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Illinois

$131+ Cheap flights from Ontario to Illinois

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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — ORD
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
1 adult, Economy
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Cheap flight deals from Ontario to Illinois

Keep the following information in mind while searching for Ontario to Illinois flight deals. Data was last updated febrero 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$204
(123 Milhas)

One-way from

$131
(Mytrip)

Popular in

December

Cheapest in

April

Average price

$285

Good round-trip deal

$228 or less

Good one-way deal

$119 or less
Provider with most accurate pricing for Toronto (YTO)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Toronto (YTO)-Chicago (CHI) flights.
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From Ontario to Illinois
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One-way flight from Ontario to Illinois
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Highest demand for flights based on searches. 4% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Price to beat on a round-trip flight from Ontario to Illinois.
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Price to beat on a one-way flight from Ontario to Illinois.
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Find flight deals from Ontario to Illinois

Cheapest flights from Ontario to Illinois
Explore the most affordable flight options available from Ontario to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 20, 2025.

This 123 Milhas deal was found by Cheapflights users on 2/20. 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 123 Milhas is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/244:00 pmYYZ - ORD
1 stop5h 12mAir Canada
sáb. 6/710:40 amORD - YYZ
1 stop6h 18mAir Canada
Deal found 2/20$204
This Kiwi.com deal was found by Cheapflights users on 2/19. 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.
jue. 3/203:50 pmYTZ - MDW
Nonstop1h 50mPorter Airlines
lun. 3/245:35 pmMDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 2/19$204
This 123 Milhas deal was found by Cheapflights users on 2/20. 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 123 Milhas is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/2410:25 amYTZ - ORD
1 stop5h 30mAir Canada
sáb. 6/710:40 amORD - YTZ
1 stop6h 10mAir Canada
Deal found 2/20$204
This Trip.com deal was found by Cheapflights users on 2/18. 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.
jue. 3/203:50 pmYTZ - MDW
Nonstop1h 50mAir Transat
jue. 3/275:35 pmMDW - YTZ
Nonstop1h 42mAir Transat
Deal found 2/18$223
This Mytrip deal was found by Cheapflights users on 2/19. 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.
sáb. 3/227:55 pmYYZ - ORD
1 stop13h 40mMultiple Airlines
mar. 3/256:25 pmORD - YYZ
2 stops28h 30mMultiple Airlines
Deal found 2/19$224
This Kissandfly.com deal was found by Cheapflights users on 2/19. 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.
jue. 3/205:30 pmYYZ - ORD
Nonstop2h 09mLufthansa
lun. 3/249:12 pmORD - YYZ
Nonstop1h 47mLufthansa
Deal found 2/19$236
This Kiwi.com deal was found by Cheapflights users on 2/20. 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.
vie. 4/189:30 amYTZ - MDW
Nonstop1h 50mMultiple Airlines
sáb. 4/1912:55 pmMDW - YTZ
Nonstop1h 42mMultiple Airlines
Deal found 2/20$244
This CheapTicketsDeal deal was found by Cheapflights users on 2/20. 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 CheapTicketsDeal is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/126:30 amYYZ - MDW
1 stop13h 03mWestJet
dom. 4/2010:20 amMDW - YYZ
1 stop24h 14mWestJet
Deal found 2/20$244
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/2612:45 pmYYZ - ORD
1 stop4h 59mUnited Airlines
mié. 4/3011:15 amORD - YYZ
1 stop4h 54mUnited Airlines
Deal found 2/20$246
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/1812:15 pmYYZ - MDW
1 stop7h 05mDelta
mar. 4/223:02 pmMDW - YYZ
1 stop6h 53mDelta
Deal found 2/20$246
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/189:45 amYYZ - ORD
1 stop7h 23mDelta
sáb. 4/195:00 pmORD - YYZ
1 stop4h 55mDelta
Deal found 2/20$253
This American Airlines deal was found by Cheapflights users on 2/19. 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.
sáb. 5/31:15 pmYYZ - ORD
Nonstop1h 55mAmerican Airlines
sáb. 5/109:45 amORD - YYZ
1 stop6h 35mAmerican Airlines
Deal found 2/19$258

Find flights from Ontario to Illinois within your budget

Customize your flight search to find flights from Ontario to Illinois 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 febrero 20, 2025.

Fly from

Ontario

Fly to

Illinois

Route

Depart

Return

Price

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

sáb. 5/24

4:00 pm-8:12 pm

1 stop5h 12m

Chicago O'Hare Intl

sáb. 6/7

10:40 am-5:58 pm

1 stop6h 18m

$204

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

jue. 3/20

3:50 pm-4:40 pm

Nonstop1h 50m

Chicago Midway

lun. 3/24

5:35 pm-8:17 pm

Nonstop1h 42m

$204

TorontoChicago

YTZ - ORD

YTZORD

Toronto Island

sáb. 5/24

10:25 am-2:55 pm

1 stop5h 30m

Chicago O'Hare Intl

sáb. 6/7

10:40 am-5:50 pm

1 stop6h 10m

$204

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

sáb. 3/22

7:55 pm-8:35 am

1 stop13h 40m

Chicago O'Hare Intl

mar. 3/25

6:25 pm-11:55 pm

2 stops28h 30m

$224

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

lun. 3/17

9:30 am-10:20 am

Nonstop1h 50m

Chicago Midway

jue. 3/20

5:35 pm-8:17 pm

Nonstop1h 42m

$229

TorontoChicago

YYZ - MDW

YYZMDW

Toronto Pearson Intl

sáb. 4/12

6:30 am-6:33 pm

1 stop13h 03m

Chicago Midway

lun. 4/21

1:16 pm-11:34 am

1 stop21h 18m

$244

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

vie. 4/18

9:30 am-10:20 am

Nonstop1h 50m

Chicago Midway

sáb. 4/19

12:55 pm-3:37 pm

Nonstop1h 42m

$244

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

sáb. 4/26

12:45 pm-4:44 pm

1 stop4h 59m

Chicago O'Hare Intl

mié. 4/30

11:15 am-5:09 pm

1 stop4h 54m

$246

TorontoChicago

YYZ - MDW

YYZMDW

Toronto Pearson Intl

jue. 3/20

10:20 am-12:36 pm

1 stop3h 16m

Chicago Midway

lun. 3/24

2:55 pm-10:38 pm

1 stop6h 43m

$247

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

vie. 4/18

9:45 am-4:08 pm

1 stop7h 23m

Chicago O'Hare Intl

sáb. 4/19

5:00 pm-10:55 pm

1 stop4h 55m

$253

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 60 results
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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
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 Ontario to Illinois

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

What is the cheapest month to book a flight from Region of Ontario to Illinois?

Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Illinois (average of $245). Flying from Region of Ontario to Illinois in March is currently the most expensive (average of $321). 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?

Find hourly flight availability from Ontario to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated febrero 20, 2025.

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

Weekly flight availability from Region of Ontario to Illinois

Explore weekly flight availability from Ontario to Illinois. 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 febrero 20, 2025.

The most flights from CAON to USIL are scheduled on a Thursday (53 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (38 on average).

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated febrero 20, 2025.
See what other customers who have flown with Alaska Airlines, Delta and Porter Airlines from Ontario to Illinois have to say. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,692 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

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
9,692 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

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
8,220 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

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
276 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

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
1,333 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

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
380 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

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 Ontario to Illinois. 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 Region of Ontario to Illinois one-way?

    $131 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 Air Canada and United Airlines, with prices starting from $132 and $136, 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, August is the cheapest month in which you can book a flight from Region of Ontario to Illinois (average of $245). Flying from Region of Ontario to Illinois in March is currently the most expensive (average of $321). 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 Ontario to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Newark flights
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Top 4 airlines flying from Ontario to Illinois

Discover the top 4 airlines that operate flights from Ontario to Illinois. 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 febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$194Average$308FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$210Average$425FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$233Average$435FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$236Average$401FlexibilityNo cancel feeOn-time71%
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