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Cheap flights from Illinois to Ontario from C$ 134

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 22/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
5 mai — 12 mai1
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 30 avril 2025.

Round-trip from

C$ 246

One-way from

C$ 134

Popular in

November

Cheapest in

July

Average price

C$ 464

Good round-trip deal

C$ 234 or less

Good one-way deal

C$ 145 or less
Porter Airlines
  • Porter Airlines
  • 20/6-24/6
  • Nonstop
  • 3h 29m total
  • Illinois to Ontario
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Air Transat
  • Air Transat
  • 22/7
  • Nonstop
  • 1h 40m total
  • Illinois to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 26 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 30 avril 2025.

ven. 20/69:40 a.m.MDW - YTZ
Nonstop1h 40mPorter Airlines
mar. 24/63:35 p.m.YTZ - MDW
Nonstop1h 49mPorter Airlines
Deal found 29/4C$ 246
ven. 13/68:25 p.m.ORD - YYZ
Nonstop1h 42mAir Canada
ven. 20/62:10 p.m.YYZ - ORD
Nonstop1h 54mAir Canada
Deal found 29/4C$ 262
jeu. 12/69:40 a.m.MDW - YTZ
Nonstop1h 40mMultiple Airlines
jeu. 19/67:55 a.m.YTZ - MDW
Nonstop1h 50mMultiple Airlines
Deal found 29/4C$ 264
jeu. 4/910:40 a.m.ORD - YTZ
1 stop5h 05mAir Canada
dim. 7/93:25 p.m.YTZ - ORD
1 stop5h 46mAir Canada
Deal found 29/4C$ 277
ven. 1/89:40 a.m.MDW - YTZ
Nonstop1h 40mAir Transat
mar. 5/83:35 p.m.YTZ - MDW
Nonstop1h 49mAir Transat
Deal found 29/4C$ 327
jeu. 29/55:20 p.m.MDW - YUL
1 stop3h 55mPorter Airlines
mar. 3/61:10 p.m.YUL - MDW
1 stop4h 14mPorter Airlines
Deal found 28/4C$ 343
dim. 8/69:55 a.m.ORD - YYZ
Nonstop1h 45mAmerican Airlines
dim. 15/61:20 p.m.YYZ - ORD
Nonstop1h 55mAmerican Airlines
Deal found 29/4C$ 357
ven. 13/69:40 a.m.MDW - YTZ
Nonstop1h 40mAPG Airlines
ven. 20/67:55 a.m.YTZ - MDW
Nonstop1h 50mAPG Airlines
Deal found 29/4C$ 358
mer. 11/612:41 p.m.ORD - YYZ
1 stop24h 24mMultiple Airlines
sam. 14/66:30 a.m.YYZ - ORD
1 stop18h 15mMultiple Airlines
Deal found 29/4C$ 363
sam. 7/68:10 a.m.ORD - YUL
Nonstop2h 20mAmerican Airlines
sam. 7/62:35 p.m.YUL - ORD
1 stop10h 22mAmerican Airlines
Deal found 29/4C$ 382
mer. 4/67:19 a.m.ORD - YUL
Nonstop2h 21mAir Canada
mar. 24/66:15 a.m.YUL - ORD
Nonstop2h 44mAir Canada
Deal found 28/4C$ 408
mer. 4/610:30 a.m.ORD - YYZ
1 stop6h 29mDelta
jeu. 19/63:31 p.m.YYZ - ORD
1 stop5h 56mDelta
Deal found 30/4C$ 418

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 30 avril 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

ven. 12/9

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

Nonstop1h 42m

Toronto Island

dim. 14/9

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

Nonstop1h 49m

C$ 233

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

jeu. 12/6

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

Nonstop1h 40m

Toronto Island

jeu. 19/6

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

Nonstop1h 50m

C$ 237

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

ven. 13/6

8:25 p.m.-11:07 p.m.

Nonstop1h 42m

Toronto Pearson Intl

ven. 20/6

2:10 p.m.-3:04 p.m.

Nonstop1h 54m

C$ 262

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

dim. 10/8

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

Nonstop1h 40m

Toronto Island

ven. 15/8

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

Nonstop1h 49m

C$ 270

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

jeu. 4/9

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

1 stop5h 05m

Toronto Island

dim. 7/9

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

1 stop5h 46m

C$ 277

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

mar. 24/6

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

Nonstop1h 42m

Toronto Island

ven. 27/6

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

Nonstop1h 50m

C$ 325

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

dim. 8/6

9:55 a.m.-12:40 p.m.

Nonstop1h 45m

Toronto Pearson Intl

dim. 15/6

1:20 p.m.-2:15 p.m.

Nonstop1h 55m

C$ 357

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

mer. 11/6

12:41 p.m.-2:05 p.m.

1 stop24h 24m

Toronto Pearson Intl

sam. 14/6

6:30 a.m.-11:45 p.m.

1 stop18h 15m

C$ 363

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

jeu. 29/5

2:16 p.m.-9:41 p.m.

1 stop6h 25m

Montreal Pierre Elliott Trudeau Intl

dim. 1/6

8:20 a.m.-9:52 a.m.

Nonstop2h 32m

C$ 370

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

mar. 20/5

5:20 p.m.-10:15 p.m.

1 stop3h 55m

Montreal Pierre Elliott Trudeau Intl

jeu. 22/5

1:10 p.m.-4:24 p.m.

1 stop4h 14m

C$ 385

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

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$ 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 30 avril 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 30 avril 2025.

The most flights from USIL to CAON are scheduled on a Tuesday (57 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (34 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 30 avril 2025.
Read through reviews of airlines operating flights from Illinois to Ontario, such as Alaska 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.
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Porter Airlines
8.0
Very good
285 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
KLM
7.8
Good
1,333 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Air Transat
7.8
Good
385 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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$ 134 on Air Transat. Other airlines that offer cheap prices include Air Canada from C$ 134 and Porter Airlines from C$ 143 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

Browse thousands of different options on Cheapflights for your next trip

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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 3 airlines flying from Illinois to Ontario

Discover the top 3 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 30 avril 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 182AverageC$ 476FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 202AverageC$ 457FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 339AverageC$ 421FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights

Fly with Cheapflights

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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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