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$105+ Cheap flights from Illinois to Ontario

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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Illinois to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to Ontario (CAON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$197
(flugladen.de)

One-way from

$108
(Kiwi.com)

Good round-trip deal

$241 or less

Good one-way deal

$189 or less
From Illinois to Ontario
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One-way flight from Illinois to Ontario
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Price to beat on a round-trip flight from Illinois to Ontario.
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Price to beat on a one-way flight from Illinois to Ontario.
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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 January 21, 2025.

This Trip.com deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/251:05 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Thu 2/2711:20 amYTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 1/21$200
This Mytrip deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/131:05 pmMDW - YTZ
Nonstop1h 42mMultiple Airlines
Sun 2/1611:20 amYTZ - MDW
Nonstop1h 50mMultiple Airlines
Deal found 1/21$218
This Trip.com deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/311:15 amMDW - YTZ
Nonstop1h 42mAir Transat
Mon 4/73:50 pmYTZ - MDW
Nonstop1h 50mAir Transat
Deal found 1/20$240
This Trip.com deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/281:05 pmMDW - YUL
1 stop5h 20mPorter Airlines
Sun 3/26:50 amYUL - MDW
1 stop4h 30mPorter Airlines
Deal found 1/20$247
This Kiwi.com deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/257:10 amORD - YUL
1 stop9h 25mMultiple Airlines
Tue 3/116:35 pmYUL - ORD
1 stop15h 54mMultiple Airlines
Deal found 1/20$258
This Mytrip deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/510:25 amORD - YYZ
1 stop12h 30mMultiple Airlines
Wed 3/1212:25 pmYYZ - ORD
1 stop12h 42mMultiple Airlines
Deal found 1/20$258
This Mytrip deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1811:35 amORD - YTZ
1 stop5h 15mAir Canada
Wed 3/198:50 amYTZ - ORD
1 stop5h 06mAir Canada
Deal found 1/21$261
This Mytrip deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/45:00 amORD - YTZ
2 stops16h 23mMultiple Airlines
Tue 3/112:00 pmYTZ - ORD
2 stops20h 29mMultiple Airlines
Deal found 1/20$270
This Mytrip deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/182:05 pmORD - YYZ
Nonstop1h 41mAir Canada
Wed 3/192:00 pmYYZ - ORD
Nonstop1h 51mAir Canada
Deal found 1/21$281
This Kiwi.com deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/510:25 amORD - YOW
1 stop8h 50mMultiple Airlines
Wed 3/124:20 pmYOW - ORD
1 stop8h 47mMultiple Airlines
Deal found 1/21$296
This American Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/143:00 pmORD - YYZ
Nonstop1h 30mAmerican Airlines
Tue 2/1811:31 amYYZ - ORD
Nonstop2h 00mAmerican Airlines
Deal found 1/21$297
This Kissandfly.com deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/69:50 amORD - YYZ
Nonstop1h 40mBritish Airways
Mon 3/106:15 pmYYZ - ORD
1 stop5h 32mBritish Airways
Deal found 1/21$298

Find flights from Illinois to Ontario within your budget

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 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 2/13

1:05 pm-3:47 pm

Nonstop1h 42m

Toronto Island

Sun 2/16

11:20 am-12:10 pm

Nonstop1h 50m

$197

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 3/6

11:15 am-1:57 pm

Nonstop1h 42m

Toronto Island

Thu 3/13

3:50 pm-4:40 pm

Nonstop1h 50m

$212

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sat 3/22

12:55 pm-3:37 pm

Nonstop1h 42m

Toronto Island

Wed 3/26

9:30 am-10:20 am

Nonstop1h 50m

$240

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Fri 2/28

1:05 pm-7:25 pm

1 stop5h 20m

Montreal Pierre Elliott Trudeau Intl

Sun 3/2

6:50 am-10:20 am

1 stop4h 30m

$247

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Thu 3/6

1:58 pm-8:43 pm

1 stop5h 45m

Toronto Island

Thu 3/13

10:25 am-2:45 pm

1 stop5h 20m

$254

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 3/11

10:25 am-12:12 am

1 stop12h 47m

Toronto Pearson Intl

Wed 3/19

12:25 pm-12:07 am

1 stop12h 42m

$256

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Tue 2/25

7:10 am-5:35 pm

1 stop9h 25m

Montreal Pierre Elliott Trudeau Intl

Tue 3/11

6:35 pm-9:29 am

1 stop15h 54m

$258

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Sat 3/22

9:15 pm-11:59 pm

Nonstop1h 44m

Toronto Pearson Intl

Fri 3/28

12:20 pm-1:11 pm

Nonstop1h 51m

$260

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Tue 3/4

5:00 am-10:23 pm

2 stops16h 23m

Toronto Island

Tue 3/11

2:00 pm-9:29 am

2 stops20h 29m

$270

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Sat 4/12

9:55 am-12:35 pm

Nonstop1h 40m

Toronto Pearson Intl

Fri 4/18

11:35 am-12:30 pm

Nonstop1h 55m

$284

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 60 results
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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.

Travel insights for flights from Illinois to Ontario

Get recent, data-driven insights about flights from Illinois to Ontario including ideal travel times, pricing trends, and more.

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 $243). Flying from Illinois to Region of Ontario in July is currently the most expensive (average of $359). 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 January 21, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Region of Ontario as you normally would.

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 January 21, 2025.

The most flights from USIL to CAON are scheduled on a Monday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (41 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 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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 January 21, 2025.
Read through reviews of airlines operating flights from Illinois to Ontario, such as Air Canada, American Airlines and United Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,706 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines
8.0
Very good
9,706 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta
8.0
Very good
8,521 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Porter Airlines
7.9
Good
277 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

KLM
7.8
Good
1,341 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Air Transat
7.8
Good
381 reviews
Alaska Airlines
8.0
Very good
9,706 reviews

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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?

    $111 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on American Airlines and Air Canada, with prices starting from $124 and $127, respectively.

  • 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 $243). Flying from Illinois to Region of Ontario in July is currently the most expensive (average of $359). 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

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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
John F Kennedy Intl to Pearson Intl flights
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Top 4 airlines flying from Illinois to Ontario

Discover the top 4 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 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$122Average$342FlexibilityNo cancel feeOn-time52%
American AirlinesCheapest$122Average$333FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$122Average$446FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$148Average$552FlexibilityNo cancel feeOn-time69%
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