Cheap flights from Ontario to Seattle

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Seattle (SEA)
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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 2022: compare Ontario to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.
When is the cheapest time to fly from Region of Ontario to Seattle (ON - SEA)?

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

How far in advance should I book a flight from Region of Ontario to Seattle?

To save up to 14% on this flight, we recommend booking at least 46 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Region of Ontario to Seattle from C$ 661 1-2 weeks out and tickets from C$ 681 for flights departing within the next 72 hours.

Cheap flights from Ontario to Seattle in May, June 2022

The best prices found for Ontario to SEA flights for May, June
19 Jun - 26 Jun
C$ 457pp
YOW
Ottawa
Air Canada
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
YOW
Ottawa
8 Jun - 15 Jun
C$ 464pp
YOW
Ottawa
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
YOW
Ottawa
6 Jun - 10 Jun
C$ 473pp
YOW
Ottawa
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
YOW
Ottawa

Ontario to Seattle 2022 flight deals

Cheap flights to Seattle from Ontario found for this year
23 Sep - 27 Sep
C$ 415pp
YOW
Ottawa
Air Canada
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
YOW
Ottawa
13 Sep - 18 Sep
C$ 421pp
YOW
Ottawa
WestJet
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
WestJet
   
2 STOPS
YOW
Ottawa
13 Sep - 23 Sep
C$ 424pp
YOW
Ottawa
Air Canada
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
YOW
Ottawa

Direct flights to Seattle from Ontario

Save time with Ontario to Seattle direct flight deals
19 Sep - 26 Sep
C$ 496pp
YYZ
Toronto Pearson Intl
Air Canada
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
Direct
YYZ
Toronto Pearson Intl
19 Sep - 26 Sep
C$ 521pp
YYZ
Toronto Pearson Intl
Air Canada
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air Canada
Direct
YYZ
Toronto Pearson Intl
15 Sep - 19 Sep
C$ 533pp
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
27 May - 5 Jun
C$ 570pp
YYZ
Toronto Pearson Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
YYZ
Toronto Pearson Intl
28 May - 22 Jun
C$ 574pp
YYZ
Toronto Pearson Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
YYZ
Toronto Pearson Intl
27 May - 31 May
C$ 577pp
YYZ
Toronto Pearson Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
YYZ
Toronto Pearson Intl

One-way flights to Seattle/Tacoma Intl from Ontario

The cheapest one-way flights from Ontario to Seattle
2:00 a.m. - 7:59 a.m.
WestJet
1 stop
8h 59m
YHM - SEA
WestJet
C$ 268
WestJet
6:30 p.m. - 3:05 a.m.
Multiple Airlines
1 stop
11h 35m
YYZ - SEA
Multiple Airlines
C$ 275
Kiwi.com
11:20 a.m. - 5:37 p.m.
Air Canada
1 stop
9h 17m
YXU - SEA
Air Canada
C$ 276
Air Canada

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, United Airlines, and Delta 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$ 500 on Cheapflights?

Yes, there are multiple flights from Region of Ontario to Seattle for under C$ 500. The cheapest flight booked recently is on Air Canada for just C$ 415, but on average you can expect to pay C$ 452.

Are there direct flights from Region of Ontario to Seattle for under C$ 500 on Cheapflights?

Cheapflights has 20 direct flights from Region of Ontario to Seattle under C$ 500. A good price for a direct flight from Region of Ontario to Seattle is less than C$ 569.

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 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 Ottawa - Seattle/Tacoma Intl or Toronto Island - Seattle/Tacoma Intl.

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

Looking at all options, your cheapest flight can be booked for C$ 142. While the most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl) can be booked for C$ 443 on average our data indicates C$ 525 when flying from Region of Ontario to Seattle.

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.

Related searches

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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 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) 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) or Antigen (quick-test) test taken 72 hours for RT-PCR (NAAT) and 1 day for Antigen (quick-test) 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.

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 = $0.78
Average temperature for May in Seattle
19.0 °C
Avg rainfall for May in Seattle
45.0 mm

Airports servicing

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

Airports servicing Seattle

Top 6 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$ 210 C$ 515 No cancel fee 71%
Search American Airlines flights
United Airlines
C$ 322 C$ 582 No cancel fee 69%
Search United Airlines flights
Alaska Airlines
C$ 328 C$ 784 No cancel fee 75%
Search Alaska Airlines flights
WestJet
C$ 420 C$ 621 No cancel fee 60%
Search WestJet flights
Air Canada
C$ 429 C$ 692 No cancel fee 67%
Search Air Canada flights
Delta
C$ 470 C$ 610 No cancel fee N/A
Search Delta flights
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