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Cheap flights from Illinois to Ontario from C$ 99

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 27/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
25 Feb — 4 Mar1
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 20 February 2025.

Round-trip from

C$ 185

One-way from

C$ 99

Popular in

March

Cheapest in

April

Average price

C$ 459

Good round-trip deal

C$ 257 or less

Good one-way deal

C$ 182 or less
Air Canada
  • Air Canada
  • 25/4-1/5
  • 2 total stops
  • 8h 44m total
  • Illinois to Ontario
Search Deals
27/3
  • 27/3
  • 1 total stop
  • 28h 08m total
  • Illinois to Ontario
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 20 February 2025.

Fri 25/48:25 p.m.ORD - YOW
1 stop4h 09mAir Canada
Thu 1/59:20 a.m.YOW - ORD
1 stop4h 35mAir Canada
Deal found 20/2C$ 185
Fri 4/48:25 p.m.ORD - YYZ
Nonstop1h 41mAir Canada
Wed 9/46:25 a.m.YYZ - ORD
1 stop5h 22mAir Canada
Deal found 20/2C$ 253
Thu 17/47:20 a.m.ORD - YTZ
1 stop6h 30mAir Canada
Mon 21/47:25 a.m.YTZ - ORD
1 stop5h 07mAir Canada
Deal found 20/2C$ 294
Tue 1/46:25 p.m.ORD - YYZ
2 stops28h 30mMultiple Airlines
Tue 8/48:00 p.m.YYZ - ORD
1 stop19h 03mMultiple Airlines
Deal found 20/2C$ 298
Tue 1/46:47 p.m.STL - YYZ
1 stop28h 08mMultiple Airlines
Thu 3/47:05 a.m.YYZ - STL
1 stop11h 47mMultiple Airlines
Deal found 19/2C$ 305
Fri 4/411:15 a.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sun 6/49:30 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 20/2C$ 307
Thu 10/47:49 p.m.ORD - YUL
1 stop18h 06mMultiple Airlines
Mon 14/43:55 p.m.YUL - ORD
1 stop26h 46mMultiple Airlines
Deal found 20/2C$ 322
Tue 1/45:35 p.m.MDW - YTZ
Nonstop1h 42mMultiple Airlines
Tue 8/49:30 a.m.YTZ - MDW
Nonstop1h 50mMultiple Airlines
Deal found 20/2C$ 339
Sun 6/45:15 a.m.MDW - YYZ
1 stop17h 15mMultiple Airlines
Sun 13/47:25 p.m.YYZ - MDW
1 stop10h 55mMultiple Airlines
Deal found 20/2C$ 349
Fri 25/45:35 p.m.MDW - YTZ
Nonstop1h 42mAir Transat
Sun 27/43:50 p.m.YTZ - MDW
Nonstop1h 50mAir Transat
Deal found 19/2C$ 357
Sat 5/412:55 p.m.MDW - YUL
1 stop4h 07mPorter Airlines
Mon 7/46:50 a.m.YUL - MDW
1 stop4h 30mPorter Airlines
Deal found 20/2C$ 365
Thu 24/48:25 p.m.ORD - YYZ
Nonstop1h 41mUnited Airlines
Mon 28/412:20 p.m.YYZ - ORD
Nonstop1h 55mUnited Airlines
Deal found 19/2C$ 386

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 629,999 searches. Data last updated 20 February 2025.

Fly from

Illinois

Fly to

Ontario

Route

Depart

Return

Price

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Fri 25/4

8:25 p.m.-1:34 a.m.

1 stop4h 09m

Ottawa

Thu 1/5

9:20 a.m.-12:55 p.m.

1 stop4h 35m

C$ 185

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 4/4

8:25 p.m.-11:06 p.m.

Nonstop1h 41m

Toronto Pearson Intl

Wed 9/4

6:25 a.m.-10:47 a.m.

1 stop5h 22m

C$ 253

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Thu 17/4

7:20 a.m.-2:50 p.m.

1 stop6h 30m

Toronto Island

Mon 21/4

7:25 a.m.-11:32 a.m.

1 stop5h 07m

C$ 294

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 1/4

12:14 p.m.-11:45 a.m.

1 stop22h 31m

Toronto Pearson Intl

Tue 8/4

8:00 p.m.-2:03 p.m.

1 stop19h 03m

C$ 298

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sat 5/4

12:55 p.m.-3:37 p.m.

Nonstop1h 42m

Toronto Island

Sat 12/4

11:10 a.m.-12:00 p.m.

Nonstop1h 50m

C$ 300

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 1/4

6:47 p.m.-11:55 p.m.

1 stop28h 08m

Toronto Pearson Intl

Thu 3/4

7:05 a.m.-5:52 p.m.

1 stop11h 47m

C$ 305

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 16/4

11:15 a.m.-1:57 p.m.

Nonstop1h 42m

Toronto Island

Wed 23/4

9:30 a.m.-10:20 a.m.

Nonstop1h 50m

C$ 315

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Thu 10/4

7:49 p.m.-2:55 p.m.

1 stop18h 06m

Montreal Pierre Elliott Trudeau Intl

Mon 14/4

3:55 p.m.-5:41 p.m.

1 stop26h 46m

C$ 322

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Sun 6/4

5:15 a.m.-11:30 p.m.

1 stop17h 15m

Toronto Pearson Intl

Sun 13/4

7:25 p.m.-5:20 a.m.

1 stop10h 55m

C$ 349

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 30/5

9:15 a.m.-11:57 a.m.

Nonstop1h 42m

Toronto Island

Mon 2/6

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

Nonstop1h 49m

C$ 355

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/2

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 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 20 February 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 20 February 2025.

The most flights from USIL to CAON are scheduled on a Thursday (54 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (31 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 20 February 2025.
Read through reviews of airlines operating flights from Illinois to Ontario, such as Japan Airlines, Alaska Airlines and Delta. 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
1,440 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20

8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!

Japan Airlines
8.3
Very good
1,440 reviews
Japan Airlines
8.3
Very good
1,440 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20

8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!

Alaska Airlines
8.0
Very good
9,692 reviews
Japan Airlines
8.3
Very good
1,440 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20

8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!

Delta
8.0
Very good
8,220 reviews
Japan Airlines
8.3
Very good
1,440 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20

8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!

Porter Airlines
7.9
Good
276 reviews
Japan Airlines
8.3
Very good
1,440 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20

8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!

Air Transat
7.8
Good
380 reviews
Japan Airlines
8.3
Very good
1,440 reviews
Check prices

Food

7.7

Overall

8.3

Comfort

8.2

Crew

8.7

Entertainment

7.8

Boarding

8.4

Reviews

1 / 20

8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!

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$ 148 on Porter Airlines. Other airlines that offer cheap prices include Air Canada from C$ 149 and United Airlines from C$ 158 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

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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.
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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 20 February 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 187AverageC$ 489FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 201AverageC$ 501FlexibilityNo cancel feeOn-time67%
Search Air Canada 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.

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