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Cheap flights from Chicago to Ontario from C$ 146

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
22 avr. — 29 avr.1
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 17 avril 2025.

Round-trip from

C$ 262

One-way from

C$ 146

Popular in

November

Cheapest in

July

Average price

C$ 464

Good round-trip deal

C$ 303 or less

Good one-way deal

C$ 129 or less
Porter Airlines
  • Porter Airlines
  • 8/5-11/5
  • Nonstop
  • 3h 31m total
  • Chicago to Ontario
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Air Canada
  • Air Canada
  • 7/5
  • 1 total stop
  • 7h 10m total
  • Chicago to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 24 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).
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.
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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 17 avril 2025.

jeu. 8/55:20 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
dim. 11/54:05 p.m.YTZ - MDW
Nonstop1h 49mPorter Airlines
Deal found 17/4C$ 262
dim. 1/68:25 p.m.ORD - YYZ
Nonstop1h 42mAir Canada
dim. 8/66:15 a.m.YYZ - ORD
1 stop4h 37mAir Canada
Deal found 17/4C$ 291
dim. 11/55:50 p.m.MDW - YTZ
Nonstop1h 42mMultiple Airlines
mer. 14/54:05 p.m.YTZ - MDW
Nonstop1h 49mMultiple Airlines
Deal found 16/4C$ 301
mar. 6/58:40 a.m.ORD - YTZ
1 stop5h 10mAir Canada
mar. 13/58:50 a.m.YTZ - ORD
1 stop4h 13mAir Canada
Deal found 16/4C$ 302
mar. 13/510:45 a.m.ORD - YYZ
Nonstop1h 57mMultiple Airlines
mar. 13/54:00 p.m.YYZ - ORD
1 stop5h 12mMultiple Airlines
Deal found 16/4C$ 313
mer. 14/56:00 a.m.ORD - YYZ
1 stop7h 19mUnited Airlines
mer. 14/54:30 p.m.YYZ - ORD
Nonstop1h 54mUnited Airlines
Deal found 17/4C$ 320
dim. 22/69:40 a.m.MDW - YUL
1 stop5h 20mPorter Airlines
jeu. 26/610:45 a.m.YUL - MDW
1 stop6h 39mPorter Airlines
Deal found 17/4C$ 327
mar. 27/57:19 a.m.ORD - YUL
Nonstop2h 21mAir Canada
mer. 28/51:00 p.m.YUL - ORD
1 stop6h 53mAir Canada
Deal found 17/4C$ 327
mer. 7/56:37 p.m.ORD - YUL
1 stop14h 13mAmerican Airlines
jeu. 8/512:30 p.m.YUL - ORD
Nonstop2h 35mAmerican Airlines
Deal found 16/4C$ 352
jeu. 8/57:10 a.m.ORD - YYZ
1 stop5h 37mLufthansa
dim. 11/59:00 a.m.YYZ - ORD
Nonstop2h 01mLufthansa
Deal found 17/4C$ 356
mer. 30/45:35 p.m.MDW - YOW
1 stop3h 54mPorter Airlines
jeu. 8/512:35 p.m.YOW - MDW
1 stop4h 49mPorter Airlines
Deal found 16/4C$ 359
ven. 15/85:20 p.m.MDW - YTZ
Nonstop1h 42mAir Transat
lun. 18/83:35 p.m.YTZ - MDW
Nonstop1h 49mAir Transat
Deal found 16/4C$ 367

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 17 avril 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

jeu. 8/5

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

Nonstop1h 42m

Toronto Island

dim. 11/5

4:05 p.m.-4:54 p.m.

Nonstop1h 49m

C$ 262

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

dim. 1/6

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

Nonstop1h 42m

Toronto Pearson Intl

dim. 8/6

6:15 a.m.-9:52 a.m.

1 stop4h 37m

C$ 291

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

dim. 11/5

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

Nonstop1h 42m

Toronto Island

mar. 20/5

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

Nonstop1h 49m

C$ 298

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

mar. 6/5

8:40 a.m.-2:50 p.m.

1 stop5h 10m

Toronto Island

mar. 13/5

8:50 a.m.-12:03 p.m.

1 stop4h 13m

C$ 302

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

mar. 13/5

10:45 a.m.-1:42 p.m.

Nonstop1h 57m

Toronto Pearson Intl

mar. 13/5

4:00 p.m.-8:12 p.m.

1 stop5h 12m

C$ 313

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

mer. 14/5

6:00 a.m.-2:19 p.m.

1 stop7h 19m

Toronto Pearson Intl

mer. 14/5

4:30 p.m.-5:24 p.m.

Nonstop1h 54m

C$ 320

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

dim. 22/6

9:40 a.m.-4:00 p.m.

1 stop5h 20m

Montreal Pierre Elliott Trudeau Intl

jeu. 26/6

10:45 a.m.-4:24 p.m.

1 stop6h 39m

C$ 327

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

mar. 27/5

7:19 a.m.-10:40 a.m.

Nonstop2h 21m

Montreal Pierre Elliott Trudeau Intl

mer. 28/5

6:40 p.m.-8:12 p.m.

Nonstop2h 32m

C$ 327

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

mer. 7/5

6:37 p.m.-9:50 a.m.

1 stop14h 13m

Montreal Pierre Elliott Trudeau Intl

jeu. 8/5

12:30 p.m.-2:05 p.m.

Nonstop2h 35m

C$ 352

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

jeu. 8/5

7:10 a.m.-1:47 p.m.

1 stop5h 37m

Toronto Pearson Intl

dim. 11/5

9:00 a.m.-10:01 a.m.

Nonstop2h 01m

C$ 356

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/4

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 17 avril 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 17 avril 2025.

The most flights from CHI to CAON are scheduled on a Thursday (57 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (46 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 17 avril 2025.
Read through reviews of airlines operating flights from Chicago 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
1,447 reviews
Check prices

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.
Japan Airlines
8.3
Very good
1,447 reviews
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.
Porter Airlines
8.0
Very good
281 reviews
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.
Delta
8.0
Very good
7,917 reviews
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.
Air Transat
7.8
Good
385 reviews
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.
United Airlines
7.4
Good
8,667 reviews
Japan Airlines
8.3
Very good
1,447 reviews
Check prices

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Food

7.7

Crew

8.7

Overall

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2024

HKG - NRT

Online check in and seat selection was tricky. Also I received some emails from Japan Airlines in Japanese with no English selection which worried me. I still don’t know what they said. The service at check in and onboard was very courteous and polite, and staff was helpful.

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 Canada, which is currently one of the cheapest options available, starting at C$ 146. Delta flights start at C$ 147 while deals on Porter Airlines start at C$ 148 one-way.

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

    While some choose either Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl or Chicago Midway - Montreal Pierre Elliott Trudeau Intl, Chicago O'Hare Intl - Toronto Pearson 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$ 138. On average you can expect to pay C$ 354. The most popular route, (Chicago O'Hare Intl - Toronto Pearson Intl), can usually be booked for C$ 312.

  • 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 17 avril 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 183AverageC$ 481FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 202AverageC$ 461FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 340AverageC$ 422FlexibilityNo cancel feeOn-time52%
Search Porter 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 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.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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