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Cheap flights from Ontario to Illinois from C$ 182

YYZ — ORD
13 Oct — 20 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Illinois

Tue 6/1012:25 p.m. -
Nonstop1h 58m
Sat 10/109:55 a.m. -
Nonstop1h 45m
Deal found 12/9C$ 275
Fri 25/911:00 a.m. -
Nonstop2h 00m
Sun 27/99:55 a.m. -
Nonstop1h 45m
Deal found 11/9C$ 284
Sat 3/101:45 p.m. -
Nonstop1h 50m
Mon 5/103:20 p.m. -
Nonstop1h 40m
Deal found 11/9C$ 284
Sat 14/119:45 a.m. -
1 stop6h 07m
Wed 18/111:55 p.m. -
Nonstop1h 47m
Deal found 12/9C$ 284
Sat 10/106:50 p.m. -
Nonstop1h 58m
Sat 17/103:45 p.m. -
Nonstop1h 46m
Deal found 10/9C$ 286
Fri 2/101:45 p.m. -
Nonstop1h 50m
Sun 4/103:20 p.m. -
Nonstop1h 40m
Deal found 9/9C$ 286
Thu 24/910:45 a.m. -
1 stop5h 07m
Thu 1/102:00 p.m. -
Nonstop1h 48m
Deal found 10/9C$ 286
Thu 24/911:00 a.m. -
Nonstop2h 00m
Sun 27/97:09 a.m. -
Nonstop1h 45m
Deal found 9/9C$ 287
Fri 25/91:45 p.m. -
Nonstop1h 50m
Fri 2/103:20 p.m. -
Nonstop1h 40m
Deal found 8/9C$ 287
Thu 24/97:35 p.m. -
Nonstop2h 06m
Sun 27/97:25 a.m. -
Nonstop1h 42m
Deal found 10/9C$ 287
Sat 26/96:50 p.m. -
Nonstop1h 58m
Mon 28/93:40 p.m. -
1 stop6h 38m
Deal found 10/9C$ 289
Wed 23/91:45 p.m. -
Nonstop1h 50m
Mon 28/911:45 a.m. -
Nonstop1h 40m
Deal found 9/9C$ 289

Find flight deals from Ontario to Illinois

Round-trip from

C$ 275

One-way from

C$ 182

Popular in

October

Cheapest in

February

Average price

C$ 388

Good round-trip deal

C$ 327 or less

Good one-way deal

C$ 190 or less
Air Canada
  • Air Canada
  • 6/10-10/10
  • Nonstop
  • 3h 43m total
  • Ontario to Illinois
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Air Canada
  • Air Canada
  • 29/10-31/12
  • 1 total stop
  • 5h 07m total
  • Ontario to Illinois
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Highest demand for flights based on searches. 3% potential increase in price (C$ 16 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease (C$ 5 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Ontario to Illinois.
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Price to beat on a one-way flight from Ontario to Illinois.
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Ontario to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

TorontoChicago

YTZ Toronto Island - MDW Chicago Midway

YTZMDW

Toronto Island

Thu 1/10

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

Nonstop1h 50m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 182

TorontoChicago

YTZ Toronto Island - MDW Chicago Midway

YTZMDW

Toronto Island

Tue 20/10

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

Nonstop1h 50m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 183

TorontoChicago

YTZ Toronto Island - MDW Chicago Midway

YTZMDW

Toronto Island

Wed 23/9

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

Nonstop1h 50m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 183

TorontoChicago

YTZ Toronto Island - MDW Chicago Midway

YTZMDW

Toronto Island

Mon 5/10

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

Nonstop1h 50m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 183

TorontoChicago

YTZ Toronto Island - MDW Chicago Midway

YTZMDW

Toronto Island

Tue 29/9

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

Nonstop1h 50m

Chicago Midway

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 184

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Tue 6/10

12:15 p.m.-1:25 p.m.

Nonstop2h 10m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 193

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Wed 7/10

12:15 p.m.-1:25 p.m.

Nonstop2h 10m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 193

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Thu 8/10

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

Nonstop2h 00m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 198

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Sun 13/12

8:35 a.m.-9:44 a.m.

Nonstop2h 09m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 200

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Fri 25/9

7:43 p.m.-11:32 p.m.

1 stop4h 49m

Chicago O'Hare Intl

Wed 31/12

12:00 a.m.-1:00 a.m.

Nonstop0h 00m

C$ 201

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Ontario with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Ontario to Illinois

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

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Illinois (average of C$ 354). Flying from Region of Ontario to Illinois in December is currently the most expensive (average of C$ 454). 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 ON to IL?

A simple way to save on the total cost of your ticket is to fly from Region of Ontario to Illinois at noon. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight in the afternoon.

Weekly flight availability from Region of Ontario to Illinois

The most flights from CAON to USIL are scheduled on a Friday (69 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (52 on average).

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

Airfare is below average for this route at the moment.
Region of Ontario to Illinois flights typically cost between C$ 325 and C$ 642 in October.
The cheapest round-trip price found within the last 5 days was C$ 275 on Air Canada (6 Oct-10 Oct).

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

The best time to book flights from Region of Ontario to Illinois is 87 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 Region of Ontario to Illinois?

Travelers seeking maximum savings on their Region of Ontario to Illinois flight should consider departing on Wednesday afternoons 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.

Reviews of airlines servicing Illinois

Read reviews from past customers who have flown Porter Airlines,United Airlines, andWestJet from Ontario to Illinois. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
460 reviews
Check prices

Crew

8.6

Entertainment

6.9

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Porter Airlines
8.0
Very good
460 reviews
Porter Airlines
8.0
Very good
460 reviews
Check prices

Crew

8.6

Entertainment

6.9

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
United Airlines
7.4
Good
10,214 reviews
Porter Airlines
8.0
Very good
460 reviews
Check prices

Crew

8.6

Entertainment

6.9

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
WestJet
7.2
Good
3,444 reviews
Porter Airlines
8.0
Very good
460 reviews
Check prices

Crew

8.6

Entertainment

6.9

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
American Airlines
7.1
Good
12,050 reviews
Porter Airlines
8.0
Very good
460 reviews
Check prices

Crew

8.6

Entertainment

6.9

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Air Canada
7.1
Good
11,620 reviews
Porter Airlines
8.0
Very good
460 reviews
Check prices

Crew

8.6

Entertainment

6.9

Boarding

8.2

Food

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.

Related info for your journey

  • How long is the flight from Region of Ontario to Illinois?

    United Airlines, Porter Airlines, and Delta can get you from Region of Ontario to Illinois in just under 1h 50m. Your travel time can differ by up to 5h. The distance between Region of Ontario and Illinois is about 711 km. This flight may include one or multiple stops.

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

    For one-way options, check prices for Porter Airlines. According to our data, you can fly for as low as C$ 134. Users have also found prices from C$ 156 and C$ 163 on United Airlines and Air Transat, respectively.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Illinois (average of C$ 354). Flying from Region of Ontario to Illinois in December is currently the most expensive (average of C$ 454). 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

Alternative routes for Ontario to Illinois

Toronto Island to Newark flights
Pearson Intl to Newark flights
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Hamilton to Newark flights
Pearson Intl to Reagan-National flights
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Pearson Intl to O'Hare Intl flights
Toronto Island to Orlando flights
Pearson Intl to Seattle flights
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Pearson Intl to Dulles Intl flights
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Pearson Intl to Hobby flights
Toronto Island to O'Hare Intl flights
Calgary to Las Vegas flights
Toronto Island to Boston flights
Vancouver Intl to Honolulu flights
Pearson Intl to George Bush Intcntl flights
Ottawa to Fort Lauderdale flights
Vancouver Intl to O'Hare Intl flights
Pearson Intl to Sky Harbor Intl flights
Abbotsford to Los Angeles flights
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Pearson Intl to Tampa flights
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Vancouver Intl to LaGuardia flights
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Top 5 airlines flying from Ontario to Illinois

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 134AverageC$ 611FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 220AverageC$ 425FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
American AirlinesCheapestC$ 261AverageC$ 429FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 286AverageC$ 594FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 352AverageC$ 423FlexibilityNo cancel feeOn-time60%
Search WestJet flights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Illinois. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

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 Ontario to Illinois.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Illinois flexibly with Cheapflights today.

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

Yes, Cheapflights offers price alerts on Ontario to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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