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Ontario

$58+ Cheap flights from Illinois to Ontario

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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Illinois to Ontario

Cheapest flights from Illinois to Ontario
Explore the most affordable flight options available from Illinois to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This United Airlines deal was found by Cheapflights users on 12/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:16 pmORD - YYZ
Nonstop2h 05mUnited Airlines
Thu 1/19:00 amYYZ - ORD
Nonstop2h 05mUnited Airlines
Deal found 12/12$282
This Air Canada deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:30 pmORD - YUL
1 stop4h 23mAir Canada
Tue 1/611:10 amYUL - ORD
1 stop5h 00mAir Canada
Deal found 12/13$302
This United Airlines deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/293:55 pmORD - YYZ
Nonstop1h 39mUnited Airlines
Sat 1/35:30 pmYYZ - ORD
Nonstop2h 20mUnited Airlines
Deal found 12/13$318
This FlightHub deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:15 pmMDW - YUL
1 stop5h 30mPorter Airlines
Mon 1/511:25 amYUL - MDW
1 stop4h 55mPorter Airlines
Deal found 12/15$334
This Trip.com deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:00 amMDW - YUL
1 stop4h 30mPorter Airlines
Fri 1/26:45 amYUL - MDW
1 stop4h 25mPorter Airlines
Deal found 12/13$335
This Kissandfly.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Tue 1/69:15 amYTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 12/15$335
This deal was found by Cheapflights users on 12/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Mon 12/229:15 amYTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 12/12$350
This Mytrip deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2911:00 amMDW - YUL
1 stop5h 45mPorter Airlines
Mon 2/26:45 amYUL - MDW
1 stop4h 25mPorter Airlines
Deal found 12/15$351
This deal was found by Cheapflights users on 12/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2111:00 amMDW - YTZ
Nonstop1h 42mPorter Airlines
Mon 12/229:15 amYTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 12/12$353
This Trip.com deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/294:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Mon 1/52:30 pmYTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 12/13$354
This deal was found by Cheapflights users on 12/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/204:15 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Tue 12/232:30 pmYTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 12/12$357
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/175:00 amORD - YYZ
1 stop17h 20mMultiple Airlines
Thu 1/87:35 amYYZ - ORD
1 stop27h 08mMultiple Airlines
Deal found 12/15$358

Find flight deals from Illinois to Ontario

Keep the following information in mind while searching for Illinois to Ontario flight deals. Data was last updated December 15, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$184
(SmartFares)

One-way from

$58
(Mytrip)

Popular in

January

Cheapest in

September

Average price

$301

Good round-trip deal

$243 or less

Good one-way deal

$126 or less
Provider with most accurate pricing for Chicago (CHI)-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Toronto (YTO) flights.
Search Deals
From Illinois to Ontario
Search Deals
One-way flight from Illinois to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Ontario.
Search Deals
Price to beat on a one-way flight from Illinois to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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 2,558,603 searches. Data last updated December 15, 2025.
Use the filters below to find and compare flights from Illinois to Ontario that are best for you.

Fly from

Illinois

Fly to

Ontario

Route

Depart

Return

Price

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Tue 1/20

11:05 am-1:47 pm

Nonstop1h 42m

Toronto Island

Tue 1/27

9:20 am-10:10 am

Nonstop1h 50m

$194

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 2/19

6:40 am-5:28 pm

1 stop9h 48m

Toronto Pearson Intl

Sun 2/22

4:43 pm-5:43 pm

Nonstop2h 00m

$195

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 1/30

11:05 am-1:47 pm

Nonstop1h 42m

Toronto Island

Sat 1/31

11:00 am-11:50 am

Nonstop1h 50m

$199

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 2/5

1:13 pm-4:02 pm

Nonstop1h 49m

Toronto Pearson Intl

Mon 2/9

11:00 am-12:08 pm

Nonstop2h 08m

$208

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Mon 1/26

4:50 pm-7:45 pm

Nonstop1h 55m

Toronto Pearson Intl

Mon 2/2

3:30 pm-4:40 pm

Nonstop2h 10m

$211

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 1/30

7:10 am-9:58 am

Nonstop1h 48m

Toronto Pearson Intl

Mon 2/2

3:30 pm-4:40 pm

Nonstop2h 10m

$211

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Thu 2/19

8:51 pm-12:23 pm

1 stop14h 32m

Montreal Pierre Elliott Trudeau Intl

Tue 2/24

12:58 pm-10:11 am

1 stop22h 13m

$213

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sun 2/8

11:00 am-1:42 pm

Nonstop1h 42m

Toronto Island

Sat 2/14

11:00 am-11:50 am

Nonstop1h 50m

$214

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Thu 1/29

7:15 am-6:13 pm

2 stops9h 58m

Toronto Island

Thu 2/5

10:45 am-2:55 pm

1 stop5h 10m

$218

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 2/12

6:20 pm-11:46 pm

1 stop4h 26m

Toronto Pearson Intl

Mon 2/16

8:45 am-9:50 am

Nonstop2h 05m

$220

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

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

Have a flexible travel schedule? Discover the best time to fly to Ontario from Illinois 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 Illinois to Ontario

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

Currently, March is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of $79). Flying from Illinois to Region of Ontario in December is currently the most expensive (average of $211). 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 IL to ON?

Find hourly flight availability from Illinois 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 December 15, 2025.

It’s optimal to fly from Illinois to Region of Ontario in the evening. By choosing this option you can save up to 30% on the cost of your flight, compared to a flight at noon.

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

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

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

Weekly flight availability from Illinois to Region of Ontario

Explore weekly flight availability from Illinois 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 December 15, 2025.

The most flights from USIL to CAON are scheduled on a Monday (64 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (19 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 December 15, 2025.
Read through reviews of airlines operating flights from Illinois to Ontario, such as Porter Airlines, Air Transat, and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
399 reviews

Entertainment

7.0

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

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
8.0
Very good
399 reviews
Porter Airlines
8.0
Very good
399 reviews

Entertainment

7.0

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

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 Transat
7.8
Good
482 reviews
Porter Airlines
8.0
Very good
399 reviews

Entertainment

7.0

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

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
9,092 reviews
Porter Airlines
8.0
Very good
399 reviews

Entertainment

7.0

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

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
American Airlines
7.2
Good
11,051 reviews
Porter Airlines
8.0
Very good
399 reviews

Entertainment

7.0

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

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
10,525 reviews
Porter Airlines
8.0
Very good
399 reviews

Entertainment

7.0

Food

7.6

Crew

8.6

Overall

8.0

Boarding

8.2

Comfort

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 Illinois 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 Illinois to Region of Ontario?

    There are many flights that can get you from Illinois to Region of Ontario in 1h 42m. Fly via Porter Airlines, American Airlines, or United Airlines to get the fastest option. Airlines will cover a distance of 442 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $54 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Porter Airlines and United Airlines, with prices starting from $58 and $64, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois 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 Illinois to Region of Ontario?

    Currently, March is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of $79). Flying from Illinois to Region of Ontario in December is currently the most expensive (average of $211). 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 Illinois to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Illinois to Ontario

Discover the top 4 airlines that operate flights from Illinois 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 2,558,603 searches. Data last updated December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$116Average$287FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$146Average$421FlexibilityNo cancel feeOn-time69%
Porter AirlinesCheapest$185Average$356FlexibilityNo cancel feeOn-time52%
American AirlinesCheapest$215Average$378FlexibilityNo cancel feeOn-time71%

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