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Cheap flights from Chicago to Ontario from C$ 147

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 26/4. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
2 Apr — 9 Apr1
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 28 March 2025.

Round-trip from

C$ 292

One-way from

C$ 147

Popular in

March

Cheapest in

April

Average price

C$ 572

Good round-trip deal

C$ 313 or less

Good one-way deal

C$ 174 or less
Air Canada
  • Air Canada
  • 14/5-23/5
  • 4 total stops
  • 19h 49m total
  • Chicago to Ontario
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15/4
  • 15/4
  • 1 total stop
  • 22h 58m total
  • Chicago to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 37 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 18 potential savings vs. average RT price).
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Average for round-trip flights in March 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 28 March 2025.

Wed 14/58:40 a.m.ORD - YTZ
2 stops8h 57mAir Canada
Fri 23/510:20 a.m.YTZ - ORD
2 stops10h 52mAir Canada
Deal found 26/3C$ 292
Sat 19/412:55 p.m.MDW - YTZ
Nonstop1h 42mPorter Airlines
Mon 21/49:30 a.m.YTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 25/3C$ 312
Sat 10/58:40 a.m.ORD - YYZ
1 stop5h 54mAir Canada
Sat 17/56:15 a.m.YYZ - ORD
1 stop4h 37mAir Canada
Deal found 26/3C$ 320
Fri 18/411:15 a.m.MDW - YUL
1 stop4h 32mPorter Airlines
Mon 21/46:50 a.m.YUL - MDW
1 stop4h 30mPorter Airlines
Deal found 27/3C$ 333
Sat 3/59:40 a.m.MDW - YTZ
Nonstop1h 42mMultiple Airlines
Sat 10/57:55 a.m.YTZ - MDW
Nonstop1h 50mMultiple Airlines
Deal found 27/3C$ 334
Tue 6/58:40 a.m.ORD - YUL
Nonstop2h 15mAir Canada
Tue 27/58:20 a.m.YUL - ORD
Nonstop2h 32mAir Canada
Deal found 26/3C$ 350
Thu 3/47:21 p.m.ORD - YYZ
1 stop27h 34mMultiple Airlines
Tue 8/47:05 a.m.YYZ - ORD
1 stop27h 19mMultiple Airlines
Deal found 26/3C$ 360
Tue 29/410:30 a.m.ORD - YYZ
1 stop5h 48mDelta
Wed 28/512:15 p.m.YYZ - ORD
1 stop5h 15mDelta
Deal found 26/3C$ 364
Tue 13/59:20 a.m.MDW - YYZ
1 stop8h 11mDelta
Wed 11/63:31 p.m.YYZ - MDW
1 stop4h 14mDelta
Deal found 26/3C$ 364
Fri 13/65:50 p.m.MDW - YTZ
Nonstop1h 42mAir Transat
Tue 17/67:55 a.m.YTZ - MDW
Nonstop1h 50mAir Transat
Deal found 26/3C$ 367
Fri 2/58:50 a.m.ORD - YYZ
1 stop4h 29mUnited Airlines
Fri 2/54:30 p.m.YYZ - ORD
Nonstop1h 54mUnited Airlines
Deal found 26/3C$ 384
Wed 23/48:30 p.m.ORD - YUL
1 stop12h 20mAmerican Airlines
Thu 24/412:30 p.m.YUL - ORD
Nonstop2h 35mAmerican Airlines
Deal found 25/3C$ 386

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 28 March 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

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Wed 14/5

8:40 a.m.-6:37 p.m.

2 stops8h 57m

Toronto Island

Fri 23/5

10:20 a.m.-8:12 p.m.

2 stops10h 52m

C$ 292

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sat 19/4

12:55 p.m.-3:37 p.m.

Nonstop1h 42m

Toronto Island

Mon 21/4

9:30 a.m.-10:20 a.m.

Nonstop1h 50m

C$ 312

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Sat 10/5

8:40 a.m.-3:34 p.m.

1 stop5h 54m

Toronto Pearson Intl

Sat 17/5

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

1 stop4h 37m

C$ 320

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Fri 18/4

11:15 a.m.-4:47 p.m.

1 stop4h 32m

Montreal Pierre Elliott Trudeau Intl

Mon 21/4

6:50 a.m.-10:20 a.m.

1 stop4h 30m

C$ 333

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sat 3/5

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

Nonstop1h 42m

Toronto Island

Sat 10/5

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

Nonstop1h 50m

C$ 334

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Tue 6/5

8:40 a.m.-11:55 a.m.

Nonstop2h 15m

Montreal Pierre Elliott Trudeau Intl

Tue 27/5

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

Nonstop2h 32m

C$ 350

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 3/4

7:21 p.m.-11:55 p.m.

1 stop27h 34m

Toronto Pearson Intl

Tue 8/4

7:05 a.m.-9:24 a.m.

1 stop27h 19m

C$ 360

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 29/4

6:45 a.m.-3:09 p.m.

1 stop7h 24m

Toronto Pearson Intl

Thu 1/5

3:59 p.m.-8:45 p.m.

1 stop5h 46m

C$ 364

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Tue 13/5

9:20 a.m.-6:31 p.m.

1 stop8h 11m

Toronto Pearson Intl

Wed 11/6

3:31 p.m.-6:45 p.m.

1 stop4h 14m

C$ 364

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 13/6

5:50 p.m.-8:32 p.m.

Nonstop1h 42m

Toronto Island

Tue 17/6

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

Nonstop1h 50m

C$ 367

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/3

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 28 March 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 28 March 2025.

The most flights from CHI to CAON are scheduled on a Friday (55 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 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 28 March 2025.
Read through reviews of airlines operating flights from Chicago to Ontario, such as Delta, Porter Airlines and Air Transat. 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.
Delta
8.0
Very good
7,896 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,896 reviews
Delta
8.0
Very good
7,896 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Porter Airlines
7.9
Good
276 reviews
Delta
8.0
Very good
7,896 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Transat
7.8
Good
381 reviews
Delta
8.0
Very good
7,896 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aeromexico
7.5
Good
1,701 reviews
Delta
8.0
Very good
7,896 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,603 reviews
Delta
8.0
Very good
7,896 reviews
Check prices

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 Porter Airlines, which is currently one of the cheapest options available, starting at C$ 149. Air Canada flights start at C$ 149 while deals on Air Transat start at C$ 166 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 Pearson 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%), Korean Air (83%), Air New Zealand( 80%).

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

    The cheapest flight price from Chicago to Region of Ontario is C$ 142. On average you can expect to pay C$ 449. The most popular route, (Chicago O'Hare Intl - Toronto Pearson Intl), can usually be booked for C$ 334.

  • 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 2 airlines flying from Chicago to Ontario

Discover the top 2 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 28 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 195AverageC$ 501FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 208AverageC$ 489FlexibilityNo 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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