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Cheap flights from Chicago to Ontario from C$ 116

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Chicago to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Chicago to Ontario
Explore the most affordable flight options available from Chicago to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 October 2025.

Wed 19/1111:00 a.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sat 22/1111:00 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 29/10C$ 263
Wed 12/1111:00 a.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sun 16/119:15 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 28/10C$ 265
Fri 5/124:15 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sun 7/129:15 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 28/10C$ 267
Thu 13/1111:00 a.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sun 16/119:15 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 27/10C$ 268
Wed 12/1111:00 a.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Thu 13/112:30 p.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 29/10C$ 270
Fri 14/114:15 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sun 16/119:15 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 27/10C$ 271
Sat 6/126:04 a.m.ORD - YYZ
1 stop4h 52mAmerican Airlines
Sun 7/126:24 p.m.YYZ - ORD
Nonstop2h 00mAmerican Airlines
Deal found 27/10C$ 271
Thu 13/1111:00 a.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Fri 14/112:30 p.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 28/10C$ 274
Fri 5/128:10 a.m.ORD - YYZ
Nonstop1h 46mAmerican Airlines
Mon 8/124:13 p.m.YYZ - ORD
1 stop7h 41mAmerican Airlines
Deal found 27/10C$ 279
Fri 5/128:15 p.m.ORD - YYZ
Nonstop1h 39mAir Canada
Sun 7/127:00 a.m.YYZ - ORD
1 stop5h 18mAir Canada
Deal found 29/10C$ 284
Thu 4/128:00 a.m.ORD - YYZ
Nonstop1h 40mAir Canada
Sun 7/127:00 a.m.YYZ - ORD
1 stop5h 18mAir Canada
Deal found 29/10C$ 285
Fri 21/1111:00 a.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Wed 3/129:15 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 29/10C$ 288

Cheap flight deals from Chicago to Ontario

Keep the following information in mind while searching for Chicago to Ontario flight deals. Data was last updated 29 October 2025.

Round-trip from

C$ 265

One-way from

C$ 116

Popular in

January

Cheapest in

September

Average price

C$ 418

Good round-trip deal

C$ 398 or less

Good one-way deal

C$ 142 or less
Porter Airlines
  • Porter Airlines
  • 12/11-17/11
  • Nonstop
  • 3h 32m total
  • Chicago to Ontario
Search Deals
Porter Airlines
  • Porter Airlines
  • 12/12
  • Nonstop
  • 1h 42m total
  • Chicago to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Chicago (CHI) to Ontario.
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to Ontario.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 29 October 2025.
Use the filters below to find and compare flights from Chicago to Ontario that are best for you.

Fly from

Chicago

Fly to

Ontario

Route

Depart

Return

Price

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 5/12

4:15 p.m.-6:57 p.m.

Nonstop1h 42m

Toronto Island

Sun 7/12

9:15 a.m.-10:05 a.m.

Nonstop1h 50m

C$ 265

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 4/3

11:00 a.m.-1:42 p.m.

Nonstop1h 42m

Toronto Island

Sat 7/3

11:00 a.m.-11:50 a.m.

Nonstop1h 50m

C$ 268

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 5/3

11:00 a.m.-1:42 p.m.

Nonstop1h 42m

Toronto Island

Sat 7/3

11:00 a.m.-11:50 a.m.

Nonstop1h 50m

C$ 268

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 13/11

11:00 a.m.-1:42 p.m.

Nonstop1h 42m

Toronto Island

Sun 16/11

9:15 a.m.-10:05 a.m.

Nonstop1h 50m

C$ 268

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Tue 3/3

11:00 a.m.-1:42 p.m.

Nonstop1h 42m

Toronto Island

Sat 7/3

11:00 a.m.-11:50 a.m.

Nonstop1h 50m

C$ 268

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 12/11

11:00 a.m.-1:42 p.m.

Nonstop1h 42m

Toronto Island

Thu 13/11

2:30 p.m.-3:20 p.m.

Nonstop1h 50m

C$ 270

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 14/11

4:15 p.m.-6:57 p.m.

Nonstop1h 42m

Toronto Island

Sun 16/11

9:15 a.m.-10:05 a.m.

Nonstop1h 50m

C$ 271

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 12/11

11:00 a.m.-1:42 p.m.

Nonstop1h 42m

Toronto Island

Sat 22/11

11:00 a.m.-11:50 a.m.

Nonstop1h 50m

C$ 275

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 16/12

6:00 a.m.-11:48 a.m.

1 stop4h 48m

Toronto Pearson Intl

Fri 16/1

5:30 p.m.-6:50 p.m.

Nonstop2h 20m

C$ 307

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 27/2

12:45 p.m.-7:17 p.m.

1 stop5h 32m

Toronto Pearson Intl

Sun 1/3

8:55 a.m.-10:02 a.m.

Nonstop2h 07m

C$ 307

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 60 results
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Best time to book a flight from Chicago to Ontario

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

Cheapflights Insights

Everything you need to know about your flight from Chicago to Ontario

What is the cheapest month to book a flight from Chicago to Region of Ontario?

Currently, March is the cheapest month in which you can book a flight from Chicago to Region of Ontario (average of C$ 148). Flying from Chicago to Region of Ontario in July is currently the most expensive (average of C$ 242). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CHI to ON?

Find hourly flight availability from Chicago to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 October 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 44% on flights from Chicago to Region of Ontario by exploring options for tickets in the evening.

What is the cheapest day to fly from Chicago to Region of Ontario?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Ontario. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Chicago to Region of Ontario flight should consider departing on Thursday at noon when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Chicago to Region of Ontario?

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 29 October 2025.
Read reviews from past customers who have flown Porter Airlines,United Airlines, andAir Canada from Chicago to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Overall

8.0

Food

7.6

Comfort

8.0

Boarding

8.2

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
8.0
Very good
384 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Overall

8.0

Food

7.6

Comfort

8.0

Boarding

8.2

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
9,001 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Overall

8.0

Food

7.6

Comfort

8.0

Boarding

8.2

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,371 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Crew

8.6

Overall

8.0

Food

7.6

Comfort

8.0

Boarding

8.2

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago to Region of Ontario?

    A quick flight from Chicago to Region of Ontario can take about 1h 42m. Porter Airlines provides one of the quickest options available for as low as C$ 265. Chicago and Region of Ontario are separated by a distance of 711 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Chicago to Region of Ontario one-way?

    To fly one-way, consider booking your trip with Porter Airlines, which is currently one of the cheapest options available, starting at C$ 116. Delta flights start at C$ 124 while deals on Air Canada start at C$ 127 one-way.

  • What are the most popular routes from Chicago to Region of Ontario?

    While some choose either Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl or Chicago Midway - Toronto Island, Chicago O'Hare Intl - Toronto Pearson Intl is the most popular route from Chicago to Region of Ontario.

  • What are the most reliable airlines from Chicago to Region of Ontario?

    Before booking your flight to Region of Ontario from Chicago, check out the most reliable airlines to get you to your destination on time: Finnair (92%), Qatar Airways (91%), British Airways( 89%).

  • What are the cheapest flights from Chicago to Region of Ontario?

    The cheapest flight price from Chicago to Region of Ontario is C$ 113. On average you can expect to pay C$ 407. The most popular route, (Chicago O'Hare Intl - Toronto Pearson Intl), can usually be booked for C$ 232.

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

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

  • How can I find direct flights from Chicago to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Chicago 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.

  • What is the cheapest month to book a flight from Chicago to Region of Ontario?

    Currently, March is the cheapest month in which you can book a flight from Chicago to Region of Ontario (average of C$ 148). Flying from Chicago to Region of Ontario in July is currently the most expensive (average of C$ 242). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Chicago to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Chicago to Ontario

Discover the top 2 airlines that operate flights from Chicago to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 29 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 206AverageC$ 364FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 263AverageC$ 371FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Chicago to Ontario?

Deals for Chicago to Ontario flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Chicago to Ontario?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Chicago to Ontario.

Can Cheapflights find flights from Chicago to Ontario with no change fees?

Yes, we can. To see specific flights from Chicago to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Chicago to Ontario become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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