Flights from Seattle / Tacoma International Airport to Ontario

Flight deals from Seattle / Tacoma International Airport to Ontario

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International Airport to Ontario? If you want to travel next month, return fares start from R 4,947. Find the lowest prices on one-way and return tickets right here.

Toronto.R 1,759 per passenger.Departing Mon, 24 Aug.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Seattle / Tacoma International on Mon, 24 Aug, arriving in Toronto Pearson International.Price includes taxes and charges.From R 1,759, select.

London.R 1,978 per passenger.Departing Fri, 14 Aug.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Seattle / Tacoma International on Fri, 14 Aug, arriving in London.Price includes taxes and charges.From R 1,978, select.

Ottawa.R 2,836 per passenger.Departing Wed, 26 Aug.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Seattle / Tacoma International on Wed, 26 Aug, arriving in Ottawa International.Price includes taxes and charges.From R 2,836, select.

Sault Ste Marie.R 4,134 per passenger.Departing Sun, 18 Oct.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Sun, 18 Oct, arriving in Sault Ste Marie.Price includes taxes and charges.From R 4,134, select.

Windsor.R 4,953 per passenger.Departing Wed, 8 Jul.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Wed, 8 Jul, arriving in Windsor.Price includes taxes and charges.From R 4,953, select.

Thunder Bay.R 5,023 per passenger.Departing Mon, 8 Jun.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Mon, 8 Jun, arriving in Thunder Bay.Price includes taxes and charges.From R 5,023, select.

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Flying from Seattle / Tacoma International Airport to Ontario

Arm yourself with these facts on the fly.

Cheapest flight found	R 1,759
Cheapest month to fly	August
Average flight time	4 hrs, 48 mins
Average flights per week	43
Most popular airline	Alaska Airlines

How to find cheap flights from Seattle / Tacoma International Airport to Ontario

We've compared the best online travel agents and flight providers on the internet to find the cheapest plane tickets from Seattle / Tacoma International Airport to Ontario. Other savvy travellers recently found return flights from R 4,046 and one-way tickets from R 1,759. Ready to join them? Here are a few tips to help you do it the smart way.

Fly in July

The cheapest time to fly from Seattle / Tacoma International Airport to Ontario is currently July.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from Seattle / Tacoma International Airport to anywhere you choose in Ontario.

Watch as fares rise and fall

With Price Alerts, we'll let you know when flight prices from Seattle / Tacoma International Airport to your chosen airport in Ontario go up or down so you can book when the time is just right.

Relax – these are fee-free flight tickets

With us, there are no added fees – the Ontario Airport to Ontario flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

Are there any direct flights from Seattle / Tacoma International Airport to Ontario?

Yes - direct flights currently operate from Seattle / Tacoma International Airport to Toronto Pearson International Airport in Ontario.

What is the average price of a flight from Seattle / Tacoma International Airport to Ontario?

We looked at all of the upcoming return flights from Seattle / Tacoma International Airport to Ontario we could find over the next 12 months. It looks like R 4,046 is the best price. This is good, compared to the average Ontario ticket price of R 9,326.

What is the cheapest month to fly from Seattle / Tacoma International Airport to Ontario?

The cheapest month to fly from Seattle / Tacoma International Airport to Ottawa International Airport is currently August.
The cheapest month to fly from Seattle / Tacoma International Airport to Sudbury Airport is currently July.
The cheapest month to fly from Seattle / Tacoma International Airport to Timmins Airport is currently October.
And the cheapest month to fly from Seattle / Tacoma International Airport to London Airport is usually September.

Which upcoming date is cheapest to fly from Seattle / Tacoma International Airport to Ontario on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle / Tacoma International Airport to Ontario on Tuesday, 28 July 2026.

If I'm flying from Seattle / Tacoma International Airport, where in Ontario is cheapest to fly into?

If you're flying from Seattle / Tacoma International, the cheapest city in Ontario to fly into is Toronto. The cheapest airport serving Toronto at the moment is Toronto Pearson International.