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Cheap flights from Ontario to Illinois from C$ 201

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 25/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — ORD
27 Dec — 3 Jan1
1 adult

Cheap flight deals from Ontario to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (CAON) to Illinois (USIL). 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 22 December 2024.

Round-trip from

C$ 330

One-way from

C$ 201
Porter Airlines
  • Porter Airlines
  • 14/2-17/2
  • Nonstop
  • 3h 32m total
  • Ontario to Illinois
Search Deals
Porter Airlines
  • Porter Airlines
  • 25/1
  • Nonstop
  • 1h 50m total
  • Ontario to Illinois
Search Deals

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 22 December 2024.

Sat 28/129:40 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Fri 31/11:05 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Deal found 21/12C$ 464
Sat 28/1211:35 a.m.YYZ - ORD
Nonstop2h 00mAmerican Airlines
Fri 31/19:49 a.m.ORD - YYZ
Nonstop1h 41mAmerican Airlines
Deal found 21/12C$ 486
Sat 28/126:25 a.m.YYZ - ORD
1 stop5h 29mAir Canada
Fri 31/17:20 a.m.ORD - YYZ
1 stop5h 21mAir Canada
Deal found 21/12C$ 517
Sat 28/126:50 a.m.YUL - MDW
1 stop4h 40mPorter Airlines
Wed 15/11:05 p.m.MDW - YUL
1 stop5h 20mPorter Airlines
Deal found 21/12C$ 542
Sat 28/129:40 a.m.YTZ - MDW
Nonstop1h 50mAir Transat
Sat 4/15:35 p.m.MDW - YTZ
Nonstop1h 42mAir Transat
Deal found 21/12C$ 572
Mon 30/126:52 a.m.YYZ - ORD
Nonstop2h 13mMultiple Airlines
Tue 31/129:50 a.m.ORD - YYZ
Nonstop1h 41mMultiple Airlines
Deal found 20/12C$ 575
Thu 26/125:15 p.m.YYZ - ORD
1 stop24h 25mWestJet
Wed 29/16:45 a.m.ORD - YYZ
1 stop15h 07mWestJet
Deal found 21/12C$ 596
Mon 30/1210:00 a.m.YYZ - ORD
1 stop9h 42mUnited Airlines
Tue 31/129:05 p.m.ORD - YYZ
1 stop11h 53mUnited Airlines
Deal found 20/12C$ 599
Wed 25/121:00 p.m.YYZ - MDW
1 stop4h 10mDelta
Sat 25/19:34 a.m.MDW - YYZ
1 stop6h 57mDelta
Deal found 21/12C$ 609
Wed 25/1210:25 a.m.YTZ - ORD
1 stop5h 20mAir Canada
Sat 25/12:01 p.m.ORD - YTZ
1 stop4h 49mAir Canada
Deal found 21/12C$ 629
Thu 26/1212:12 p.m.YYZ - MDW
1 stop10h 54mWestJet
Wed 29/110:19 a.m.MDW - YYZ
1 stop11h 52mWestJet
Deal found 21/12C$ 655
Fri 27/123:50 p.m.YTZ - MDW
Nonstop1h 50mMultiple Airlines
Mon 30/126:00 a.m.MDW - YTZ
2 stops9h 58mMultiple Airlines
Deal found 20/12C$ 713

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 629,999 searches. Data last updated 22 December 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Fri 14/2

11:20 a.m.-12:10 p.m.

Nonstop1h 50m

Chicago Midway

Mon 17/2

1:05 p.m.-3:47 p.m.

Nonstop1h 42m

C$ 330

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Sun 26/1

7:00 a.m.-2:23 p.m.

1 stop8h 23m

Chicago O'Hare Intl

Wed 29/1

5:11 a.m.-11:55 p.m.

1 stop17h 44m

C$ 355

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 23/1

1:14 p.m.-2:14 p.m.

Nonstop2h 00m

Chicago O'Hare Intl

Mon 27/1

6:35 p.m.-9:20 p.m.

Nonstop1h 45m

C$ 368

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Tue 4/2

11:31 a.m.-12:31 p.m.

Nonstop2h 00m

Chicago O'Hare Intl

Tue 11/2

3:00 p.m.-5:35 p.m.

Nonstop1h 35m

C$ 391

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Thu 13/2

11:20 a.m.-12:10 p.m.

Nonstop1h 50m

Chicago Midway

Sun 16/2

1:05 p.m.-3:47 p.m.

Nonstop1h 42m

C$ 401

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Sun 19/1

7:45 a.m.-12:55 p.m.

1 stop6h 10m

Chicago O'Hare Intl

Fri 24/1

6:45 a.m.-11:59 a.m.

1 stop4h 14m

C$ 402

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 13/2

10:10 a.m.-12:55 p.m.

1 stop3h 45m

Chicago O'Hare Intl

Sat 15/2

4:15 p.m.-11:07 p.m.

1 stop5h 52m

C$ 408

TorontoChicago

YYZ - MDW

YYZMDW

Toronto Pearson Intl

Sat 18/1

6:30 a.m.-10:36 a.m.

1 stop5h 06m

Chicago Midway

Sun 2/2

1:26 p.m.-11:11 p.m.

1 stop8h 45m

C$ 408

TorontoChicago

YTZ - ORD

YTZORD

Toronto Island

Thu 23/1

3:25 p.m.-7:55 p.m.

1 stop5h 30m

Chicago O'Hare Intl

Mon 27/1

3:35 p.m.-9:50 p.m.

1 stop5h 15m

C$ 411

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Sat 11/1

6:50 a.m.-12:10 p.m.

1 stop6h 20m

Chicago Midway

Sun 12/1

1:05 p.m.-7:25 p.m.

1 stop5h 20m

C$ 415

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/12

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, January is the cheapest month in which you can book a flight from Region of Ontario to Illinois (average of C$ 261). Flying from Region of Ontario to Illinois in March is currently the most expensive (average of C$ 355). 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 22 December 2024.

When flying from Region of Ontario to Illinois, 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 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 22 December 2024.

The most flights from CAON to USIL are scheduled on a Monday (51 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (36 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 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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 22 December 2024.
To help decide which airline to fly from Ontario to Illinois, see what other customers have to say about Air Canada, Delta and Lufthansa. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,594 reviews
Check prices

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,594 reviews
Delta
8.0
Very good
8,594 reviews
Check prices

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Alaska Airlines
8.0
Very good
9,537 reviews
Delta
8.0
Very good
8,594 reviews
Check prices

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Porter Airlines
7.9
Good
283 reviews
Delta
8.0
Very good
8,594 reviews
Check prices

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air Transat
7.8
Good
384 reviews
Delta
8.0
Very good
8,594 reviews
Check prices

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines
7.6
Good
785 reviews
Delta
8.0
Very good
8,594 reviews
Check prices

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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?

    For one-way options, check prices for Porter Airlines. According to our data, you can fly for as low as C$ 201. Users have also found prices from C$ 218 and C$ 236 on American Airlines and United Airlines, 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, January is the cheapest month in which you can book a flight from Region of Ontario to Illinois (average of C$ 261). Flying from Region of Ontario to Illinois in March is currently the most expensive (average of C$ 355). 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.
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Top 5 airlines flying from Ontario to Illinois

Discover the top 5 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 629,999 searches. Data last updated 22 December 2024.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 278AverageC$ 425FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 314AverageC$ 552FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 358AverageC$ 788FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 359AverageC$ 550FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
WestJetCheapestC$ 456AverageC$ 596FlexibilityNo cancel feeOn-time60%
Search WestJet 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 Ontario to Illinois?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Illinois. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Illinois?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario to Illinois.

Can Cheapflights find flights from Ontario to Illinois with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Illinois flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ontario to Illinois become cheaper?

Yes, Cheapflights offers price alerts on Ontario to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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