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Cheap flights from Chicago to Ontario from C$ 84

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 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
28 Feb — 7 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 January 2026.

Fri 3/44:15 p.m.
MDW
-
YTZ
Nonstop1h 42m
Porter Airlines
Mon 6/49:15 a.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 27/1C$ 255
Fri 13/37:15 a.m.
ORD
-
YTZ
1 stop6h 10m
Air Canada
Sun 22/310:45 a.m.
YTZ
-
ORD
1 stop5h 10m
Air Canada
Deal found 29/1C$ 255
Thu 19/28:00 a.m.
ORD
-
YYZ
Nonstop1h 40m
Air Canada
Mon 23/26:40 p.m.
YYZ
-
ORD
Nonstop2h 00m
Air Canada
Deal found 27/1C$ 257
Sat 14/312:50 p.m.
ORD
-
YTZ
1 stop6h 05m
Air Canada
Sat 21/37:00 a.m.
YTZ
-
ORD
1 stop5h 18m
Air Canada
Deal found 28/1C$ 258
Thu 19/211:05 a.m.
MDW
-
YTZ
Nonstop1h 42m
Porter Airlines
Sat 21/211:05 a.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 27/1C$ 261
Fri 13/32:00 p.m.
ORD
-
YYZ
Nonstop1h 39m
Air Canada
Sun 22/36:15 a.m.
YYZ
-
ORD
1 stop5h 55m
Air Canada
Deal found 29/1C$ 261
Sat 14/310:00 a.m.
ORD
-
YYZ
Nonstop1h 40m
Air Canada
Sat 21/310:00 a.m.
YYZ
-
ORD
1 stop5h 55m
Air Canada
Deal found 28/1C$ 262
Sat 4/412:45 p.m.
MDW
-
YTZ
Nonstop1h 42m
Multiple Airlines
Sat 11/411:00 a.m.
YTZ
-
MDW
Nonstop1h 50m
Multiple Airlines
Deal found 27/1C$ 263
Thu 7/510:25 a.m.
MDW
-
YUL
1 stop5h 50m
Porter Airlines
Sun 10/512:25 p.m.
YUL
-
MDW
1 stop5h 25m
Porter Airlines
Deal found 27/1C$ 265
Tue 17/211:05 a.m.
MDW
-
YTZ
Nonstop1h 42m
Porter Airlines
Thu 19/29:20 a.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 27/1C$ 265
Sat 11/412:45 p.m.
MDW
-
YTZ
Nonstop1h 42m
Multiple Airlines
Sun 12/49:15 a.m.
YTZ
-
MDW
Nonstop1h 50m
Multiple Airlines
Deal found 27/1C$ 266
Thu 16/411:00 a.m.
MDW
-
YTZ
Nonstop1h 42m
Porter Airlines
Sun 19/49:15 a.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 27/1C$ 267

Find 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 January 2026.

Round-trip from

C$ 255

One-way from

C$ 84

Popular in

January

Cheapest in

September

Average price

C$ 419

Good round-trip deal

C$ 179 or less

Good one-way deal

C$ 196 or less
Porter Airlines
  • Porter Airlines
  • 3/4-6/4
  • Nonstop
  • 3h 32m total
  • Chicago to Ontario
Search Deals
Porter Airlines
  • Porter Airlines
  • 18/2
  • 1 total stop
  • 4h 25m total
  • Chicago to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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.
Search Deals

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 January 2026.
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 3/4

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

Nonstop1h 42m

Toronto Island

Mon 6/4

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

Nonstop1h 50m

C$ 255

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Fri 13/3

7:15 a.m.-2:25 p.m.

1 stop6h 10m

Toronto Island

Sun 22/3

10:45 a.m.-2:55 p.m.

1 stop5h 10m

C$ 255

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Sun 15/3

3:35 p.m.-9:35 p.m.

1 stop5h 00m

Toronto Island

Sun 22/3

10:45 a.m.-2:55 p.m.

1 stop5h 10m

C$ 255

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 8/4

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

Nonstop1h 42m

Toronto Island

Sat 11/4

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

Nonstop1h 50m

C$ 265

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sat 11/4

12:45 p.m.-3:27 p.m.

Nonstop1h 42m

Toronto Island

Sun 12/4

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

Nonstop1h 50m

C$ 266

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 27/2

11:05 a.m.-1:47 p.m.

Nonstop1h 42m

Toronto Island

Sun 1/3

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

Nonstop1h 50m

C$ 267

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 29/5

10:25 a.m.-1:05 p.m.

Nonstop1h 40m

Toronto Island

Sun 31/5

8:50 a.m.-9:40 a.m.

Nonstop1h 50m

C$ 267

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Tue 17/2

11:05 a.m.-1:47 p.m.

Nonstop1h 42m

Toronto Island

Thu 19/2

9:20 a.m.-10:10 a.m.

Nonstop1h 50m

C$ 267

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 7/5

10:25 a.m.-1:05 p.m.

Nonstop1h 40m

Toronto Island

Mon 11/5

4:00 p.m.-4:50 p.m.

Nonstop1h 50m

C$ 267

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Sat 14/3

12:50 p.m.-7:55 p.m.

1 stop6h 05m

Toronto Island

Sat 21/3

7:00 a.m.-11:18 a.m.

1 stop5h 18m

C$ 274

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/1

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$ 107). Flying from Chicago to Region of Ontario in January is currently the most expensive (average of C$ 240). 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 January 2026.

Unlike at noon, 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 24 January 2026.

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. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago to Region of Ontario

Explore weekly flight availability from Chicago to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 29 January 2026.

The most flights from CHI to CAON are scheduled on a Monday (66 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (41 on average).

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 January 2026.
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
7.9
Good
412 reviews
Check prices

Crew

8.6

Boarding

8.2

Comfort

7.9

Entertainment

6.9

Food

7.5

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Crew

8.6

Boarding

8.2

Comfort

7.9

Entertainment

6.9

Food

7.5

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,215 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Crew

8.6

Boarding

8.2

Comfort

7.9

Entertainment

6.9

Food

7.5

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,667 reviews
Porter Airlines
7.9
Good
412 reviews
Check prices

Crew

8.6

Boarding

8.2

Comfort

7.9

Entertainment

6.9

Food

7.5

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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$ 255. 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$ 86. United Airlines flights start at C$ 94 while deals on American Airlines start at C$ 110 one-way.

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

    While some choose either Chicago O'Hare Intl - Toronto Pearson Intl or Chicago Midway - Toronto Pearson Intl, Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau 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: Korean Air (88%), Alaska Airlines (73%), Japan Airlines( 72%).

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

    The cheapest flight price from Chicago to Region of Ontario is C$ 129. On average you can expect to pay C$ 438. The most popular route, (Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl), can usually be booked for C$ 277.

  • 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$ 107). Flying from Chicago to Region of Ontario in January is currently the most expensive (average of C$ 240). 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 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 165AverageC$ 349FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 206AverageC$ 335FlexibilityNo 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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