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Cheap flights from Chicago 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.
CHI — YYZ
5 May — 12 May1
1 adult

Cheap flight deals from Chicago to Ontario

Keep the following information in mind while searching for Chicago to Ontario flight deals. Data was last updated 30 April 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
  • Chicago to Ontario
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Air Transat
  • Air Transat
  • 22/7
  • Nonstop
  • 1h 40m total
  • Chicago to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 26 potential increase over avg. RT price).
Search Deals
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 Chicago (CHI) to Ontario.
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to Ontario.
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Find flight deals from Chicago to Ontario

Cheapest flights from Chicago to Ontario
Explore the most affordable flight options available from Chicago to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Fri 20/69:40 a.m.MDW - YTZ
Nonstop1h 40mPorter Airlines
Tue 24/63:35 p.m.YTZ - MDW
Nonstop1h 49mPorter Airlines
Deal found 29/4C$ 246
Fri 13/68:25 p.m.ORD - YYZ
Nonstop1h 42mAir Canada
Fri 20/62:10 p.m.YYZ - ORD
Nonstop1h 54mAir Canada
Deal found 29/4C$ 262
Thu 12/69:40 a.m.MDW - YTZ
Nonstop1h 40mMultiple Airlines
Thu 19/67:55 a.m.YTZ - MDW
Nonstop1h 50mMultiple Airlines
Deal found 29/4C$ 264
Thu 4/910:40 a.m.ORD - YTZ
1 stop5h 05mAir Canada
Sun 7/93:25 p.m.YTZ - ORD
1 stop5h 46mAir Canada
Deal found 29/4C$ 277
Fri 1/89:40 a.m.MDW - YTZ
Nonstop1h 40mAir Transat
Tue 5/83:35 p.m.YTZ - MDW
Nonstop1h 49mAir Transat
Deal found 29/4C$ 327
Thu 29/55:20 p.m.MDW - YUL
1 stop3h 55mPorter Airlines
Tue 3/61:10 p.m.YUL - MDW
1 stop4h 14mPorter Airlines
Deal found 28/4C$ 343
Sun 8/69:55 a.m.ORD - YYZ
Nonstop1h 45mAmerican Airlines
Sun 15/61:20 p.m.YYZ - ORD
Nonstop1h 55mAmerican Airlines
Deal found 29/4C$ 357
Fri 13/69:40 a.m.MDW - YTZ
Nonstop1h 40mAPG Airlines
Fri 20/67:55 a.m.YTZ - MDW
Nonstop1h 50mAPG Airlines
Deal found 29/4C$ 358
Wed 11/612:41 p.m.ORD - YYZ
1 stop24h 24mMultiple Airlines
Sat 14/66:30 a.m.YYZ - ORD
1 stop18h 15mMultiple Airlines
Deal found 29/4C$ 363
Sat 7/68:10 a.m.ORD - YUL
Nonstop2h 20mAmerican Airlines
Sat 7/62:35 p.m.YUL - ORD
1 stop10h 22mAmerican Airlines
Deal found 29/4C$ 382
Wed 4/67:19 a.m.ORD - YUL
Nonstop2h 21mAir Canada
Tue 24/66:15 a.m.YUL - ORD
Nonstop2h 44mAir Canada
Deal found 28/4C$ 408
Wed 4/610:30 a.m.ORD - YYZ
1 stop6h 29mDelta
Thu 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 Chicago 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 April 2025.
Use the filters below to find and compare flights from Chicago to Ontario that are best for you.

Fly from

Chicago

Fly to

Ontario

Route

Depart

Return

Price

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 12/9

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

Nonstop1h 42m

Toronto Island

Sun 14/9

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

Nonstop1h 49m

C$ 233

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 12/6

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

Nonstop1h 40m

Toronto Island

Thu 19/6

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

Nonstop1h 50m

C$ 237

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 13/6

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

Nonstop1h 42m

Toronto Pearson Intl

Fri 20/6

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

Nonstop1h 54m

C$ 262

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sun 10/8

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

Nonstop1h 40m

Toronto Island

Fri 15/8

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

Nonstop1h 49m

C$ 270

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Thu 4/9

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

1 stop5h 05m

Toronto Island

Sun 7/9

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

1 stop5h 46m

C$ 277

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Tue 24/6

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

Nonstop1h 42m

Toronto Island

Fri 27/6

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

Nonstop1h 50m

C$ 325

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Sun 8/6

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

Nonstop1h 45m

Toronto Pearson Intl

Sun 15/6

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

Nonstop1h 55m

C$ 357

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 11/6

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

1 stop24h 24m

Toronto Pearson Intl

Sat 14/6

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

1 stop18h 15m

C$ 363

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Thu 29/5

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

1 stop6h 25m

Montreal Pierre Elliott Trudeau Intl

Sun 1/6

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

Nonstop2h 32m

C$ 370

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Tue 20/5

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

1 stop3h 55m

Montreal Pierre Elliott Trudeau Intl

Thu 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 Chicago to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Chicago 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 Chicago to Ontario

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

Currently, January is the cheapest month in which you can book a flight from Chicago to Region of Ontario (average of C$ 167). Flying from Chicago 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 CHI to ON?

Find hourly flight availability from Chicago 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 April 2025.

When flying from Chicago 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 Chicago to Region of Ontario

Explore weekly flight availability from Chicago 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 April 2025.

The most flights from CHI 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 April 2025.
Read through reviews of airlines operating flights from Chicago to Ontario, such as Porter Airlines, Delta and KLM. 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.
Porter Airlines
8.0
Very good
285 reviews
Check prices

Comfort

8.1

Food

7.6

Crew

8.8

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Porter Airlines
8.0
Very good
285 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Comfort

8.1

Food

7.6

Crew

8.8

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Delta
8.0
Very good
7,929 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Comfort

8.1

Food

7.6

Crew

8.8

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
KLM
7.8
Good
1,334 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Comfort

8.1

Food

7.6

Crew

8.8

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Air Transat
7.8
Good
385 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Comfort

8.1

Food

7.6

Crew

8.8

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
United Airlines
7.4
Good
8,696 reviews
Porter Airlines
8.0
Very good
285 reviews
Check prices

Comfort

8.1

Food

7.6

Crew

8.8

Overall

8.0

Entertainment

7.0

Boarding

8.2

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Related info for your journey

Find useful and relevant information for your journey from Chicago 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 Chicago to Region of Ontario one-way?

    To fly one-way, consider booking your trip with Air Transat, which is currently one of the cheapest options available, starting at C$ 134. Air Canada flights start at C$ 134 while deals on Porter Airlines start at C$ 143 one-way.

  • What are the most popular routes from Chicago to Region of Ontario?

    While some choose either Chicago O'Hare Intl - Toronto Pearson Intl or Chicago Midway - Toronto Pearson Intl, Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl is the most popular route from Chicago to Region of Ontario.

  • What are the most reliable airlines from Chicago to Region of Ontario?

    Before booking your flight to Region of Ontario from Chicago, check out the most reliable airlines to get you to your destination on time: Sun Country Air (100%), Finnair (100%), Korean Air( 86%).

  • What are the cheapest flights from Chicago to Region of Ontario?

    The cheapest flight price from Chicago to Region of Ontario is C$ 140. On average you can expect to pay C$ 269. The most popular route, (Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl), can usually be booked for C$ 336.

  • Can I find deals for flights from Chicago to Ontario that include hotel bookings?

    Yes. In addition to deals on Chicago to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Ontario.

  • Can I find deals for business class flights from Chicago to Ontario?

    Yes. Cheapflights offers flight deals from Chicago 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 Chicago to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from Chicago to Region of Ontario (average of C$ 167). Flying from Chicago 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 Chicago 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 Chicago to Ontario

Discover the top 3 airlines that operate flights from Chicago 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 April 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 Chicago to Ontario?

Deals for Chicago to Ontario flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

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 Chicago to Ontario.

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

Yes, we can. To see specific flights from Chicago to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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