Menu

Cheap flights from Seattle (SEA) to Ontario (ON)

Know your dates, get live prices in seconds:

From
To
Depart
Return
Any month
Compare vs. Cheapflights |
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime

We work with more than 300 partners to bring you better travel deals

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

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

Travelers have found it’s best to book a flight 61 days in advance to save up to 36% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 61 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Seattle to Ontario 1-2 weeks in advance for as low as $306, or $373 for flights within the next 24 hours.

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

Our data shows that September tends to be the cheapest month to fly to Ontario from Seattle. Users have commonly found prices around $286 for the month, but tickets can be as low as $137. Due to multiple factors, prepare for potentially higher prices in November.

Cheap flights from Seattle to Ontario in October, November 2020

The best prices found for SEA to Ontario flights for October, November
25 Nov - 27 Feb
$188pp
SEA
Seattle/Tacoma Intl
Air Canada
   
2 STOPS
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Air Canada
   
2 STOPS
SEA
Seattle/Tacoma Intl
25 Nov - 27 Feb
$194pp
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Air Canada
   
2 STOPS
SEA
Seattle/Tacoma Intl
25 Nov - 27 Feb
$201pp
SEA
Seattle/Tacoma Intl
Air Canada
   
2 STOPS
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Air Canada
Non-Stop
SEA
Seattle/Tacoma Intl

Seattle to Ontario 2020 flight deals

Cheap flights to Ontario from Seattle found for this year
25 Nov - 27 Feb
$188pp
SEA
Seattle/Tacoma Intl
Air Canada
   
2 STOPS
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Air Canada
   
2 STOPS
SEA
Seattle/Tacoma Intl
25 Nov - 27 Feb
$194pp
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Air Canada
   
2 STOPS
SEA
Seattle/Tacoma Intl
25 Nov - 27 Feb
$201pp
SEA
Seattle/Tacoma Intl
Air Canada
   
2 STOPS
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Air Canada
Non-Stop
SEA
Seattle/Tacoma Intl

Non-stop flights to Ontario from Seattle

Save time with Seattle to Ontario direct flight deals
9 Dec - 3 Jan
$255pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
Non-Stop
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
United Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
24 Dec - 7 Jan
$277pp
SEA
Seattle/Tacoma Intl
Air Canada
Non-Stop
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Air Canada
Non-Stop
SEA
Seattle/Tacoma Intl
18 Apr - 2 May
$361pp
SEA
Seattle/Tacoma Intl
Air Canada
Non-Stop
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Air Canada
Non-Stop
SEA
Seattle/Tacoma Intl

Last minute flights from Seattle to Ontario

Late deals on round-trip flights to Ontario from Seattle, departing today and this week
28 Oct - 4 Nov
$313pp
SEA
Seattle/Tacoma Intl
Major Airline
 
1 STOP
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Major Airline
 
1 STOP
SEA
Seattle/Tacoma Intl
28 Oct - 4 Nov
$316pp
SEA
Seattle/Tacoma Intl
Major Airline
   
2 STOPS
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Major Airline
 
1 STOP
SEA
Seattle/Tacoma Intl
27 Oct - 30 Nov
$358pp
SEA
Seattle/Tacoma Intl
Air Canada
 
1 STOP
YYZ
Toronto Pearson Intl
YYZ
Toronto Pearson Intl
Air Canada
 
1 STOP
SEA
Seattle/Tacoma Intl

One-way flights to Ontario from Seattle

The cheapest one-way flights from Seattle to Ontario
7:45 pm - 10:29 am
Delta
2 Stops
11h 44m
SEA - YYZ
Delta
$201
Delta
11:05 am - 4:09 pm
Multiple Airlines
3 Stops
26h 04m
SEA - YYZ
Multiple Airlines
$216
FlightNetwork
1:18 am - 5:34 pm
American Airlines
2 Stops
37h 16m
SEA - YYZ
American Airlines

Related info for your journey

Useful info, stats and facts about Seattle to Ontario flights.

Flight FAQs

From Seattle to Ontario

Are flight prices decreasing from Seattle to Ontario due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Seattle and Ontario for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

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

Alaska Airlines and Delta are some of the many airlines that have implemented additional safety measures to control the spread of COVID-19. New policies for travelers booking flights from Seattle/Tacoma Intl to Ontario include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

Which airlines flying from Seattle/Tacoma Intl to Ontario 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 Seattle/Tacoma Intl to Ontario have implemented new flexible cancellation policies.

Can I find flights from Seattle to Ontario for under $200 on Cheapflights?

Yes, there are multiple flights from Seattle to Ontario for under $200. The cheapest flight booked recently is on Air Canada for just $188, but on average you can expect to pay $257.

Are there nonstop flights from Seattle to Ontario for under $300 on Cheapflights?

Cheapflights has at least 8 direct flights from Seattle to Ontario under $300. A good price for a nonstop flight from Seattle to Ontario is less than $974.

Are there last-minute flights available from Seattle to Ontario for under $400?

There are currently 20+ open flights from Seattle to Ontario within the next 7 days for less than $400.

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

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

What are the most popular routes from Seattle to Ontario?

Most travelers choose Seattle/Tacoma Intl - Toronto Pearson Intl, Seattle/Tacoma Intl - Toronto Hamilton or Seattle/Tacoma Intl - Ottawa when deciding on the best route from Seattle to Ontario.

What are the cheapest Flights from Seattle to Ontario?

Looking at all options, your cheapest flight can be booked for $243. While the most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl) can be booked for $255 on average our data indicates $602 when flying from Seattle to Ontario

How long is the flight from Seattle to Ontario?

For as low as $287, United Airlines can have you in Ontario from Seattle in 4h 47m. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from Seattle to Ontario round-trip?

Our cheapest airline available from Seattle to Ontario is Air Canada. Our recent data shows that you can find tickets from as low as $188 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $266 and $274 round-trip.

What are the cheapest airlines to fly from Seattle to Ontario one-way?

$118 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from $120 and $146, respectively.

Destination information for Ontario

Things to know before you go. Useful info for your trip from Seattle to Ontario
Today's exchange rate
$1 = C$ 1.32

Airports servicing Seattle

Airports servicing

Chatham-Kent (XCM)
Fort Frances (YAG)
Ste. Marie Marie (YAM)
Attawapiskat (YAT)
Fort Albany (YFA)
Kingston, Ontario (YGK)
Home North America Canada Ontario Cheap flights from Seattle to Ontario