Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Illinois to Ontario from C$ 105

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 22/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
15 Oct — 22 Oct1
1 adult
1 adult, Economy

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 15 September 2025.

Round-trip from

C$ 275

One-way from

C$ 105

Popular in

November

Cheapest in

July

Average price

C$ 357

Good round-trip deal

C$ 221 or less

Good one-way deal

C$ 120 or less
22/10-27/10
  • 22/10-27/10
  • 2 total stops
  • 26h 06m total
  • Illinois to Ontario
Search Deals
22/10
  • 22/10
  • 1 total stop
  • 17h 22m total
  • Illinois to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 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 15 September 2025.

Wed 22/107:43 p.m.ORD - YYZ
1 stop17h 22mMultiple Airlines
Mon 27/104:00 p.m.YYZ - ORD
1 stop8h 44mMultiple Airlines
Deal found 14/9C$ 275
Thu 23/1012:53 p.m.ORD - YYZ
1 stop7h 14mMultiple Airlines
Mon 27/104:00 p.m.YYZ - ORD
1 stop8h 44mMultiple Airlines
Deal found 13/9C$ 284
Tue 7/105:05 a.m.ORD - YYZ
1 stop8h 00mMultiple Airlines
Mon 13/104:00 p.m.YYZ - ORD
1 stop8h 44mMultiple Airlines
Deal found 13/9C$ 293
Thu 16/101:26 p.m.ORD - YYZ
1 stop6h 41mMultiple Airlines
Mon 27/104:00 p.m.YYZ - ORD
1 stop8h 44mMultiple Airlines
Deal found 12/9C$ 298
Mon 6/107:43 p.m.ORD - YYZ
1 stop17h 22mMultiple Airlines
Mon 13/104:00 p.m.YYZ - ORD
1 stop8h 44mMultiple Airlines
Deal found 13/9C$ 302
Tue 7/105:05 a.m.ORD - YYZ
1 stop8h 00mMultiple Airlines
Mon 20/104:00 p.m.YYZ - ORD
1 stop8h 44mMultiple Airlines
Deal found 13/9C$ 306
Fri 17/107:20 p.m.ORD - YYZ
1 stop24h 47mMultiple Airlines
Mon 27/104:00 p.m.YYZ - ORD
1 stop8h 44mMultiple Airlines
Deal found 12/9C$ 309
Thu 23/1012:53 p.m.ORD - YYZ
1 stop7h 14mMultiple Airlines
Sun 26/104:00 p.m.YYZ - ORD
1 stop24h 49mMultiple Airlines
Deal found 14/9C$ 310
Tue 7/105:05 a.m.ORD - YYZ
1 stop8h 00mMultiple Airlines
Sun 19/104:00 p.m.YYZ - ORD
1 stop24h 49mMultiple Airlines
Deal found 13/9C$ 311
Sat 25/105:05 a.m.ORD - YYZ
1 stop8h 00mMultiple Airlines
Mon 27/104:00 p.m.YYZ - ORD
1 stop8h 44mMultiple Airlines
Deal found 14/9C$ 313
Thu 16/101:26 p.m.ORD - YYZ
1 stop6h 41mMultiple Airlines
Sun 26/104:00 p.m.YYZ - ORD
1 stop24h 49mMultiple Airlines
Deal found 12/9C$ 316
Fri 31/106:00 a.m.ORD - YYZ
1 stop13h 00mMultiple Airlines
Sun 2/114:00 p.m.YYZ - ORD
1 stop7h 49mMultiple Airlines
Deal found 13/9C$ 317

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 15 September 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

MDW - YTZ

MDWYTZ

Chicago Midway

Sun 12/10

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

Nonstop1h 42m

Toronto Island

Sun 19/10

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

Nonstop1h 49m

C$ 334

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 15/10

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

Nonstop1h 42m

Toronto Island

Sun 19/10

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

Nonstop1h 49m

C$ 347

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Thu 23/10

5:20 p.m.-10:15 p.m.

1 stop3h 55m

Montreal Pierre Elliott Trudeau Intl

Sun 26/10

11:25 a.m.-3:20 p.m.

1 stop4h 55m

C$ 364

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Fri 24/10

5:20 p.m.-10:15 p.m.

1 stop3h 55m

Montreal Pierre Elliott Trudeau Intl

Sun 26/10

11:25 a.m.-3:20 p.m.

1 stop4h 55m

C$ 365

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Thu 30/10

11:00 a.m.-4:30 p.m.

1 stop4h 30m

Montreal Pierre Elliott Trudeau Intl

Mon 3/11

6:45 a.m.-10:05 a.m.

1 stop4h 20m

C$ 367

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Fri 31/10

9:32 a.m.-8:00 p.m.

1 stop9h 28m

Toronto Pearson Intl

Sun 2/11

8:00 p.m.-8:32 a.m.

1 stop13h 32m

C$ 372

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Mon 20/10

5:20 p.m.-10:15 p.m.

1 stop3h 55m

Montreal Pierre Elliott Trudeau Intl

Thu 23/10

1:10 p.m.-4:24 p.m.

1 stop4h 14m

C$ 378

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 29/10

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

Nonstop1h 42m

Toronto Island

Wed 5/11

9:15 a.m.-10:05 a.m.

Nonstop1h 50m

C$ 378

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Wed 29/10

7:15 a.m.-2:55 p.m.

1 stop6h 40m

Toronto Island

Wed 5/11

10:30 a.m.-2:55 p.m.

1 stop5h 25m

C$ 400

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Sat 22/11

9:41 a.m.-4:02 p.m.

1 stop5h 21m

Toronto Pearson Intl

Sat 22/11

6:10 p.m.-9:52 a.m.

1 stop16h 42m

C$ 408

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

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$ 169). 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 15 September 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 15 September 2025.

The most flights from USIL to CAON are scheduled on a Friday (64 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (51 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 15 September 2025.
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
7.9
Good
363 reviews
Check prices

Comfort

7.9

Food

7.6

Overall

7.9

Entertainment

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
7.9
Good
363 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Comfort

7.9

Food

7.6

Overall

7.9

Entertainment

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,929 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Comfort

7.9

Food

7.6

Overall

7.9

Entertainment

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,000 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Comfort

7.9

Food

7.6

Overall

7.9

Entertainment

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

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 42m. 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$ 116 on Porter Airlines. Other airlines that offer cheap prices include WestJet from C$ 181 and United Airlines from C$ 183 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$ 169). 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 Pearson Intl flights
LaGuardia to Pearson Intl flights
Newark to Toronto Island flights
LaGuardia to Pierre Elliott Trudeau Intl flights
Newark to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Pearson Intl flights
Los Angeles to Pearson Intl flights
Los Angeles to Vancouver Intl flights
San Francisco to Vancouver Intl flights
John F Kennedy Intl to Vancouver Intl flights
Boston to Pearson Intl flights
Newark to Vancouver Intl flights
San Francisco to Pearson Intl flights
Dallas/Fort Worth to Pearson Intl flights
O'Hare Intl to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Dulles Intl to Pearson Intl flights
Reagan-National to Pearson Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Boston to Toronto Island flights
Seattle to Pearson Intl flights
Los Angeles to Calgary flights
LaGuardia to Vancouver Intl flights
O'Hare Intl to Vancouver Intl flights
Newark to Québec City flights
Hobby to Pearson Intl flights
Dulles Intl to Toronto Island flights
Boston to Pierre Elliott Trudeau Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
Fort Lauderdale to Pierre Elliott Trudeau Intl flights
San Diego to Vancouver Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Newark to Calgary flights
Denver to Vancouver Intl flights
Atlanta to Pearson Intl flights
Dallas/Fort Worth to Vancouver Intl flights
George Bush Intcntl to Pearson Intl flights
John F Kennedy Intl to Calgary flights
Philadelphia to Pearson Intl flights
Midway to Toronto Island flights
Fort Lauderdale to Pearson Intl flights
Santa Ana to Vancouver Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
George Bush Intcntl to Vancouver Intl flights
Hobby to Calgary flights
Hobby to Vancouver Intl flights
Minneapolis to Pearson Intl flights
Dulles Intl to Vancouver Intl flights
Ontario 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 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 204AverageC$ 411FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 261AverageC$ 365FlexibilityNo 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.