In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

What is the cheapest time of day to fly from SWF to ONT?

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

Most accurate provider : When it comes to deals on New Windsor-Ontario flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on New Windsor-Ontario flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from New Windsor-Ontario flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on New Windsor-Ontario flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for New Windsor-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Stewart to Ontario that include hotel bookings?

Yes. In addition to deals on Stewart to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Stewart to Ontario?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stewart to Ontario.

Can I find deals for business class flights from Stewart to Ontario?

Yes. Cheapflights offers flight deals from Stewart to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$187+ Cheap Flights from New Windsor to Ontario

Q: E

Most trusted provider : When it comes to deals on New Windsor-Ontario flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for New Windsor-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Q: Can I find deals for flights from Stewart to Ontario that include hotel bookings?

Yes. In addition to deals on Stewart to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

Q: How can I find direct flights from Stewart to Ontario?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stewart to Ontario.

Q: Can I find deals for business class flights from Stewart to Ontario?

Yes. Cheapflights offers flight deals from Stewart to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Cheap flight deals from Stewart to Ontario

One-way

One-way flights from Stewart to Ontario
Search for one-way flight options from Stewart to Ontario. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.

Wed 11/1112:39 pm -

3 stops24h 56m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/27

$187

Mon 10/197:01 pm -

3 stops42h 28m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/25

$189

Sat 10/2412:39 pm -

2 stops14h 11m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/24

$194

Sun 10/2511:58 am -

3 stops49h 37m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/24

$201

Wed 10/2812:39 pm -

2 stops14h 12m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/24

$206

Mon 12/711:03 am -

3 stops38h 14m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/26

$215

Wed 10/2112:39 pm -

2 stops14h 11m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/25

$224

Find flight deals from Stewart to Ontario

Most accurate provider	Expedia 1 star
Most trusted provider	Expedia 3 stars
Popular in	June
Cheapest in	January
Average price	$450

Provider with most accurate pricing for New Windsor Stewart-Ontario flight deals.

Search Deals

Provider most trusted by Cheapflights users for New Windsor Stewart-Ontario flights.

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($51 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

New WindsorOntario

SWF New Windsor Stewart - ONT Ontario

SWFONT

New Windsor Stewart

Wed 11/11

12:39 pm-10:35 am

3 stops24h 56m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$187

Quickest round-trip

New WindsorOntario

SWF New Windsor Stewart - ONT Ontario

SWFONT

New Windsor Stewart

Sat 10/24

12:39 pm-11:50 pm

2 stops14h 11m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$194

New WindsorOntario

SWF New Windsor Stewart - ONT Ontario

SWFONT

New Windsor Stewart

Sun 10/25

11:58 am-10:35 am

3 stops49h 37m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$201

New WindsorOntario

SWF New Windsor Stewart - ONT Ontario

SWFONT

New Windsor Stewart

Sun 11/22

6:48 pm-5:23 pm

3 stops25h 35m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$244

New WindsorOntario

SWF New Windsor Stewart - ONT Ontario

SWFONT

New Windsor Stewart

Thu 1/14

10:56 am-7:07 am

2 stops23h 11m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$314

New WindsorOntario

SWF New Windsor Stewart - ONT Ontario

SWFONT

New Windsor Stewart

Mon 1/4

12:16 pm-7:07 am

3 stops21h 51m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$325

New WindsorOntario

SWF New Windsor Stewart - ONT Ontario

SWFONT

New Windsor Stewart

Fri 11/6

5:30 pm-10:42 am

2 stops20h 12m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$329

New WindsorOntario

SWF New Windsor Stewart - ONT Ontario

SWFONT

New Windsor Stewart

Wed 11/25

11:06 am-5:23 pm

3 stops33h 17m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$360

New WindsorOntario

SWF New Windsor Stewart - ONT Ontario

SWFONT

New Windsor Stewart

Sat 12/19

12:39 pm-1:43 pm

3 stops52h 04m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$367

New WindsorOntario

SWF New Windsor Stewart - ONT Ontario

SWFONT

New Windsor Stewart

Mon 10/5

12:16 pm-10:30 am

3 stops25h 14m

Ontario

Wed 12/31

12:00 am-3:00 am

Nonstop0h 00m

$373

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/27

Showing 1-10 of 11 resultsSorted by cheapest first

Most accurate provider: When it comes to deals on New Windsor-Ontario flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on New Windsor-Ontario flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from New Windsor-Ontario flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on New Windsor-Ontario flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for New Windsor-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Stewart to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Stewart with our price prediction graph.

SWF-ONT

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Can I find deals for flights from Stewart to Ontario that include hotel bookings?
Yes. In addition to deals on Stewart to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Stewart to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stewart to Ontario.
Can I find deals for business class flights from Stewart to Ontario?
Yes. Cheapflights offers flight deals from Stewart to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

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Popular flights

Alternative routes for Stewart to Ontario

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This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Stewart to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Stewart to Ontario

One-way flights from Stewart to Ontario
Search for one-way flight options from Stewart to Ontario. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.

Search for one-way flight options from Stewart to Ontario. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.

Find flight deals from Stewart to Ontario

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from New Windsor to Ontario that are best for you.

Best time to book a flight from Stewart to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Stewart with our price prediction graph.

Related info for your journey

Can I find deals for flights from Stewart to Ontario that include hotel bookings?

How can I find direct flights from Stewart to Ontario?

Can I find deals for business class flights from Stewart to Ontario?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Stewart to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Stewart to Ontario by cabin class

Find flights from Stewart to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Ontario

Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 28, 2026.

Stewart and Ontario flights

Browse other Stewart and Ontario flight options. Last updated on September 28, 2026.

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$187+ Cheap flights from New Windsor to Ontario (SWF - ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Stewart to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Stewart to Ontario

One-way flights from Stewart to OntarioSearch for one-way flight options from Stewart to Ontario. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.

Search for one-way flight options from Stewart to Ontario. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.

Find flight deals from Stewart to Ontario

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from New Windsor to Ontario that are best for you.

Best time to book a flight from Stewart to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Stewart with our price prediction graph.

Related info for your journey

Can I find deals for flights from Stewart to Ontario that include hotel bookings?

How can I find direct flights from Stewart to Ontario?

Can I find deals for business class flights from Stewart to Ontario?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Stewart to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Stewart to Ontario by cabin class

Find flights from Stewart to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Ontario

Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 28, 2026.

Stewart and Ontario flights

Browse other Stewart and Ontario flight options. Last updated on September 28, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

100% Free

Book with Flexibility

Travel Smart

One-way flights from Stewart to Ontario
Search for one-way flight options from Stewart to Ontario. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.