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Cheap flights from Illinois to Ontario from C$ 125

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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
16 Apr — 23 Apr1
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 17 March 2026.

Thu 30/411:00 a.m.
MDW
-
YUL
1 stop4h 30m
Porter Airlines
Thu 7/56:30 a.m.
YUL
-
MDW
1 stop4h 10m
Porter Airlines
Deal found 16/3C$ 279
Thu 16/411:00 a.m.
MDW
-
YTZ
Nonstop1h 42m
Porter Airlines
Sun 19/42:30 p.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 16/3C$ 279
Fri 17/44:05 p.m.
MDW
-
YUL
1 stop5h 40m
Porter Airlines
Sun 19/410:55 a.m.
YUL
-
MDW
1 stop5h 25m
Porter Airlines
Deal found 16/3C$ 281
Thu 7/58:45 a.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Sun 10/58:40 a.m.
YUL
-
ORD
Nonstop2h 38m
Air Canada
Deal found 12/3C$ 281
Thu 16/412:50 p.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Sun 19/49:15 a.m.
YUL
-
ORD
Nonstop2h 38m
Air Canada
Deal found 13/3C$ 283
Fri 1/58:45 a.m.
ORD
-
YUL
Nonstop2h 11m
Air Canada
Wed 6/51:15 p.m.
YUL
-
ORD
Nonstop2h 38m
Air Canada
Deal found 17/3C$ 285
Thu 9/48:40 a.m.
ORD
-
YUL
Nonstop2h 11m
Air Canada
Sun 12/48:00 a.m.
YUL
-
ORD
1 stop6h 05m
Air Canada
Deal found 17/3C$ 288
Wed 17/63:20 p.m.
MDW
-
YTZ
Nonstop1h 40m
Porter Airlines
Sun 21/61:45 p.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 16/3C$ 289
Sat 25/43:45 p.m.
ORD
-
YUL
Nonstop2h 11m
Air Canada
Mon 27/49:15 a.m.
YUL
-
ORD
Nonstop2h 38m
Air Canada
Deal found 13/3C$ 290
Mon 11/510:25 a.m.
MDW
-
YUL
1 stop5h 50m
Porter Airlines
Mon 18/56:30 a.m.
YUL
-
MDW
1 stop4h 10m
Porter Airlines
Deal found 16/3C$ 296
Wed 3/63:20 p.m.
MDW
-
YTZ
Nonstop1h 40m
Porter Airlines
Mon 15/61:45 p.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 16/3C$ 296
Thu 30/411:00 a.m.
MDW
-
YTZ
Nonstop1h 42m
Porter Airlines
Thu 7/58:50 a.m.
YTZ
-
MDW
Nonstop1h 50m
Porter Airlines
Deal found 16/3C$ 297

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 17 March 2026.

Round-trip from

C$ 279

One-way from

C$ 125

Popular in

December

Cheapest in

September

Average price

C$ 357

Good round-trip deal

C$ 367 or less

Good one-way deal

C$ 148 or less
Porter Airlines
  • Porter Airlines
  • 30/4-7/5
  • 2 total stops
  • 8h 40m total
  • Illinois to Ontario
Search Deals
Porter Airlines
  • Porter Airlines
  • 7/4
  • Nonstop
  • 1h 42m total
  • Illinois to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 32 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 March 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 17 March 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

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Tue 28/4

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

Nonstop1h 42m

Toronto Island

Wed 29/4

9:25 a.m.-10:15 a.m.

Nonstop1h 50m

C$ 318

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 30/4

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

Nonstop1h 42m

Toronto Island

Thu 7/5

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

Nonstop1h 50m

C$ 329
Quickest round-trip

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 1/5

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

Nonstop1h 40m

Toronto Island

Tue 5/5

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

Nonstop1h 50m

C$ 330

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Tue 31/3

9:30 a.m.-6:55 p.m.

1 stop8h 25m

Toronto Island

Sun 5/4

9:25 a.m.-10:15 a.m.

Nonstop1h 50m

C$ 331

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 29/4

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

Nonstop1h 42m

Toronto Island

Wed 6/5

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

Nonstop1h 50m

C$ 344

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Mon 25/5

6:23 a.m.-5:42 p.m.

1 stop10h 19m

Montreal Pierre Elliott Trudeau Intl

Thu 28/5

6:00 a.m.-12:42 p.m.

1 stop7h 42m

C$ 357

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Sun 12/4

7:10 a.m.-3:53 p.m.

1 stop7h 43m

Montreal Pierre Elliott Trudeau Intl

Sun 19/4

6:00 a.m.-12:45 p.m.

1 stop7h 45m

C$ 357

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 10/4

4:05 p.m.-6:47 p.m.

Nonstop1h 42m

Toronto Island

Tue 14/4

9:25 a.m.-10:15 a.m.

Nonstop1h 50m

C$ 360

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Wed 9/9

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

Nonstop1h 40m

Toronto Island

Thu 10/9

10:05 a.m.-11:00 a.m.

Nonstop1h 55m

C$ 366

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Wed 9/9

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

Nonstop1h 40m

Toronto Island

Sat 12/9

10:05 a.m.-11:00 a.m.

Nonstop1h 55m

C$ 366

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

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, March is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of C$ 107). Flying from Illinois to Region of Ontario in February is currently the most expensive (average of C$ 259). 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 17 March 2026.

It’s optimal to fly from Illinois to Region of Ontario in the evening. By choosing this option you can save up to 58% 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 14 March 2026.

Travelers seeking maximum savings on their Illinois to Region of Ontario flight should consider departing on Thursday afternoons 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 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 17 March 2026.

The most flights from USIL to CAON are scheduled on a Monday (64 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (50 on average).

How much does it cost to fly round-trip from Illinois 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 17 March 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
424 reviews
Check prices

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
424 reviews
Porter Airlines
8.0
Very good
424 reviews
Check prices

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,431 reviews
Porter Airlines
8.0
Very good
424 reviews
Check prices

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
10,811 reviews
Porter Airlines
8.0
Very good
424 reviews
Check prices

Entertainment

7.0

Comfort

8.0

Food

7.6

Overall

8.0

Crew

8.6

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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 41m. Airlines will cover a distance of 716 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$ 87 on Porter Airlines. Other airlines that offer cheap prices include United Airlines from C$ 95 and American Airlines from C$ 111 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$ 107). Flying from Illinois to Region of Ontario in February is currently the most expensive (average of C$ 259). 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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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 17 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 201AverageC$ 352FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 241AverageC$ 337FlexibilityNo 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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