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Cheap flights from Chicago O'Hare Intl Airport to Ontario from C$ 77

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from O'Hare Intl to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from O'Hare Intl to Ontario
Explore the most affordable flight options available from O'Hare Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 December 2025.

Thu 25/122:30 p.m.ORD - YYZ
1 stop8h 16mUnited Airlines
Fri 26/126:50 a.m.YYZ - ORD
Nonstop2h 13mUnited Airlines
Deal found 10/12C$ 349
Thu 25/126:21 p.m.ORD - YYZ
1 stop4h 25mUnited Airlines
Mon 5/110:00 a.m.YYZ - ORD
1 stop14h 44mUnited Airlines
Deal found 10/12C$ 370
Thu 25/126:21 p.m.ORD - YYZ
1 stop4h 25mUnited Airlines
Mon 29/129:00 a.m.YYZ - ORD
Nonstop2h 05mUnited Airlines
Deal found 11/12C$ 376
Wed 24/128:30 p.m.ORD - YUL
1 stop4h 23mAir Canada
Sat 27/127:00 a.m.YUL - ORD
1 stop13h 45mAir Canada
Deal found 9/12C$ 412
Wed 31/122:00 p.m.ORD - YUL
1 stop4h 22mAir Canada
Tue 6/111:10 a.m.YUL - ORD
1 stop5h 00mAir Canada
Deal found 11/12C$ 416
Thu 25/1210:00 a.m.ORD - YUL
1 stop4h 23mAir Canada
Wed 31/128:50 a.m.YUL - ORD
2 stops7h 20mAir Canada
Deal found 11/12C$ 423
Thu 25/126:21 p.m.ORD - YYZ
1 stop4h 25mUnited Airlines
Wed 31/1212:10 p.m.YYZ - ORD
1 stop7h 43mUnited Airlines
Deal found 9/12C$ 459
Thu 25/127:00 a.m.ORD - YUL
1 stop4h 46mUnited Airlines
Sun 28/125:25 p.m.YUL - ORD
1 stop17h 19mUnited Airlines
Deal found 9/12C$ 492
Thu 25/129:34 a.m.ORD - YOW
1 stop26h 01mMultiple Airlines
Thu 8/17:00 a.m.YOW - ORD
1 stop14h 30mMultiple Airlines
Deal found 10/12C$ 495
Wed 24/126:40 a.m.ORD - YTZ
2 stops33h 08mMultiple Airlines
Wed 31/126:45 a.m.YTZ - ORD
1 stop16h 22mMultiple Airlines
Deal found 10/12C$ 495
Sun 28/128:30 p.m.ORD - YUL
1 stop4h 23mAir Canada
Mon 12/16:25 p.m.YUL - ORD
Nonstop2h 45mAir Canada
Deal found 10/12C$ 503
Thu 25/126:21 p.m.ORD - YYZ
1 stop4h 25mUnited Airlines
Thu 1/15:30 p.m.YYZ - ORD
Nonstop2h 20mUnited Airlines
Deal found 9/12C$ 508

Find flight deals from O'Hare Intl to Ontario

Keep the following information in mind while searching for O'Hare Intl to Ontario flight deals. Data was last updated 12 December 2025.

Round-trip from

C$ 254

One-way from

C$ 77

Popular in

February

Cheapest in

September

Average price

C$ 405

Good round-trip deal

C$ 333 or less

Good one-way deal

C$ 149 or less
Air Canada
  • Air Canada
  • 25/1-1/2
  • Nonstop
  • 3h 36m total
  • Chicago to Ontario
Search Deals
Air Canada
  • Air Canada
  • 9/2
  • Nonstop
  • 2h 05m total
  • Chicago to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 58 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 December 2025
Search Deals
Price to beat on a round-trip flight from Chicago O'Hare Intl to Ontario.
Search Deals
Price to beat on a one-way flight from Chicago O'Hare Intl to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl 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 12 December 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Ontario that are best for you.

Fly from

O'Hare Intl

Fly to

Ontario

Route

Depart

Return

Price

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Mon 26/1

6:28 p.m.-9:21 p.m.

Nonstop1h 53m

Toronto Pearson Intl

Mon 2/2

3:30 p.m.-4:40 p.m.

Nonstop2h 10m

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

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Sat 24/1

3:35 p.m.-9:35 p.m.

1 stop5h 00m

Toronto Island

Sat 31/1

3:30 p.m.-8:10 p.m.

1 stop5h 40m

C$ 294

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 21/1

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

1 stop4h 43m

Toronto Pearson Intl

Wed 21/1

3:30 p.m.-4:40 p.m.

Nonstop2h 10m

C$ 316

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 13/2

7:00 a.m.-5:18 p.m.

1 stop9h 18m

Toronto Pearson Intl

Sun 15/2

5:15 p.m.-8:44 p.m.

1 stop4h 29m

C$ 321

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Thu 5/2

6:15 a.m.-1:42 p.m.

1 stop6h 27m

Montreal Pierre Elliott Trudeau Intl

Sun 8/2

6:00 a.m.-9:41 a.m.

1 stop4h 41m

C$ 325

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Fri 20/2

6:30 a.m.-3:55 p.m.

1 stop8h 25m

Montreal Pierre Elliott Trudeau Intl

Mon 23/2

7:00 a.m.-4:50 p.m.

1 stop10h 50m

C$ 325

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Thu 12/2

6:45 a.m.-4:53 p.m.

1 stop9h 08m

Montreal Pierre Elliott Trudeau Intl

Sun 15/2

6:00 a.m.-9:41 a.m.

1 stop4h 41m

C$ 327

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Sat 14/2

2:03 p.m.-11:10 p.m.

1 stop8h 07m

Montreal Pierre Elliott Trudeau Intl

Sat 21/2

6:00 a.m.-9:41 a.m.

1 stop4h 41m

C$ 327

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Thu 19/2

10:35 a.m.-3:55 p.m.

1 stop4h 20m

Montreal Pierre Elliott Trudeau Intl

Mon 23/2

6:00 p.m.-11:57 p.m.

1 stop6h 57m

C$ 327

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 60 results
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Best time to book a flight from O'Hare Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from O'Hare Intl 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 O'Hare Intl Airport to Ontario

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Region of Ontario?

Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Region of Ontario (average of C$ 117). Flying from Chicago O'Hare Intl Airport to Region of Ontario in December is currently the most expensive (average of C$ 290). 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 ORD to ON?

Find hourly flight availability from O'Hare Intl 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 12 December 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to Region of Ontario in the evening. Doing so could potentially save you 49% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to Region of Ontario?

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

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

Weekly flight availability from Chicago O'Hare Intl Airport to Region of Ontario

Explore weekly flight availability from O'Hare Intl 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 12 December 2025.

The most flights from ORD to CAON are scheduled on a Monday (64 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 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 12 December 2025.
See what other customers who have flown with United Airlines,American Airlines, andAir Canada from Chicago O'Hare Intl Airport to Ontario have to say. 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.
United Airlines
7.4
Good
9,095 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,095 reviews
United Airlines
7.4
Good
9,095 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
American Airlines
7.2
Good
11,048 reviews
United Airlines
7.4
Good
9,095 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Air Canada
7.1
Good
10,514 reviews
United Airlines
7.4
Good
9,095 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl 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 O'Hare Intl Airport to Region of Ontario?

    Departing from Chicago O'Hare Intl Airport to Region of Ontario will take you 1h 53m. Airlines will cover a distance of 702 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to Region of Ontario one-way?

    C$ 95 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Air Canada, with prices starting from C$ 111 and C$ 141, respectively.

  • What are the most popular routes from Chicago O'Hare Intl Airport to Region of Ontario?

    When deciding which route to take from Chicago O'Hare Intl Airport to Region of Ontario consider Chicago O'Hare Intl - Toronto Pearson Intl, Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl or Chicago O'Hare Intl - Toronto Island as they are the most popular.

  • What are the most reliable airlines from Chicago O'Hare Intl Airport to Region of Ontario?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago O'Hare Intl Airport to Region of Ontario on time: Korean Air (94%), SkyWest Airlines (82%), Japan Airlines (79%).

  • What are the cheapest flights from Chicago O'Hare Intl Airport to Region of Ontario?

    While on average a flight from Chicago O'Hare Intl Airport to Region of Ontario is generally C$ 343, our data shows the cheapest flight currently is C$ 88. When looking at the most popular route, (Chicago O'Hare Intl - Toronto Pearson Intl), you can expect to pay C$ 230 for that flight.

  • Can I find deals for flights from O'Hare Intl to Ontario that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to Ontario?

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

  • Can I find deals for business class flights from O'Hare Intl to Ontario?

    Yes. Cheapflights offers flight deals from O'Hare Intl 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 O'Hare Intl Airport to Region of Ontario?

    Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Region of Ontario (average of C$ 117). Flying from Chicago O'Hare Intl Airport to Region of Ontario in December is currently the most expensive (average of C$ 290). 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 O'Hare Intl to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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O'Hare Intl to Prince George flights

Top 3 airlines flying from O'Hare Intl to Ontario

Discover the top 3 airlines that operate flights from O'Hare Intl 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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 150AverageC$ 464FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 203AverageC$ 356FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 260AverageC$ 359FlexibilityNo 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 O'Hare Intl to Ontario?

Deals for O'Hare Intl 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 O'Hare Intl to Ontario?

Millions of users choose and trust Cheapflights to book the best flight deals from O'Hare Intl to Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from O'Hare Intl to Ontario with no change fees?

Yes! Cheapflights helps users easily find flights from O'Hare Intl to Ontario with no change fees.

Can Cheapflights notify me if prices for flights from O'Hare Intl to Ontario become cheaper?

Yes! Start tracking prices for O'Hare Intl to Ontario flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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