Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Illinois to Ontario from C$ 146

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
22 Apr — 29 Apr1
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 17 April 2025.

Round-trip from

C$ 262

One-way from

C$ 146

Popular in

November

Cheapest in

July

Average price

C$ 464

Good round-trip deal

C$ 303 or less

Good one-way deal

C$ 129 or less
Porter Airlines
  • Porter Airlines
  • 8/5-11/5
  • Nonstop
  • 3h 31m total
  • Illinois to Ontario
Search Deals
Air Canada
  • Air Canada
  • 7/5
  • 1 total stop
  • 7h 10m total
  • Illinois to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 24 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 April 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 17 April 2025.

Thu 8/55:20 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sun 11/54:05 p.m.YTZ - MDW
Nonstop1h 49mPorter Airlines
Deal found 17/4C$ 262
Sun 1/68:25 p.m.ORD - YYZ
Nonstop1h 42mAir Canada
Sun 8/66:15 a.m.YYZ - ORD
1 stop4h 37mAir Canada
Deal found 17/4C$ 291
Sun 11/55:50 p.m.MDW - YTZ
Nonstop1h 42mMultiple Airlines
Wed 14/54:05 p.m.YTZ - MDW
Nonstop1h 49mMultiple Airlines
Deal found 16/4C$ 301
Tue 6/58:40 a.m.ORD - YTZ
1 stop5h 10mAir Canada
Tue 13/58:50 a.m.YTZ - ORD
1 stop4h 13mAir Canada
Deal found 16/4C$ 302
Tue 13/510:45 a.m.ORD - YYZ
Nonstop1h 57mMultiple Airlines
Tue 13/54:00 p.m.YYZ - ORD
1 stop5h 12mMultiple Airlines
Deal found 16/4C$ 313
Wed 14/56:00 a.m.ORD - YYZ
1 stop7h 19mUnited Airlines
Wed 14/54:30 p.m.YYZ - ORD
Nonstop1h 54mUnited Airlines
Deal found 17/4C$ 320
Sun 22/69:40 a.m.MDW - YUL
1 stop5h 20mPorter Airlines
Thu 26/610:45 a.m.YUL - MDW
1 stop6h 39mPorter Airlines
Deal found 17/4C$ 327
Tue 27/57:19 a.m.ORD - YUL
Nonstop2h 21mAir Canada
Wed 28/51:00 p.m.YUL - ORD
1 stop6h 53mAir Canada
Deal found 17/4C$ 327
Wed 7/56:37 p.m.ORD - YUL
1 stop14h 13mAmerican Airlines
Thu 8/512:30 p.m.YUL - ORD
Nonstop2h 35mAmerican Airlines
Deal found 16/4C$ 352
Thu 8/57:10 a.m.ORD - YYZ
1 stop5h 37mLufthansa
Sun 11/59:00 a.m.YYZ - ORD
Nonstop2h 01mLufthansa
Deal found 17/4C$ 356
Wed 30/45:35 p.m.MDW - YOW
1 stop3h 54mPorter Airlines
Thu 8/512:35 p.m.YOW - MDW
1 stop4h 49mPorter Airlines
Deal found 16/4C$ 359
Fri 15/85:20 p.m.MDW - YTZ
Nonstop1h 42mAir Transat
Mon 18/83:35 p.m.YTZ - MDW
Nonstop1h 49mAir Transat
Deal found 16/4C$ 367

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 April 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

Thu 8/5

5:20 p.m.-8:02 p.m.

Nonstop1h 42m

Toronto Island

Sun 11/5

4:05 p.m.-4:54 p.m.

Nonstop1h 49m

C$ 262

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Sun 1/6

8:25 p.m.-11:07 p.m.

Nonstop1h 42m

Toronto Pearson Intl

Sun 8/6

6:15 a.m.-9:52 a.m.

1 stop4h 37m

C$ 291

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sun 11/5

9:40 a.m.-12:22 p.m.

Nonstop1h 42m

Toronto Island

Tue 20/5

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

Nonstop1h 49m

C$ 298

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Tue 6/5

8:40 a.m.-2:50 p.m.

1 stop5h 10m

Toronto Island

Tue 13/5

8:50 a.m.-12:03 p.m.

1 stop4h 13m

C$ 302

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 13/5

10:45 a.m.-1:42 p.m.

Nonstop1h 57m

Toronto Pearson Intl

Tue 13/5

4:00 p.m.-8:12 p.m.

1 stop5h 12m

C$ 313

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 14/5

6:00 a.m.-2:19 p.m.

1 stop7h 19m

Toronto Pearson Intl

Wed 14/5

4:30 p.m.-5:24 p.m.

Nonstop1h 54m

C$ 320

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Sun 22/6

9:40 a.m.-4:00 p.m.

1 stop5h 20m

Montreal Pierre Elliott Trudeau Intl

Thu 26/6

10:45 a.m.-4:24 p.m.

1 stop6h 39m

C$ 327

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Tue 27/5

7:19 a.m.-10:40 a.m.

Nonstop2h 21m

Montreal Pierre Elliott Trudeau Intl

Wed 28/5

6:40 p.m.-8:12 p.m.

Nonstop2h 32m

C$ 327

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Wed 7/5

6:37 p.m.-9:50 a.m.

1 stop14h 13m

Montreal Pierre Elliott Trudeau Intl

Thu 8/5

12:30 p.m.-2:05 p.m.

Nonstop2h 35m

C$ 352

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 8/5

7:10 a.m.-1:47 p.m.

1 stop5h 37m

Toronto Pearson Intl

Sun 11/5

9:00 a.m.-10:01 a.m.

Nonstop2h 01m

C$ 356

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/4

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 17 April 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 17 April 2025.

The most flights from USIL to CAON are scheduled on a Thursday (57 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (46 on average).

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 April 2025.
Read through reviews of airlines operating flights from Illinois to Ontario, such as Japan Airlines, Alaska Airlines and Porter Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Food

7.7

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.
Japan Airlines
8.3
Very good
1,447 reviews
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Food

7.7

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.
Alaska Airlines
8.0
Very good
9,882 reviews
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Food

7.7

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.
Porter Airlines
8.0
Very good
281 reviews
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Food

7.7

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.
Delta
8.0
Very good
7,917 reviews
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Food

7.7

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.
Air Transat
7.8
Good
385 reviews
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.3

Comfort

8.2

Food

7.7

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.

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$ 146 on Air Canada. Other airlines that offer cheap prices include Delta from C$ 147 and Porter Airlines from C$ 148 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 Pearson Intl flights
Newark to Toronto Island flights
Newark to Pierre Elliott Trudeau Intl flights
Los Angeles to Vancouver Intl flights
John F Kennedy Intl to Vancouver Intl flights
Newark to Vancouver Intl flights
LaGuardia to Pearson Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Pearson Intl flights
O'Hare Intl to Vancouver Intl flights
San Francisco to Vancouver Intl flights
Dulles Intl to Vancouver Intl flights
Dulles Intl to Pearson Intl flights
San Francisco to Pearson Intl flights
Dallas/Fort Worth to Pearson Intl flights
John F Kennedy Intl to Calgary flights
Los Angeles to Pearson Intl flights
Newark to Calgary flights
Denver to Vancouver Intl flights
Reagan-National to Pearson Intl flights
Boston to Pearson Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pearson Intl flights
Seattle to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Boston to Vancouver Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Calgary flights
Seattle to Vancouver Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
Atlanta to Vancouver Intl flights
Minneapolis to Vancouver Intl flights
Hobby to Vancouver Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Hobby to Pearson Intl flights
LaGuardia to Vancouver Intl flights
Boston to Pierre Elliott Trudeau Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
Dulles Intl to Calgary flights
Detroit to Vancouver Intl flights
Boston to Toronto Island flights
Ontario to Vancouver Intl flights
Santa Ana to Vancouver Intl flights
Los Angeles to Calgary flights
George Bush Intcntl to Vancouver Intl flights
Dulles Intl to Toronto Island flights
San Francisco to Calgary flights
Dallas/Fort Worth to Vancouver Intl flights
Atlanta to Pearson Intl flights
San Diego to Vancouver Intl flights

Top 3 airlines flying from Illinois to Ontario

Discover the top 3 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 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 183AverageC$ 481FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 202AverageC$ 461FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 340AverageC$ 422FlexibilityNo cancel feeOn-time52%
Search Porter 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.