travel Restrictions for Seattle, WA

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

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

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

COVID-19 testing requirements
Visitors from Ontario 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 Ontario are not required to quarantine after entering Seattle/Tacoma Intl.

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

Returning to Ontario 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 Ontario.

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

Hide COVID Travel Restrictions for Seattle, WA

Departure points for flights from Ontario to Seattle

Select to see more specific information for flights to Seattle from all departure points in Ontario.
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Destination information for Seattle

Things to know before you go - useful duration and weather info for your trip from Ontario to Seattle.
Today's exchange rate
C$ 1 = $0.80
Average temperature for September in Seattle
23.0 °C
Avg rainfall for September in Seattle
26.0 mm

Airports servicing

Chatham-Kent (XCM)
Fort Frances (YAG)
Sault Ste Marie (YAM)
Attawapiskat (YAT)
Fort Albany (YFA)
Kingston (YGK)

Airports servicing Seattle

Seattle (SEA)

Top 5 airlines flying from Ontario to Seattle/Tacoma Intl

The chart below displays the airlines Cheapflights users travelling from Ontario to Seattle 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
American Airlines 		C$ 207 C$ 572 No cancel fee 71%
Search American Airlines flights
United Airlines 		C$ 255 C$ 650 No cancel fee 69%
Search United Airlines flights
Air Canada 		C$ 276 C$ 733 No cancel fee 67%
Search Air Canada flights
WestJet 		C$ 323 C$ 597 No cancel fee 60%
Search WestJet flights
Delta 		C$ 342 C$ 572 No cancel fee N/A
Search Delta flights

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