Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Illinois to Ontario from C$ 97

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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
6 sie — 13 sie1
1 adult

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 1 sierpnia 2025.

Round-trip from

C$ 239

One-way from

C$ 97

Popular in

November

Cheapest in

August

Average price

C$ 358

Good round-trip deal

C$ 115 or less

Good one-way deal

C$ 115 or less
United Airlines
  • United Airlines
  • 3/9-3/9
  • 1 total stop
  • 6h 26m total
  • Illinois to Ontario
Search Deals
Air Canada
  • Air Canada
  • 8/10
  • Nonstop
  • 1h 42m total
  • Illinois to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 44 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 August 2025
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

Find flight deals from Illinois to Ontario

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 1 sierpnia 2025.

śr. 3/98:50 a.m.ORD - YYZ
1 stop4h 29mUnited Airlines
śr. 3/95:15 p.m.YYZ - ORD
Nonstop1h 57mUnited Airlines
Deal found 30/7C$ 239
śr. 20/89:40 a.m.MDW - YTZ
Nonstop1h 40mPorter Airlines
pt. 12/93:35 p.m.YTZ - MDW
Nonstop1h 49mPorter Airlines
Deal found 29/7C$ 241
sob. 13/912:00 p.m.ORD - YYZ
Nonstop1h 38mAir Canada
sob. 20/92:10 p.m.YYZ - ORD
Nonstop1h 54mAir Canada
Deal found 30/7C$ 241
śr. 8/109:35 a.m.MDW - YTZ
Nonstop1h 42mAir Transat
pon. 13/103:35 p.m.YTZ - MDW
Nonstop1h 49mAir Transat
Deal found 31/7C$ 255
śr. 3/96:10 a.m.ORD - YYZ
1 stop4h 49mAmerican Airlines
śr. 3/93:45 p.m.YYZ - ORD
1 stop5h 42mAmerican Airlines
Deal found 30/7C$ 262
sob. 20/912:33 p.m.ORD - YUL
1 stop8h 59mMultiple Airlines
pon. 22/98:20 a.m.YUL - ORD
Nonstop2h 31mMultiple Airlines
Deal found 30/7C$ 275
sob. 13/96:44 p.m.ORD - YYZ
1 stop18h 21mMultiple Airlines
sob. 20/92:10 p.m.YYZ - ORD
Nonstop1h 54mMultiple Airlines
Deal found 30/7C$ 280
ndz. 14/910:40 a.m.ORD - YUL
Nonstop2h 14mAir Canada
śr. 24/96:40 p.m.YUL - ORD
Nonstop2h 31mAir Canada
Deal found 30/7C$ 281
czw. 28/89:40 a.m.MDW - YTZ
Nonstop1h 40mMultiple Airlines
czw. 4/97:50 a.m.YTZ - MDW
Nonstop1h 49mMultiple Airlines
Deal found 29/7C$ 284
sob. 13/98:40 a.m.ORD - YTZ
1 stop7h 05mAir Canada
sob. 20/98:25 a.m.YTZ - ORD
1 stop7h 30mAir Canada
Deal found 30/7C$ 286
wt. 2/95:00 a.m.ORD - YUL
1 stop9h 20mAmerican Airlines
czw. 4/912:30 p.m.YUL - ORD
Nonstop2h 35mAmerican Airlines
Deal found 30/7C$ 295
pon. 22/99:35 a.m.MDW - YUL
1 stop5h 25mPorter Airlines
czw. 25/91:10 p.m.YUL - MDW
1 stop4h 14mPorter Airlines
Deal found 29/7C$ 304

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 1 sierpnia 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

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

śr. 3/9

8:50 a.m.-2:19 p.m.

1 stop4h 29m

Toronto Pearson Intl

śr. 3/9

5:15 p.m.-6:12 p.m.

Nonstop1h 57m

C$ 239

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

śr. 20/8

9:40 a.m.-12:20 p.m.

Nonstop1h 40m

Toronto Island

pt. 12/9

3:35 p.m.-4:24 p.m.

Nonstop1h 49m

C$ 241

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

sob. 13/9

12:00 p.m.-2:38 p.m.

Nonstop1h 38m

Toronto Pearson Intl

sob. 20/9

2:10 p.m.-3:04 p.m.

Nonstop1h 54m

C$ 241

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

śr. 8/10

9:35 a.m.-12:17 p.m.

Nonstop1h 42m

Toronto Island

pon. 13/10

3:35 p.m.-4:24 p.m.

Nonstop1h 49m

C$ 255

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

śr. 3/9

6:10 a.m.-11:59 a.m.

1 stop4h 49m

Toronto Pearson Intl

śr. 3/9

3:45 p.m.-8:27 p.m.

1 stop5h 42m

C$ 262

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

sob. 20/9

12:33 p.m.-10:32 p.m.

1 stop8h 59m

Montreal Pierre Elliott Trudeau Intl

pon. 22/9

8:20 a.m.-9:51 a.m.

Nonstop2h 31m

C$ 275

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

sob. 13/9

6:44 p.m.-2:05 p.m.

1 stop18h 21m

Toronto Pearson Intl

sob. 20/9

2:10 p.m.-3:04 p.m.

Nonstop1h 54m

C$ 280

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

ndz. 14/9

10:40 a.m.-1:54 p.m.

Nonstop2h 14m

Montreal Pierre Elliott Trudeau Intl

śr. 24/9

6:40 p.m.-8:11 p.m.

Nonstop2h 31m

C$ 281

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

czw. 28/8

9:40 a.m.-12:20 p.m.

Nonstop1h 40m

Toronto Island

czw. 4/9

7:50 a.m.-8:39 a.m.

Nonstop1h 49m

C$ 284

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

sob. 13/9

8:40 a.m.-4:45 p.m.

1 stop7h 05m

Toronto Island

sob. 20/9

8:25 a.m.-2:55 p.m.

1 stop7h 30m

C$ 286

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/7

Showing 1-10 of 60 results
1
2
3
...
6

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, January is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of C$ 167). Flying from Illinois to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 1 sierpnia 2025.

When flying from Illinois to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 1 sierpnia 2025.

The most flights from USIL to CAON are scheduled on a Thursday (62 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (42 on average).

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 1 sierpnia 2025.
Check out reviews from past customers who have flown with Porter Airlines,Delta, andAir Transat 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
318 reviews
Check prices

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
318 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Delta
8.0
Very good
7,981 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Transat
7.7
Good
424 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,900 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
318 reviews
Check prices

Entertainment

7.0

Comfort

8.0

Boarding

8.2

Food

7.6

Overall

8.0

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

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.

  • 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$ 97 on Air Canada. Other airlines that offer cheap prices include United Airlines from C$ 102 and American Airlines from C$ 104 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, January is the cheapest month in which you can book a flight from Illinois to Region of Ontario (average of C$ 167). Flying from Illinois to Region of Ontario in July is currently the most expensive (average of C$ 258). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Toronto Island flights
Newark to Pearson Intl flights
John F Kennedy Intl to Pearson Intl flights
San Francisco to Vancouver Intl flights
Newark to Pierre Elliott Trudeau Intl flights
LaGuardia to Pearson Intl flights
John F Kennedy Intl to Vancouver Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
Los Angeles to Vancouver Intl flights
Boston to Pearson Intl flights
Newark to Vancouver Intl flights
O'Hare Intl to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Newark to Calgary flights
Los Angeles to Pearson Intl flights
Dulles Intl to Pearson Intl flights
Boston to Toronto Island flights
San Francisco to Pearson Intl flights
John F Kennedy Intl to Calgary flights
Reagan-National to Pearson Intl flights
Dallas/Fort Worth to Pearson Intl flights
Denver to Vancouver Intl flights
San Francisco to Calgary flights
Hobby to Pearson Intl flights
Dulles Intl to Toronto Island flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Fort Lauderdale to Pearson Intl flights
Seattle to Pearson Intl flights
Atlanta to Pearson Intl flights
Los Angeles to Calgary flights
O'Hare Intl to Vancouver Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
San Diego to Vancouver Intl flights
George Bush Intcntl to Pearson Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
LaGuardia to Vancouver Intl flights
San Francisco to Abbotsford flights
Dulles Intl to Vancouver Intl flights
Midway to Toronto Island flights
LaGuardia to Calgary flights
Hobby to Vancouver Intl flights
Santa Ana to Vancouver Intl flights
O'Hare Intl to Calgary flights
Boston to Pierre Elliott Trudeau Intl flights
Ontario to Vancouver Intl flights
Newark to Québec City flights
Baltimore to Pearson Intl flights
Boston to Vancouver Intl flights

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 1 sierpnia 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 204AverageC$ 419FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 261AverageC$ 374FlexibilityNo 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.

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.