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Cheap flights from Illinois to Ontario from C$ 108

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
17 Jun — 24 Jun1
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 12 June 2025.

Round-trip from

C$ 231

One-way from

C$ 108

Popular in

November

Cheapest in

July

Average price

C$ 383

Good round-trip deal

C$ 238 or less

Good one-way deal

C$ 111 or less
Porter Airlines
  • Porter Airlines
  • 18/9-20/9
  • Nonstop
  • 3h 31m total
  • Illinois to Ontario
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American Airlines
  • American Airlines
  • 1/9
  • 1 total stop
  • 6h 29m total
  • Illinois to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 38 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).
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Average for round-trip flights in June 2025
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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 12 June 2025.

Thu 18/95:20 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Sat 20/97:30 a.m.YTZ - MDW
Nonstop1h 49mPorter Airlines
Deal found 12/6C$ 231
Mon 29/92:00 p.m.ORD - YYZ
Nonstop1h 43mAir Canada
Wed 1/104:40 p.m.YYZ - ORD
Nonstop1h 53mAir Canada
Deal found 12/6C$ 237
Thu 18/99:31 p.m.ORD - YYZ
1 stop11h 33mUnited Airlines
Wed 24/95:15 p.m.YYZ - ORD
Nonstop1h 57mUnited Airlines
Deal found 10/6C$ 242
Tue 24/69:40 a.m.MDW - YTZ
Nonstop1h 42mMultiple Airlines
Thu 26/67:55 a.m.YTZ - MDW
Nonstop1h 50mMultiple Airlines
Deal found 12/6C$ 269
Tue 15/76:00 a.m.ORD - YYZ
1 stop5h 05mAmerican Airlines
Tue 15/73:45 p.m.YYZ - ORD
1 stop6h 46mAmerican Airlines
Deal found 12/6C$ 282
Wed 13/89:40 a.m.MDW - YTZ
Nonstop1h 40mAir Transat
Sat 16/87:55 a.m.YTZ - MDW
Nonstop1h 50mAir Transat
Deal found 11/6C$ 295
Fri 12/910:40 a.m.ORD - YTZ
1 stop5h 05mAir Canada
Sat 20/93:25 p.m.YTZ - ORD
1 stop5h 46mAir Canada
Deal found 11/6C$ 302
Sat 26/79:25 p.m.ORD - YYZ
1 stop10h 54mMultiple Airlines
Sat 2/89:45 a.m.YYZ - ORD
1 stop7h 48mMultiple Airlines
Deal found 11/6C$ 317
Tue 23/97:00 a.m.ORD - YYZ
1 stop3h 29mDelta
Fri 26/93:59 p.m.YYZ - ORD
1 stop3h 39mDelta
Deal found 11/6C$ 320
Tue 23/95:59 p.m.MDW - YYZ
1 stop3h 59mDelta
Tue 30/93:59 p.m.YYZ - MDW
1 stop3h 37mDelta
Deal found 11/6C$ 320
Fri 18/75:20 p.m.MDW - YTZ
Nonstop1h 42mAPG Airlines
Sun 20/77:55 a.m.YTZ - MDW
Nonstop1h 50mAPG Airlines
Deal found 11/6C$ 331
Thu 24/79:40 a.m.MDW - YOW
1 stop8h 13mPorter Airlines
Tue 29/79:35 a.m.YOW - MDW
1 stop7h 49mPorter Airlines
Deal found 12/6C$ 349

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 12 June 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 18/9

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

Nonstop1h 42m

Toronto Island

Sat 20/9

7:30 a.m.-8:19 a.m.

Nonstop1h 49m

C$ 231

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Mon 29/9

2:00 p.m.-4:43 p.m.

Nonstop1h 43m

Toronto Pearson Intl

Wed 1/10

4:40 p.m.-5:33 p.m.

Nonstop1h 53m

C$ 237

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 18/9

9:31 p.m.-10:04 a.m.

1 stop11h 33m

Toronto Pearson Intl

Wed 24/9

5:15 p.m.-6:12 p.m.

Nonstop1h 57m

C$ 242

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Tue 24/6

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

Nonstop1h 42m

Toronto Island

Thu 26/6

7:55 a.m.-8:45 a.m.

Nonstop1h 50m

C$ 269

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 15/7

6:00 a.m.-12:05 p.m.

1 stop5h 05m

Toronto Pearson Intl

Tue 15/7

3:45 p.m.-9:31 p.m.

1 stop6h 46m

C$ 282

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 13/8

9:40 a.m.-12:20 p.m.

Nonstop1h 40m

Toronto Island

Sat 16/8

7:55 a.m.-8:45 a.m.

Nonstop1h 50m

C$ 295

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Fri 12/9

10:40 a.m.-4:45 p.m.

1 stop5h 05m

Toronto Island

Sat 20/9

3:25 p.m.-8:11 p.m.

1 stop5h 46m

C$ 302

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Sat 26/7

9:25 p.m.-9:19 a.m.

1 stop10h 54m

Toronto Pearson Intl

Sat 2/8

9:45 a.m.-4:33 p.m.

1 stop7h 48m

C$ 317

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 23/9

6:00 a.m.-11:29 a.m.

1 stop4h 29m

Toronto Pearson Intl

Wed 1/10

2:40 p.m.-7:17 p.m.

1 stop5h 37m

C$ 320

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Tue 23/9

5:59 p.m.-10:58 p.m.

1 stop3h 59m

Toronto Pearson Intl

Sat 27/9

6:00 a.m.-8:45 a.m.

1 stop3h 45m

C$ 320

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

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.

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$ 255). 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 12 June 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 12 June 2025.

The most flights from USIL to CAON are scheduled on a Thursday (62 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (27 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 12 June 2025.
Read through reviews of airlines operating flights from Illinois to Ontario, such as Japan Airlines, Porter 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
1,490 reviews
Check prices

Food

7.7

Entertainment

7.8

Boarding

8.4

Overall

8.3

Comfort

8.2

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Japan Airlines
8.3
Very good
1,490 reviews
Japan Airlines
8.3
Very good
1,490 reviews
Check prices

Food

7.7

Entertainment

7.8

Boarding

8.4

Overall

8.3

Comfort

8.2

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Porter Airlines
8.0
Very good
288 reviews
Japan Airlines
8.3
Very good
1,490 reviews
Check prices

Food

7.7

Entertainment

7.8

Boarding

8.4

Overall

8.3

Comfort

8.2

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Delta
8.0
Very good
7,946 reviews
Japan Airlines
8.3
Very good
1,490 reviews
Check prices

Food

7.7

Entertainment

7.8

Boarding

8.4

Overall

8.3

Comfort

8.2

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
Air Transat
7.8
Good
396 reviews
Japan Airlines
8.3
Very good
1,490 reviews
Check prices

Food

7.7

Entertainment

7.8

Boarding

8.4

Overall

8.3

Comfort

8.2

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.
United Airlines
7.4
Good
8,790 reviews
Japan Airlines
8.3
Very good
1,490 reviews
Check prices

Food

7.7

Entertainment

7.8

Boarding

8.4

Overall

8.3

Comfort

8.2

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

DFW - NRT

This flight was operated by American Airlines. The food was barely tolerable. Mid flight sandwich was ice cold, could not be bothered to warm it up. Staff did not seem to like their jobs very much. Too many seats packed in to maximize profit. A true “cattle car” experience. Subsequent flight from Tokyo to HCMC was on Japan Airlines which was excellent. No comparison between JAL and AA. Unfortunately that’s just the way service is in America nowadays.

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$ 108 on American Airlines. Other airlines that offer cheap prices include Porter Airlines from C$ 109 and Air Canada from C$ 109 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$ 255). 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 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 201AverageC$ 456FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 211AverageC$ 402FlexibilityNo cancel feeOn-time69%
Search United 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.

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