Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Ontario from C$ 142

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Ontario departing on 12/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

Deals available from 900+ travel sites.

"This year, momondo is the #1 place for airfares on the internet."
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Early arrival? Instantly customize your results
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? to track prices.

Find the cheapest flights from Seattle to Ontario

Cheap round-trip flights

These are some of the best round-trip flight deals from Seattle to Ontario that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Seattle to Ontario.

Cheap last-minute flights

Planning a quick getaway from Seattle to Ontario? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Ontario, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Seattle to Ontario

Find recent round-trip train or bus tickets from Seattle to Ontario.

All round-trip flight deals to Ontario

The cheapest plane tickets to Ontario found on KAYAK recently.
7:27 a.m. - 3:05 p.m.SEA-YYZ
4h 38mdirect
7:55 a.m. - 2:21 p.m.YYZ-SEA
9h 26m1 stop
C$ 336
Find Deal
Tue, 4 Feb - Tue, 11 Feb
7:27 a.m. - 3:05 p.m.SEA-YYZ
4h 38mdirect
4:20 p.m. - 6:43 p.m.YYZ-SEA
5h 23mdirect
C$ 338Alaska Airlines
Find Deal
Tue, 4 Feb - Tue, 11 Feb
3:15 p.m. - 6:00 a.m.SEA-YYZ
11h 45m2 stops
7:55 a.m. - 2:21 p.m.YYZ-SEA
9h 26m1 stop
C$ 348WestJet
Find Deal
Tue, 14 Jan - Tue, 21 Jan
3:15 p.m. - 6:00 a.m.SEA-YYZ
11h 45m2 stops
7:55 a.m. - 2:21 p.m.YYZ-SEA
9h 26m1 stop
C$ 379WestJet
Find Deal
Mon, 20 Jan - Mon, 27 Jan
6:05 a.m. - 1:50 p.m.SEA-YYZ
4h 45mdirect
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 417Air Canada
Find Deal
Tue, 4 Feb - Tue, 11 Feb
6:05 a.m. - 1:50 p.m.SEA-YYZ
4h 45mdirect
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 418Air Canada
Find Deal
Tue, 4 Feb - Tue, 11 Feb
5:45 a.m. - 8:15 p.m.SEA-YYZ
11h 30m2 stops
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 450United Airlines
Find Deal
Wed, 5 Feb - Wed, 12 Feb
5:45 a.m. - 8:01 p.m.SEA-YYZ
11h 16m2 stops
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 451United Airlines
Find Deal
Tue, 14 Jan - Tue, 21 Jan
10:55 p.m. - 11:55 a.m.SEA-YYZ
10h 00m1 stop
10:20 a.m. - 6:59 p.m.YYZ-SEA
11h 39m1 stop
C$ 453Delta
Find Deal
Mon, 10 Mar - Fri, 14 Mar
5:40 p.m. - 6:15 a.m.SEA-YYZ
9h 35m1 stop
8:00 a.m. - 1:08 p.m.YYZ-SEA
8h 08m1 stop
C$ 540Delta
Find Deal
Sat, 12 Apr - Sat, 3 May
7:27 a.m. - 3:05 p.m.SEA-YYZ
4h 38mdirect
C$ 142Alaska Airlines
Find Deal
Wed, 12 Feb
3:48 p.m. - 6:43 a.m.SEA-YYZ
11h 55m1 stop
C$ 157
Find Deal
Tue, 25 Feb
11:30 a.m. - 7:23 p.m.SEA-YOW
28h 53m2 stops
C$ 177WestJet
Find Deal
Mon, 27 Jan
3:15 p.m. - 6:00 a.m.SEA-YYZ
11h 45m2 stops
C$ 181WestJet
Find Deal
Thu, 16 Jan
6:05 a.m. - 1:50 p.m.SEA-YYZ
4h 45mdirect
C$ 184Air Canada
Find Deal
Sat, 1 Feb
11:05 p.m. - 11:59 a.m.SEA-YYZ
9h 54m1 stop
C$ 190Delta
Find Deal
Sat, 1 Feb
5:45 a.m. - 7:50 p.m.SEA-YTZ
11h 05m2 stops
C$ 198Air Canada
Find Deal
Tue, 4 Feb
5:00 a.m. - 4:52 p.m.SEA-YYZ
8h 52m1 stop
C$ 198United Airlines
Find Deal
Mon, 17 Mar
7:10 p.m. - 9:58 a.m.SEA-YYZ
11h 48m2 stops
C$ 205United Airlines
Find Deal
Mon, 17 Mar
2:05 p.m. - 12:24 a.m.SEA-YYZ
7h 19m1 stop
C$ 237Delta
Find Deal
Wed, 14 May
9:25 a.m. - 8:55 p.m.SEA-YYZ
8h 30m1 stop
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 855
Find Deal
Wed, 25 Dec - Tue, 14 Jan
7:45 p.m. - 6:15 a.m.SEA-YYZ
7h 30m1 stop
7:55 a.m. - 2:21 p.m.YYZ-SEA
9h 26m1 stop
C$ 864WestJet
Find Deal
Wed, 25 Dec - Tue, 14 Jan
11:35 a.m. - 11:08 p.m.SEA-YYZ
8h 33m2 stops
6:00 a.m. - 10:45 a.m.YYZ-SEA
7h 45m1 stop
C$ 878Delta
Find Deal
Wed, 25 Dec - Tue, 14 Jan
12:31 a.m. - 5:40 p.m.SEA-YYZ
14h 09m1 stop
6:00 a.m. - 7:10 p.m.YYZ-SEA
16h 10m1 stop
C$ 908American Airlines
Find Deal
Fri, 27 Dec - Sat, 18 Jan
12:31 a.m. - 12:30 p.m.SEA-YYZ
8h 59m1 stop
6:15 a.m. - 12:42 p.m.YYZ-SEA
9h 27m1 stop
C$ 924American Airlines
Find Deal
Tue, 24 Dec - Tue, 14 Jan
6:05 a.m. - 1:50 p.m.SEA-YYZ
4h 45mdirect
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 1,078Air Canada
Find Deal
Wed, 25 Dec - Tue, 14 Jan
7:26 a.m. - 3:07 p.m.SEA-YYZ
4h 41mdirect
4:22 p.m. - 6:42 p.m.YYZ-SEA
5h 20mdirect
C$ 1,345Alaska Airlines
Find Deal
Fri, 27 Dec - Thu, 2 Jan
5:45 a.m. - 4:00 p.m.SEA-YOW
7h 15m1 stop
6:00 a.m. - 6:25 p.m.YOW-SEA
15h 25m1 stop
C$ 1,352Air Canada
Find Deal
Fri, 27 Dec - Tue, 31 Dec
7:26 a.m. - 3:07 p.m.SEA-YYZ
4h 41mdirect
4:22 p.m. - 6:42 p.m.YYZ-SEA
5h 20mdirect
C$ 1,473Alaska Airlines
Find Deal
Thu, 26 Dec - Thu, 2 Jan
5:30 p.m. - 6:15 a.m.SEA-YYZ
9h 45m1 stop
1:30 p.m. - 8:50 p.m.YYZ-SEA
10h 20m1 stop
C$ 1,487Delta
Find Deal
Thu, 26 Dec - Thu, 2 Jan
7:27 a.m. - 3:05 p.m.SEA-YYZ
4h 38mdirect
4:20 p.m. - 6:43 p.m.YYZ-SEA
5h 23mdirect
C$ 338Alaska Airlines
Find Deal
Tue, 4 Feb - Tue, 11 Feb
7:27 a.m. - 3:05 p.m.SEA-YYZ
4h 38mdirect
4:20 p.m. - 6:43 p.m.YYZ-SEA
5h 23mdirect
C$ 349Alaska Airlines
Find Deal
Wed, 5 Feb - Wed, 12 Feb
7:27 a.m. - 3:05 p.m.SEA-YYZ
4h 38mdirect
4:20 p.m. - 6:43 p.m.YYZ-SEA
5h 23mdirect
C$ 351Alaska Airlines
Find Deal
Tue, 4 Feb - Tue, 11 Feb
7:27 a.m. - 3:05 p.m.SEA-YYZ
4h 38mdirect
4:20 p.m. - 6:43 p.m.YYZ-SEA
5h 23mdirect
C$ 352Alaska Airlines
Find Deal
Tue, 4 Feb - Tue, 11 Feb
6:05 a.m. - 1:50 p.m.SEA-YYZ
4h 45mdirect
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 417Air Canada
Find Deal
Tue, 4 Feb - Tue, 11 Feb
6:05 a.m. - 1:50 p.m.SEA-YYZ
4h 45mdirect
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 418Air Canada
Find Deal
Tue, 4 Feb - Tue, 11 Feb
6:05 a.m. - 1:50 p.m.SEA-YYZ
4h 45mdirect
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 435
Find Deal
Mon, 20 Jan - Mon, 27 Jan
6:05 a.m. - 1:50 p.m.SEA-YYZ
4h 45mdirect
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 763
Find Deal
Thu, 20 Mar - Wed, 26 Mar
6:05 a.m. - 1:50 p.m.SEA-YYZ
4h 45mdirect
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 1,128United Airlines
Find Deal
Thu, 16 Jan - Sat, 25 Jan
6:05 a.m. - 1:50 p.m.SEA-YYZ
4h 45mdirect
7:05 p.m. - 9:30 p.m.YYZ-SEA
5h 25mdirect
C$ 1,871United Airlines
Find Deal
Wed, 1 Jan - Mon, 6 Jan

United Airlines flights from Seattle to Region of Ontario

Our best United Airlines deals on Seattle to Region of Ontario flight tickets
United Airlines
5 Feb
SEA5:45 a.m.Seattle/Tacoma Intl
11h 30m
2 stops
YYZ8:15 p.m.Toronto Pearson Intl
12 Feb
YYZ7:05 p.m.Toronto Pearson Intl
5h 25m
SEA9:30 p.m.Seattle/Tacoma Intl
United Airlines
14 Jan
SEA5:45 a.m.Seattle/Tacoma Intl
11h 16m
2 stops
YYZ8:01 p.m.Toronto Pearson Intl
21 Jan
YYZ7:05 p.m.Toronto Pearson Intl
5h 25m
SEA9:30 p.m.Seattle/Tacoma Intl
United Airlines
19 Feb
SEA3:04 p.m.Seattle/Tacoma Intl
20h 58m
2 stops
YYZ3:02 p.m.Toronto Pearson Intl
23 Feb
YYZ7:05 p.m.Toronto Pearson Intl
5h 25m
SEA9:30 p.m.Seattle/Tacoma Intl

Air Canada flights from Seattle to Region of Ontario

Our best Air Canada deals on Seattle to Region of Ontario flight tickets
Air Canada
4 Feb
SEA6:05 a.m.Seattle/Tacoma Intl
4h 45m
YYZ1:50 p.m.Toronto Pearson Intl
11 Feb
YYZ7:05 p.m.Toronto Pearson Intl
5h 25m
SEA9:30 p.m.Seattle/Tacoma Intl
Air Canada
4 Feb
SEA6:05 a.m.Seattle/Tacoma Intl
4h 45m
YYZ1:50 p.m.Toronto Pearson Intl
11 Feb
YYZ7:05 p.m.Toronto Pearson Intl
5h 25m
SEA9:30 p.m.Seattle/Tacoma Intl
Air Canada
4 Feb
SEA6:05 a.m.Seattle/Tacoma Intl
4h 45m
YYZ1:50 p.m.Toronto Pearson Intl
11 Feb
YYZ7:05 p.m.Toronto Pearson Intl
5h 25m
SEA9:30 p.m.Seattle/Tacoma Intl

See travel insights to Ontario from

How to get the cheapest flight ticket from Seattle to Region of Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Region of Ontario?

In general, January is the cheapest month to fly from Seattle to Region of Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 420. If you are unable to visit Region of Ontario during the month of January, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around C$ 586.

What is the cheapest day to depart on your flight to Region of Ontario?

The cheapest day to depart from Seattle to Region of Ontario is on a Thursday. Travellers who choose to depart for Region of Ontario on a Thursday will often find tickets for as low as C$ 500. The most expensive day to fly to Region of Ontario is Friday, with ticket prices averaging around C$ 752.

What is the cheapest time of day to depart on your flight to Region of Ontario?

Our most recent data shows that the best time of day to fly to Region of Ontario is in the evening. Flights from Seattle to Region of Ontario during this time can be as low as C$ 415. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 653 on average. Flights to Region of Ontario from Seattle in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Seattle/Tacoma Intl to Ontario flight route?

Fly from Seattle/Tacoma Intl to Toronto Pearson Intl for the best Seattle/Tacoma Intl - Ontario flight prices

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

In general, most travellers find the cheapest time to book a flight to Region of Ontario is about 52 days prior to their departure date, when tickets on average are C$ 754. In the past 72 hours, momondo users found flights from Seattle to Region of Ontario for as low as C$ 529.

What cabin class options are available on Seattle/Tacoma Intl to Ontario flights?

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Region of Ontario flights?

You could potentially save up to 10% on your flight if you consider stops on a Seattle to Region of Ontario flight.

Cheap Seattle to Region of Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Region of Ontario

Best price found

C$ 142

Fastest flight time

4h 35m

Direct flights

Every day

Airports in Region of Ontario

6 airports
The best one-way flight to Region of Ontario from Seattle in the past 72 hours is C$ 142. The best round-trip flight deal from Seattle to Region of Ontario found on momondo in the last 72 hours is C$ 336.
The fastest flight from Seattle to Region of Ontario takes 4h 35m
Direct flights go from Seattle to Region of Ontario every day.
There are 6 airports near Region of Ontario: Ottawa (YOW), Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Region of Waterloo Intl (YKF), Toronto Pearson Intl (YYZ), Toronto Island (YTZ), Hamilton (YHM)

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Ontario?

    Prices for flights from Seattle/Tacoma Intl Airport to Ontario are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Ontario?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Ontario?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Ontario.

  • What documentation or ID do you need to fly to Ontario?

    The travel and health documents required for your trip to Ontario can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Seattle to Region of Ontario?


Best airlines flying from Seattle to Region of Ontario

Compare and see reviews for airlines that fly from Seattle to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 234Free CancellationRating
7.0
8,413 reviews
Search Air Canada flights
Alaska AirlinesPriceFrom C$ 383Free CancellationRating
8.0
9,537 reviews
Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Ontario?

It is quick and easy to find Seattle to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

Can I find flights from Seattle to Ontario with flexible booking policies on momondo?

Yes. All flights to Ontario from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Ontario?

Once all potential Seattle to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Ontario right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


An easier way to manage your Region of Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Fri 27/12
Fri 3/1
Email me momondo's favourite deals

Find better results for your trip to Ontario

Popular Cities in Ontario

Popular flights according to clicks in the last 7 days on momondo