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$103+ Cheap flights from Chicago (CHI) to Ontario

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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — YYZ
avr. 2 — avr. 91
mer. 4/2
mer. 4/9
1 adult, Economy
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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 mars 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$218
(Trip.com)

One-way from

$103
(Trip.com)

Popular in

March

Cheapest in

April

Average price

$400

Good round-trip deal

$224 or less

Good one-way deal

$139 or less
Provider with most accurate pricing for Chicago (CHI)-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Toronto (YTO) flights.
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From Chicago (CHI) to Ontario
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One-way flight from Chicago (CHI) to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($19 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 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 mars 28, 2025.

This Mytrip deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 5/148:40 amORD - YTZ
2 stops8h 57mAir Canada
ven. 5/2310:20 amYTZ - ORD
2 stops10h 52mAir Canada
Deal found 3/26$204
This Trip.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 4/2411:15 amMDW - YTZ
Nonstop1h 42mPorter Airlines
jeu. 5/17:55 amYTZ - MDW
Nonstop1h 50mPorter Airlines
Deal found 3/27$220
This Flightnetwork deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dim. 5/116:30 pmORD - YYZ
Nonstop1h 46mAir Canada
dim. 5/186:35 pmYYZ - ORD
Nonstop1h 55mAir Canada
Deal found 3/27$227
This Flightnetwork deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 4/1811:15 amMDW - YUL
1 stop4h 32mPorter Airlines
lun. 4/216:50 amYUL - MDW
1 stop4h 30mPorter Airlines
Deal found 3/27$233
This Flightnetwork deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 5/39:40 amMDW - YTZ
Nonstop1h 42mMultiple Airlines
sam. 5/107:55 amYTZ - MDW
Nonstop1h 50mMultiple Airlines
Deal found 3/27$234
This Mytrip deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/66:05 pmORD - YUL
Nonstop2h 24mAir Canada
mar. 5/271:00 pmYUL - ORD
1 stop6h 53mAir Canada
Deal found 3/27$242
This Mytrip deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/125:20 pmORD - YYZ
1 stop26h 48mMultiple Airlines
lun. 5/198:20 amYYZ - ORD
1 stop9h 05mMultiple Airlines
Deal found 3/28$251
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/136:24 amORD - YYZ
1 stop4h 16mDelta
mer. 5/216:30 amYYZ - ORD
1 stop7h 11mDelta
Deal found 3/26$255
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 5/19:20 amMDW - YYZ
1 stop4h 49mDelta
mar. 5/279:49 amYYZ - MDW
1 stop3h 39mDelta
Deal found 3/26$255
This Cheapflightsfares deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 4/2511:15 amMDW - YTZ
Nonstop1h 42mAir Transat
lun. 4/289:30 amYTZ - MDW
Nonstop1h 50mAir Transat
Deal found 3/27$263
This United Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 9/67:10 amORD - YYZ
1 stop5h 33mUnited Airlines
sam. 9/65:15 pmYYZ - ORD
Nonstop1h 57mUnited Airlines
Deal found 3/27$269
This Mytrip deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 4/235:55 amORD - YTZ
1 stop13h 10mMultiple Airlines
mer. 4/307:45 amYTZ - ORD
1 stop11h 32mMultiple Airlines
Deal found 3/26$284

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 2,558,603 searches. Data last updated mars 28, 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

mer. 5/14

8:40 am-6:37 pm

2 stops8h 57m

Toronto Island

ven. 5/23

10:20 am-8:12 pm

2 stops10h 52m

$204

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

jeu. 4/24

11:15 am-1:57 pm

Nonstop1h 42m

Toronto Island

jeu. 5/1

7:55 am-8:45 am

Nonstop1h 50m

$220

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

dim. 5/11

6:30 pm-9:16 pm

Nonstop1h 46m

Toronto Pearson Intl

dim. 5/18

6:35 pm-7:30 pm

Nonstop1h 55m

$227

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

ven. 4/18

11:15 am-4:47 pm

1 stop4h 32m

Montreal Pierre Elliott Trudeau Intl

lun. 4/21

6:50 am-10:20 am

1 stop4h 30m

$233

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

sam. 5/3

9:40 am-12:22 pm

Nonstop1h 42m

Toronto Island

sam. 5/10

7:55 am-8:45 am

Nonstop1h 50m

$234

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

mar. 5/6

6:05 pm-9:29 pm

Nonstop2h 24m

Montreal Pierre Elliott Trudeau Intl

mar. 5/27

1:00 pm-6:53 pm

1 stop6h 53m

$242

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

lun. 5/12

5:20 pm-9:08 pm

1 stop26h 48m

Toronto Pearson Intl

lun. 5/19

8:20 am-4:25 pm

1 stop9h 05m

$251

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

mar. 5/13

6:24 am-11:40 am

1 stop4h 16m

Toronto Pearson Intl

mer. 5/21

6:30 am-12:41 pm

1 stop7h 11m

$255

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

jeu. 5/1

9:20 am-3:09 pm

1 stop4h 49m

Toronto Pearson Intl

mar. 5/27

9:49 am-12:28 pm

1 stop3h 39m

$255

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

ven. 4/25

11:15 am-1:57 pm

Nonstop1h 42m

Toronto Island

lun. 4/28

9:30 am-10:20 am

Nonstop1h 50m

$263

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

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 $243). Flying from Chicago to Region of Ontario in July is currently the most expensive (average of $359). 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 mars 28, 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 mars 28, 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 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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 mars 28, 2025.
Read through reviews of airlines operating flights from Chicago to Ontario, such as Delta, Porter Airlines and Air Transat. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

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 $103. Air Canada flights start at $104 while deals on Air Transat start at $116 one-way.

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

    Most travelers choose Chicago O'Hare Intl - Toronto Pearson Intl, Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl or Chicago Midway - Toronto Island when deciding on the best route from Chicago to Region of Ontario.

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

    Consider Sun Country Air (100%), Korean Air (83%) or Air New Zealand (80%) when booking your flight. These represent the most reliable airlines when flying from Chicago to Region of Ontario.

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

    Looking at all options, your cheapest flight can be booked for $111. While the most popular route (Chicago O'Hare Intl - Toronto Pearson Intl) can be booked for $236 on average our data indicates $1,514 when flying from Chicago to Region of Ontario.

  • 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 $243). Flying from Chicago to Region of Ontario in July is currently the most expensive (average of $359). 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 4 airlines flying from Chicago to Ontario

Discover the top 4 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 2,558,603 searches. Data last updated mars 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$122Average$340FlexibilityNo cancel feeOn-time52%
American AirlinesCheapest$122Average$354FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$122Average$540FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$157Average$532FlexibilityNo cancel feeOn-time69%
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