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Cheap flights from Chicago to Ontario from C$ 80

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 15/2. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
14 Jan — 21 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Chicago to Ontario

Enter your travel dates to find the best prices.

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 15 December 2025.

Mon 29/126:16 p.m.ORD - YYZ
Nonstop2h 05mUnited Airlines
Thu 1/19:00 a.m.YYZ - ORD
Nonstop2h 05mUnited Airlines
Deal found 12/12C$ 388
Wed 31/128:30 p.m.ORD - YUL
1 stop4h 23mAir Canada
Tue 6/111:10 a.m.YUL - ORD
1 stop5h 00mAir Canada
Deal found 13/12C$ 416
Mon 29/125:52 p.m.ORD - YUL
Nonstop2h 25mAir Canada
Mon 2/24:45 p.m.YUL - ORD
Nonstop3h 06mAir Canada
Deal found 15/12C$ 420
Mon 29/123:55 p.m.ORD - YYZ
Nonstop1h 39mUnited Airlines
Sat 3/15:30 p.m.YYZ - ORD
Nonstop2h 20mUnited Airlines
Deal found 13/12C$ 438
Mon 29/125:30 a.m.ORD - YUL
1 stop10h 45mDelta
Mon 2/26:02 p.m.YUL - ORD
1 stop6h 54mDelta
Deal found 15/12C$ 453
Tue 30/124:15 p.m.MDW - YUL
1 stop5h 30mPorter Airlines
Mon 5/111:25 a.m.YUL - MDW
1 stop4h 55mPorter Airlines
Deal found 15/12C$ 460
Sat 27/1211:00 a.m.MDW - YUL
1 stop4h 30mPorter Airlines
Fri 2/16:45 a.m.YUL - MDW
1 stop4h 25mPorter Airlines
Deal found 13/12C$ 461
Sat 20/124:15 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Mon 22/129:15 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 12/12C$ 482
Mon 29/1211:00 a.m.MDW - YUL
1 stop5h 45mPorter Airlines
Mon 2/26:45 a.m.YUL - MDW
1 stop4h 25mPorter Airlines
Deal found 15/12C$ 483
Sun 21/1211:00 a.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Mon 22/129:15 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 12/12C$ 486
Mon 29/124:15 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Mon 5/12:30 p.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 13/12C$ 487
Sat 20/124:15 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Tue 23/122:30 p.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 12/12C$ 492

Find flight deals from Chicago to Ontario

Keep the following information in mind while searching for Chicago to Ontario flight deals. Data was last updated 15 December 2025.

Round-trip from

C$ 253

One-way from

C$ 80

Popular in

January

Cheapest in

September

Average price

C$ 414

Good round-trip deal

C$ 280 or less

Good one-way deal

C$ 162 or less
Air Canada
  • Air Canada
  • 28/1-4/2
  • Nonstop
  • 3h 35m total
  • Chicago to Ontario
Search Deals
Porter Airlines
  • Porter Airlines
  • 15/2
  • 1 total stop
  • 4h 25m total
  • Chicago to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 68 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 December 2025
Search Deals
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.
Search Deals

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 15 December 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

Tue 20/1

11:05 a.m.-1:47 p.m.

Nonstop1h 42m

Toronto Island

Tue 27/1

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

Nonstop1h 50m

C$ 267

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 30/1

11:05 a.m.-1:47 p.m.

Nonstop1h 42m

Toronto Island

Sat 31/1

11:00 a.m.-11:50 a.m.

Nonstop1h 50m

C$ 274

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Sat 14/2

11:50 a.m.-3:09 p.m.

Nonstop2h 19m

Montreal Pierre Elliott Trudeau Intl

Sat 21/2

7:12 a.m.-12:10 a.m.

1 stop17h 58m

C$ 280

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 5/2

1:13 p.m.-4:02 p.m.

Nonstop1h 49m

Toronto Pearson Intl

Mon 9/2

11:00 a.m.-12:08 p.m.

Nonstop2h 08m

C$ 286

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Mon 26/1

1:13 p.m.-4:02 p.m.

Nonstop1h 49m

Toronto Pearson Intl

Mon 2/2

9:00 p.m.-10:05 p.m.

Nonstop2h 05m

C$ 291

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 30/1

9:15 p.m.-11:59 p.m.

Nonstop1h 44m

Toronto Pearson Intl

Mon 2/2

9:00 p.m.-10:05 p.m.

Nonstop2h 05m

C$ 291

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sun 8/2

11:00 a.m.-1:42 p.m.

Nonstop1h 42m

Toronto Island

Sat 14/2

11:00 a.m.-11:50 a.m.

Nonstop1h 50m

C$ 295

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 29/1

6:05 a.m.-11:48 a.m.

1 stop4h 43m

Toronto Pearson Intl

Sun 1/2

9:00 p.m.-10:05 p.m.

Nonstop2h 05m

C$ 303

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Wed 4/2

11:00 a.m.-5:45 p.m.

1 stop5h 45m

Montreal Pierre Elliott Trudeau Intl

Mon 9/2

6:45 a.m.-10:10 a.m.

1 stop4h 25m

C$ 317

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 15/1

11:05 a.m.-1:47 p.m.

Nonstop1h 42m

Toronto Island

Sun 18/1

9:15 a.m.-10:05 a.m.

Nonstop1h 50m

C$ 317

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/12

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, March is the cheapest month in which you can book a flight from Chicago to Region of Ontario (average of C$ 109). Flying from Chicago to Region of Ontario in December is currently the most expensive (average of C$ 291). 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 15 December 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 44% on flights from Chicago to Region of Ontario by exploring options for tickets in the evening.

What is the cheapest day to fly from Chicago to Region of Ontario?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Ontario. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Chicago to Region of Ontario flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 15 December 2025.

The most flights from CHI to CAON are scheduled on a Monday (64 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (19 on average).

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 15 December 2025.
Read reviews from past customers who have flown Porter Airlines,United Airlines, andAir Canada from Chicago to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
399 reviews
Check prices

Comfort

7.9

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
8.0
Very good
399 reviews
Porter Airlines
8.0
Very good
399 reviews
Check prices

Comfort

7.9

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,092 reviews
Porter Airlines
8.0
Very good
399 reviews
Check prices

Comfort

7.9

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,525 reviews
Porter Airlines
8.0
Very good
399 reviews
Check prices

Comfort

7.9

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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.

  • How long is the flight from Chicago to Region of Ontario?

    A quick flight from Chicago to Region of Ontario can take about 1h 42m. Porter Airlines provides one of the quickest options available for as low as C$ 267. Chicago and Region of Ontario are separated by a distance of 711 km. All flights are typically direct.

  • What are the cheapest airlines to fly from Chicago to Region of Ontario one-way?

    To fly one-way, consider booking your trip with Porter Airlines, which is currently one of the cheapest options available, starting at C$ 88. United Airlines flights start at C$ 95 while deals on American Airlines start at C$ 111 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 - Toronto Island, 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: Korean Air (94%), SkyWest Airlines (82%), Japan Airlines( 79%).

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

    The cheapest flight price from Chicago to Region of Ontario is C$ 88. On average you can expect to pay C$ 355. The most popular route, (Chicago O'Hare Intl - Toronto Pearson Intl), can usually be booked for C$ 244.

  • 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, March is the cheapest month in which you can book a flight from Chicago to Region of Ontario (average of C$ 109). Flying from Chicago to Region of Ontario in December is currently the most expensive (average of C$ 291). 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 15 December 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 150AverageC$ 463FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 203AverageC$ 355FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 259AverageC$ 354FlexibilityNo 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 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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