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Cheap flights from Illinois 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.
ORD — YYZ
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Ontario

Keep the following information in mind while searching for Illinois to Ontario flight deals. Data was last updated 30 October 2025.

Round-trip from

C$ 263

One-way from

C$ 116

Popular in

January

Cheapest in

September

Average price

C$ 418

Good round-trip deal

C$ 397 or less

Good one-way deal

C$ 141 or less
Porter Airlines
  • Porter Airlines
  • 19/11-22/11
  • Nonstop
  • 3h 32m total
  • Illinois to Ontario
Search Deals
Porter Airlines
  • Porter Airlines
  • 12/12
  • Nonstop
  • 1h 42m total
  • Illinois 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$ 10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Illinois to Ontario.
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Price to beat on a one-way flight from Illinois to Ontario.
Search Deals

Find flight deals from Illinois to Ontario

Enter your travel dates to find the best prices.

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 30 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
Fri 5/124:15 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sun 7/129:15 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 29/10C$ 267
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
Thu 13/1111:00 a.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sun 16/119:15 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 30/10C$ 271
Thu 20/117:11 a.m.ORD - YYZ
1 stop7h 46mAmerican Airlines
Sat 22/114:44 p.m.YYZ - ORD
Nonstop2h 00mAmerican Airlines
Deal found 29/10C$ 271
Sun 16/1111:00 a.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Thu 20/112:30 p.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 30/10C$ 276
Fri 5/129:39 a.m.ORD - YYZ
Nonstop1h 51mAmerican Airlines
Mon 8/124:13 p.m.YYZ - ORD
1 stop7h 41mAmerican Airlines
Deal found 28/10C$ 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$ 283
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
Wed 26/118:00 a.m.ORD - YYZ
Nonstop1h 40mAir Canada
Fri 28/112:15 p.m.YYZ - ORD
Nonstop1h 55mAir Canada
Deal found 29/10C$ 290
Thu 20/117:35 a.m.ORD - YYZ
1 stop4h 27mAmerican Airlines
Mon 24/114:30 p.m.YYZ - ORD
1 stop8h 07mAmerican Airlines
Deal found 28/10C$ 292

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 629,999 searches. Data last updated 30 October 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

Wed 12/11

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

Nonstop1h 42m

Toronto Island

Mon 17/11

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

Nonstop1h 50m

C$ 265

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

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

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

Sun 15/3

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

Nonstop1h 42m

Toronto Island

Thu 19/3

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

Nonstop1h 50m

C$ 271

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

Thu 15/1

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

Nonstop1h 42m

Toronto Island

Tue 20/1

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

Nonstop1h 50m

C$ 278

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 15/1

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

Nonstop1h 42m

Toronto Island

Fri 16/1

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

Nonstop1h 50m

C$ 278

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 17/12

4:50 p.m.-7:45 p.m.

Nonstop1h 55m

Toronto Pearson Intl

Sat 17/1

3:30 p.m.-4:40 p.m.

Nonstop2h 10m

C$ 293

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Mon 15/12

9:10 p.m.-11:59 p.m.

Nonstop1h 49m

Toronto Pearson Intl

Fri 16/1

9:00 p.m.-10:05 p.m.

Nonstop2h 05m

C$ 293

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 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 C$ 148). Flying from Illinois 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 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 30 October 2025.

It’s optimal to fly from Illinois to Region of Ontario in the evening. By choosing this option you can save up to 55% on the cost of your flight, compared to a flight in the morning.

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 16 December 2024.

Travelers seeking maximum savings on their Illinois 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.

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 30 October 2025.
Check out reviews from past customers who have flown with Porter Airlines,United Airlines, andAir Canada from Illinois to Ontario to help guide your decision. 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

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

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

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

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
8,996 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

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
10,383 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Entertainment

7.0

Food

7.6

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 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?

    Departing from Illinois to Region of Ontario will take you 1h 42m. Airlines will cover a distance of 711 km. This flight may include one or multiple stops.

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

    One-way options have recently been found by users for as low as C$ 116 on Porter Airlines. Other airlines that offer cheap prices include American Airlines from C$ 120 and Delta from C$ 124 one-way.

  • 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 C$ 148). Flying from Illinois 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

Browse thousands of different options on Cheapflights for your next trip

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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 2 airlines flying from Illinois to Ontario

Discover the top 2 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 629,999 searches. Data last updated 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 205AverageC$ 364FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 263AverageC$ 371FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario from Illinois today with Cheapflights!

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from Illinois.

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

Yes! Cheapflights helps users easily find flights from Illinois to Ontario with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ontario from Illinois today and book when prices fit your budget.

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