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Cheap flights from Illinois to Ontario from C$ 150

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 21/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
28 Aug — 4 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap 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 29 July 2026.

Wed 2/911:45 a.m.
MDW
-
YTZ
Nonstop1h 40m
Porter Airlines
Sat 5/91:45 p.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 28/7C$ 333
Wed 9/97:25 a.m.
ORD
-
YTZ
Nonstop1h 42m
Air Canada
Wed 16/99:30 a.m.
YTZ
-
ORD
1 stop6h 22m
Air Canada
Deal found 27/7C$ 333
Wed 9/911:45 a.m.
MDW
-
YTZ
Nonstop1h 40m
Porter Airlines
Wed 16/910:10 a.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 28/7C$ 334
Thu 10/98:40 p.m.
ORD
-
YYZ
Nonstop1h 46m
Air Canada
Sun 13/97:00 a.m.
YYZ
-
ORD
Nonstop2h 00m
Air Canada
Deal found 26/7C$ 334
Thu 3/93:20 p.m.
MDW
-
YTZ
Nonstop1h 40m
Porter Airlines
Tue 8/91:45 p.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 28/7C$ 336
Thu 10/98:45 a.m.
ORD
-
YTZ
1 stop6h 05m
Air Canada
Sun 13/97:35 p.m.
YTZ
-
ORD
Nonstop2h 06m
Air Canada
Deal found 26/7C$ 336
Sat 29/810:20 a.m.
MDW
-
YTZ
Nonstop1h 40m
Porter Airlines
Sat 5/91:45 p.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 25/7C$ 337
Tue 8/98:45 a.m.
ORD
-
YTZ
1 stop6h 05m
Air Canada
Tue 15/98:20 a.m.
YTZ
-
ORD
2 stops7h 32m
Air Canada
Deal found 24/7C$ 337
Mon 7/97:25 a.m.
ORD
-
YTZ
Nonstop1h 42m
Air Canada
Mon 14/912:15 p.m.
YTZ
-
ORD
Nonstop2h 06m
Air Canada
Deal found 24/7C$ 339
Wed 2/911:45 a.m.
MDW
-
YTZ
Nonstop1h 40m
Porter Airlines
Mon 7/910:10 a.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 28/7C$ 340
Tue 1/92:30 p.m.
ORD
-
YYZ
1 stop8h 24m
Lufthansa
Sat 5/911:00 a.m.
YYZ
-
ORD
Nonstop2h 00m
Lufthansa
Deal found 24/7C$ 340
Fri 21/810:25 a.m.
MDW
-
YTZ
Nonstop1h 40m
Porter Airlines
Wed 2/91:45 p.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 26/7C$ 341

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 29 July 2026.

Round-trip from

C$ 333

One-way from

C$ 150

Popular in

August

Cheapest in

March

Average price

C$ 428

Good round-trip deal

C$ 157 or less

Good one-way deal

C$ 238 or less
Porter Airlines
  • Porter Airlines
  • 2/9-5/9
  • Nonstop
  • 3h 30m total
  • Illinois to Ontario
Search Deals
Air Canada
  • Air Canada
  • 11/9
  • Nonstop
  • 1h 42m total
  • Illinois to Ontario
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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 629,999 searches. Data last updated 29 July 2026.
Use the filters below to find and compare flights from Illinois to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 3/9

3:20 p.m.-6:00 p.m.

Nonstop1h 40m

Toronto Island

Sun 6/9

1:45 p.m.-2:35 p.m.

Nonstop1h 50m

C$ 337

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 9/9

3:20 p.m.-6:00 p.m.

Nonstop1h 40m

Toronto Island

Sun 13/9

10:10 a.m.-11:00 a.m.

Nonstop1h 50m

C$ 346

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 9/9

11:45 a.m.-2:25 p.m.

Nonstop1h 40m

Toronto Island

Wed 16/9

10:10 a.m.-11:00 a.m.

Nonstop1h 50m

C$ 346

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sat 12/9

11:45 a.m.-2:25 p.m.

Nonstop1h 40m

Toronto Island

Sat 19/9

10:10 a.m.-11:00 a.m.

Nonstop1h 50m

C$ 346

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sat 29/8

10:20 a.m.-1:00 p.m.

Nonstop1h 40m

Toronto Island

Mon 31/8

1:45 p.m.-2:35 p.m.

Nonstop1h 50m

C$ 348

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 22/9

5:53 p.m.-8:44 p.m.

Nonstop1h 51m

Toronto Pearson Intl

Sat 26/9

7:00 a.m.-8:00 a.m.

Nonstop2h 00m

C$ 357

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 23/9

12:59 p.m.-3:46 p.m.

Nonstop1h 47m

Toronto Pearson Intl

Sun 27/9

8:50 a.m.-9:48 a.m.

Nonstop1h 58m

C$ 357

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 16/9

12:59 p.m.-3:46 p.m.

Nonstop1h 47m

Toronto Pearson Intl

Sat 19/9

8:50 a.m.-9:53 a.m.

Nonstop2h 03m

C$ 357

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Mon 24/8

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

Nonstop1h 40m

Toronto Island

Mon 31/8

1:45 p.m.-2:35 p.m.

Nonstop1h 50m

C$ 360

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 10/9

12:59 p.m.-3:46 p.m.

Nonstop1h 47m

Toronto Pearson Intl

Tue 15/9

9:00 a.m.-2:52 p.m.

1 stop6h 52m

C$ 370

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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, February is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of C$ 401). Flying from Illinois to Region of Ontario in August is currently the most expensive (average of C$ 502). 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 29 July 2026.

It’s optimal to fly from Illinois to Region of Ontario in the evening. By choosing this option you can save up to 56% on the cost of your flight, compared to a flight at noon.

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 29 July 2026.

The most flights from USIL to CAON are scheduled on a Monday (69 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (40 on average).

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

Airfare is below average for this route at the moment.
Illinois to Region of Ontario flights typically cost between C$ 450 and C$ 722 in September.
The cheapest round-trip price found within the last 5 days was C$ 334 on Air Canada (10 Sep-13 Sep).

How far ahead should I book a flight from Illinois to Region of Ontario?

The best time to book flights from Illinois to Region of Ontario is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 25 July 2026.

Travelers seeking maximum savings on their Illinois to Region of Ontario flight should consider departing on Thursday mornings when fares are most often at their lowest. Monday mornings 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 29 July 2026.
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
449 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Food

7.5

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Porter Airlines
8.0
Very good
449 reviews
Porter Airlines
8.0
Very good
449 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Food

7.5

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
United Airlines
7.4
Good
10,052 reviews
Porter Airlines
8.0
Very good
449 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Food

7.5

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats
Air Canada
7.1
Good
11,405 reviews
Porter Airlines
8.0
Very good
449 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Food

7.5

Entertainment

6.9

Reviews

1 / 20
6.0
Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

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 40m. 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$ 92 on Porter Airlines. Other airlines that offer cheap prices include American Airlines from C$ 114 and United Airlines from C$ 126 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, February is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of C$ 401). Flying from Illinois to Region of Ontario in August is currently the most expensive (average of C$ 502). 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 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 29 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 291AverageC$ 449FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 312AverageC$ 449FlexibilityNo 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 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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