Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Ontario to Illinois from C$ 189

YYZ — ORD
30 Nov — 7 Dec1
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

Thu 19/114:35 p.m. -
Nonstop2h 05m
Mon 23/116:20 p.m. -
Nonstop1h 45m
Deal found 27/10C$ 297
Thu 19/114:35 p.m. -
Nonstop2h 05m
Sun 22/116:20 p.m. -
Nonstop1h 45m
Deal found 27/10C$ 299
Wed 25/1110:29 a.m. -
Nonstop2h 05m
Mon 30/1112:15 p.m. -
Nonstop1h 45m
Deal found 27/10C$ 300
Mon 23/114:35 p.m. -
Nonstop2h 05m
Thu 3/1212:15 p.m. -
Nonstop1h 45m
Deal found 27/10C$ 302
Mon 16/114:35 p.m. -
Nonstop2h 05m
Sun 22/116:20 p.m. -
Nonstop1h 45m
Deal found 26/10C$ 304
Fri 20/114:35 p.m. -
Nonstop2h 05m
Sun 22/116:20 p.m. -
Nonstop1h 45m
Deal found 26/10C$ 307
Fri 20/118:00 a.m. -
1 stop8h 00m
Tue 24/1110:15 a.m. -
Nonstop1h 37m
Deal found 26/10C$ 310
Thu 10/124:35 p.m. -
Nonstop2h 05m
Thu 17/126:20 p.m. -
Nonstop1h 45m
Deal found 26/10C$ 310
Fri 11/122:35 p.m. -
Nonstop2h 03m
Mon 14/1210:05 a.m. -
Nonstop1h 37m
Deal found 26/10C$ 311
Fri 20/114:35 p.m. -
Nonstop2h 05m
Tue 24/116:20 p.m. -
Nonstop1h 45m
Deal found 26/10C$ 311
Sun 22/1112:05 p.m. -
Nonstop2h 15m
Tue 24/111:55 p.m. -
Nonstop1h 47m
Deal found 27/10C$ 313
Mon 16/114:30 p.m. -
Nonstop2h 13m
Mon 16/118:40 p.m. -
Nonstop1h 43m
Deal found 26/10C$ 318

Find flight deals from Ontario to Illinois

Round-trip from

C$ 297

One-way from

C$ 189

Popular in

October

Cheapest in

February

Average price

C$ 441

Good round-trip deal

C$ 382 or less

Good one-way deal

C$ 186 or less
Porter Airlines
  • Porter Airlines
  • 19/11-23/11
  • Nonstop
  • 3h 50m total
  • Ontario to Illinois
Search Deals
Porter Airlines
  • Porter Airlines
  • 22/11-31/12
  • Nonstop
  • 2h 05m total
  • Ontario to Illinois
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 22 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 October 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Illinois.
Search Deals
Price to beat on a one-way flight from Ontario to Illinois.
Search Deals

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

TorontoChicago

YYZ Toronto Pearson Intl - MDW Chicago Midway

YYZMDW

Toronto Pearson Intl

Wed 25/11

6:00 a.m.-9:46 a.m.

1 stop4h 46m

Chicago Midway

Wed 31/12

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

Nonstop0h 00m

C$ 218

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Fri 4/12

12:15 p.m.-6:26 p.m.

1 stop7h 11m

Chicago O'Hare Intl

Wed 31/12

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

Nonstop0h 00m

C$ 223

TorontoChicago

YYZ Toronto Pearson Intl - MDW Chicago Midway

YYZMDW

Toronto Pearson Intl

Tue 24/11

6:00 a.m.-12:51 p.m.

1 stop7h 51m

Chicago Midway

Wed 31/12

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

Nonstop0h 00m

C$ 223

TorontoChicago

YYZ Toronto Pearson Intl - MDW Chicago Midway

YYZMDW

Toronto Pearson Intl

Thu 26/11

6:00 a.m.-11:25 a.m.

1 stop6h 25m

Chicago Midway

Wed 31/12

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

Nonstop0h 00m

C$ 223

TorontoChicago

YYZ Toronto Pearson Intl - MDW Chicago Midway

YYZMDW

Toronto Pearson Intl

Thu 3/12

6:00 a.m.-9:37 a.m.

1 stop4h 37m

Chicago Midway

Wed 31/12

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

Nonstop0h 00m

C$ 223
Quickest round-trip

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Thu 10/12

4:35 p.m.-5:40 p.m.

Nonstop2h 05m

Chicago O'Hare Intl

Wed 31/12

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

Nonstop0h 00m

C$ 229

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Fri 27/11

10:29 a.m.-11:34 a.m.

Nonstop2h 05m

Chicago O'Hare Intl

Wed 31/12

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

Nonstop0h 00m

C$ 243

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Wed 14/4

10:45 a.m.-2:48 p.m.

1 stop5h 03m

Chicago O'Hare Intl

Wed 31/12

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

Nonstop0h 00m

C$ 249

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Wed 25/11

10:29 a.m.-11:34 a.m.

Nonstop2h 05m

Chicago O'Hare Intl

Wed 31/12

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

Nonstop0h 00m

C$ 250

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Mon 28/12

4:35 p.m.-5:40 p.m.

Nonstop2h 05m

Chicago O'Hare Intl

Wed 31/12

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

Nonstop0h 00m

C$ 253

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/10

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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$ 377). Flying from Region of Ontario to Illinois in October is currently the most expensive (average of C$ 478). 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 23% on your trip compared to booking a flight in the afternoon.

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$ 341 and C$ 862 in November.
The cheapest round-trip price found within the last 5 days was C$ 310 on Air Canada (20 Nov-24 Nov).

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 Friday at noon when fares are most often at their lowest. Sunday 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,Air Transat, andUnited Airlines 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
467 reviews
Check prices

Crew

8.6

Boarding

8.2

Comfort

8.0

Entertainment

6.9

Food

7.6

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
467 reviews
Porter Airlines
8.0
Very good
467 reviews
Check prices

Crew

8.6

Boarding

8.2

Comfort

8.0

Entertainment

6.9

Food

7.6

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 Transat
7.7
Good
584 reviews
Porter Airlines
8.0
Very good
467 reviews
Check prices

Crew

8.6

Boarding

8.2

Comfort

8.0

Entertainment

6.9

Food

7.6

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
7.3
Good
10,461 reviews
Porter Airlines
8.0
Very good
467 reviews
Check prices

Crew

8.6

Boarding

8.2

Comfort

8.0

Entertainment

6.9

Food

7.6

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
11,835 reviews
Porter Airlines
8.0
Very good
467 reviews
Check prices

Crew

8.6

Boarding

8.2

Comfort

8.0

Entertainment

6.9

Food

7.6

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
7.0
Good
12,223 reviews
Porter Airlines
8.0
Very good
467 reviews
Check prices

Crew

8.6

Boarding

8.2

Comfort

8.0

Entertainment

6.9

Food

7.6

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?

    Delta, Porter Airlines, and United Airlines can get you from Region of Ontario to Illinois in just under 1h 55m. Your travel time can differ by up to 3h 19m. The distance between Region of Ontario and Illinois is about 716 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$ 152. Users have also found prices from C$ 157 and C$ 164 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$ 377). Flying from Region of Ontario to Illinois in October is currently the most expensive (average of C$ 478). 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
Pearson Intl to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pearson Intl to Fort Lauderdale flights
Pearson Intl to LaGuardia flights
Pierre Elliott Trudeau Intl to Newark flights
Vancouver Intl to Los Angeles flights
Pearson Intl to Miami flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Toronto Island to LaGuardia flights
Vancouver Intl to Las Vegas flights
Pierre Elliott Trudeau Intl to Miami flights
Vancouver Intl to John F Kennedy Intl flights
Vancouver Intl to Newark flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pearson Intl to Orlando flights
Pearson Intl to Dallas/Fort Worth flights
Pearson Intl to Las Vegas flights
Hamilton to Newark flights
Toronto Island to Fort Lauderdale flights
Toronto Island to John F Kennedy Intl flights
Pearson Intl to Hobby flights
Vancouver Intl to Honolulu flights
Pierre Elliott Trudeau Intl to Orlando flights
Pearson Intl to San Francisco flights
Pearson Intl to Los Angeles flights
Toronto Island to Orlando flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pearson Intl to Sky Harbor Intl flights
Pearson Intl to George Bush Intcntl flights
Pearson Intl to Tampa flights
Vancouver Intl to LaGuardia flights
Hamilton to Fort Lauderdale flights
Pearson Intl to O'Hare Intl flights
Toronto Island to Miami flights
Pearson Intl to Reagan-National flights
Abbotsford to Los Angeles flights
Vancouver Intl to Ontario flights
Ottawa to Fort Lauderdale flights
Pearson Intl to Boston flights
Vancouver Intl to Sky Harbor Intl flights
Pearson Intl to Seattle flights
Vancouver Intl to Dallas/Fort Worth flights
Toronto Island to Boston flights
Vancouver Intl to Palm Springs flights
Pearson Intl to Dulles Intl flights
Calgary to Las Vegas flights
Vancouver Intl to San Diego flights
Vancouver Intl to Kahului flights

Top 5 airlines flying from Ontario to Illinois

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 135AverageC$ 623FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Porter AirlinesCheapestC$ 249AverageC$ 429FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
American AirlinesCheapestC$ 263AverageC$ 472FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 299AverageC$ 420FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 386AverageC$ 495FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.