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Cheap flights from Ontario to Chicago O'Hare Intl Airport from C$ 168

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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — ORD
20 Jan — 27 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to O'Hare Intl
Explore the most affordable flight options available from Ontario to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 December 2025.

Sun 28/126:45 p.m.YYZ - ORD
Nonstop2h 00mAir Canada
Sun 1/22:00 p.m.ORD - YYZ
Nonstop1h 39mAir Canada
Deal found 18/12C$ 453
Tue 30/129:00 p.m.YYZ - ORD
Nonstop2h 05mUnited Airlines
Mon 12/14:50 p.m.ORD - YYZ
Nonstop1h 55mUnited Airlines
Deal found 20/12C$ 487
Wed 31/1212:09 p.m.YYZ - ORD
1 stop6h 13mWestJet
Tue 13/16:50 a.m.ORD - YYZ
1 stop3h 30mWestJet
Deal found 20/12C$ 494
Sun 28/122:15 p.m.YYZ - ORD
Nonstop1h 55mAir Canada
Wed 4/27:15 a.m.ORD - YYZ
1 stop5h 25mAir Canada
Deal found 18/12C$ 499
Tue 30/129:00 a.m.YYZ - ORD
Nonstop2h 05mUnited Airlines
Tue 3/26:05 a.m.ORD - YYZ
1 stop4h 43mUnited Airlines
Deal found 18/12C$ 501
Mon 29/125:15 p.m.YYZ - ORD
1 stop4h 21mMultiple Airlines
Tue 13/17:20 a.m.ORD - YYZ
1 stop10h 42mMultiple Airlines
Deal found 20/12C$ 505
Tue 30/127:40 p.m.YYZ - ORD
1 stop5h 04mUnited Airlines
Fri 9/19:15 p.m.ORD - YYZ
Nonstop1h 44mUnited Airlines
Deal found 20/12C$ 508
Tue 30/129:00 a.m.YYZ - ORD
Nonstop2h 05mUnited Airlines
Mon 2/28:52 a.m.ORD - YYZ
1 stop4h 22mUnited Airlines
Deal found 18/12C$ 511
Tue 30/126:40 p.m.YYZ - ORD
1 stop5h 55mUnited Airlines
Mon 5/11:37 p.m.ORD - YYZ
1 stop6h 47mUnited Airlines
Deal found 20/12C$ 519
Sat 27/129:00 a.m.YYZ - ORD
Nonstop2h 05mAir Canada
Sun 1/28:00 a.m.ORD - YYZ
Nonstop1h 40mAir Canada
Deal found 18/12C$ 524
Tue 30/125:10 p.m.YUL - ORD
1 stop16h 21mMultiple Airlines
Sun 18/110:41 p.m.ORD - YUL
2 stops31h 24mMultiple Airlines
Deal found 19/12C$ 524
Mon 29/125:15 p.m.YYZ - ORD
1 stop4h 21mWestJet
Sun 11/16:50 a.m.ORD - YYZ
1 stop3h 30mWestJet
Deal found 20/12C$ 534

Find flight deals from Ontario to O'Hare Intl

Keep the following information in mind while searching for Ontario to O'Hare Intl flight deals. Data was last updated 21 December 2025.

Round-trip from

C$ 251

One-way from

C$ 168

Popular in

December

Cheapest in

July

Average price

C$ 443

Good round-trip deal

C$ 543 or less

Good one-way deal

C$ 289 or less
Air Canada
  • Air Canada
  • 4/2-11/2
  • Nonstop
  • 3h 37m total
  • Ontario to Chicago
Search Deals
American Airlines
  • American Airlines
  • 2/2
  • Nonstop
  • 2h 00m total
  • Ontario to Chicago
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 13 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 Ontario to Chicago O'Hare Intl.
Search Deals
Price to beat on a one-way flight from Ontario to Chicago O'Hare Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to O'Hare Intl 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 21 December 2025.
Use the filters below to find and compare flights from Ontario to Chicago O'Hare Intl Airport that are best for you.

Fly from

Ontario

Fly to

O'Hare Intl

Route

Depart

Return

Price

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Mon 2/2

7:30 a.m.-8:15 p.m.

1 stop13h 45m

Chicago O'Hare Intl

Sat 7/2

7:56 p.m.-1:45 p.m.

1 stop16h 49m

C$ 265

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 14/2

6:25 p.m.-8:10 p.m.

Nonstop2h 45m

Chicago O'Hare Intl

Mon 16/2

7:15 a.m.-10:20 a.m.

Nonstop2h 05m

C$ 270

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Tue 17/2

10:05 a.m.-1:20 p.m.

1 stop4h 15m

Chicago O'Hare Intl

Fri 27/2

6:30 a.m.-11:18 a.m.

1 stop3h 48m

C$ 293

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Fri 20/2

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

1 stop4h 29m

Chicago O'Hare Intl

Fri 27/2

6:30 a.m.-11:18 a.m.

1 stop3h 48m

C$ 293

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Sun 15/2

6:30 a.m.-11:45 a.m.

1 stop6h 15m

Chicago O'Hare Intl

Thu 26/2

6:30 a.m.-11:18 a.m.

1 stop3h 48m

C$ 293

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Sat 14/2

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

1 stop4h 29m

Chicago O'Hare Intl

Sun 22/2

6:15 a.m.-3:59 p.m.

1 stop8h 44m

C$ 293

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Wed 18/2

6:15 a.m.-9:41 a.m.

1 stop4h 26m

Chicago O'Hare Intl

Tue 24/2

2:05 p.m.-7:09 p.m.

1 stop4h 04m

C$ 293

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Mon 16/2

7:45 a.m.-1:20 p.m.

1 stop6h 35m

Chicago O'Hare Intl

Wed 25/2

10:35 a.m.-7:09 p.m.

1 stop7h 34m

C$ 293

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 19/2

5:10 p.m.-10:05 p.m.

1 stop5h 55m

Chicago O'Hare Intl

Thu 26/2

6:30 a.m.-11:18 a.m.

1 stop3h 48m

C$ 293

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Tue 17/2

10:05 a.m.-1:20 p.m.

1 stop4h 15m

Chicago O'Hare Intl

Sun 22/2

10:35 a.m.-4:10 p.m.

1 stop4h 35m

C$ 293

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/12

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

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

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

Currently, April is the cheapest month in which you can book a flight from Region of Ontario to Chicago O'Hare Intl Airport (average of C$ 113). Flying from Region of Ontario to Chicago O'Hare Intl Airport in July is currently the most expensive (average of C$ 266). 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 ON to ORD?

Find hourly flight availability from Ontario to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 December 2025.

It’s optimal to fly from Region of Ontario to Chicago O'Hare Intl Airport in the afternoon. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight in the evening.

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

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

Travelers seeking maximum savings on their Region of Ontario to Chicago O'Hare Intl Airport flight should consider departing on Sunday mornings 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 Region of Ontario to Chicago O'Hare Intl Airport

Explore weekly flight availability from Ontario to O'Hare Intl. 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 21 December 2025.

The most flights from CAON to ORD are scheduled on a Friday (61 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (34 on average).

Related info for your journey

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

    A quick flight from Region of Ontario to Chicago O'Hare Intl Airport can take about 2h 45m. American Airlines provides one of the quickest options available for as low as C$ 270. Region of Ontario and Chicago O'Hare Intl Airport are separated by a distance of 1199 km. Both multi-stop and direct flights can be found to your destination and back.

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

    C$ 128 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on United Airlines and Air Canada, with prices starting from C$ 161 and C$ 163, respectively.

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

    The most popular flight routes from Region of Ontario to Chicago O'Hare Intl Airport are Toronto Pearson Intl - Chicago O'Hare Intl, Montreal Pierre Elliott Trudeau Intl - Chicago O'Hare Intl and Ottawa - Chicago O'Hare Intl.

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

    No one likes to see their flight delayed. When booking a flight from Region of Ontario to Chicago O'Hare Intl Airport consider choosing EVA Air (83%), Japan Airlines (80%) or Egyptair (78%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay C$ 2,027 for a flight from Region of Ontario to Chicago O'Hare Intl Airport. The cheapest flight overall is C$ 146 while the most popular route, (Toronto Pearson Intl - Chicago O'Hare Intl) is currently priced at C$ 257.

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

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

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

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

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

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

    Currently, April is the cheapest month in which you can book a flight from Region of Ontario to Chicago O'Hare Intl Airport (average of C$ 113). Flying from Region of Ontario to Chicago O'Hare Intl Airport in July is currently the most expensive (average of C$ 266). 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

Travelling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Evanston
Des Plaines
Skokie
Elk Grove Village
Downers Grove
Racine
Naperville
Bolingbrook
Romeoville

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Alternative routes for Ontario to O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to O'Hare Intl flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Vancouver Intl to O'Hare Intl flights
Pearson Intl to Midway flights
Toronto Island to Midway flights
Pierre Elliott Trudeau Intl to Midway flights
Toronto Island to O'Hare Intl flights
Vancouver Intl to Midway flights
Ottawa to O'Hare Intl flights
Calgary to O'Hare Intl flights
Winnipeg to O'Hare Intl flights
Ottawa to Midway flights
Halifax to O'Hare Intl flights
Halifax to Midway flights
Québec City to O'Hare Intl flights
Calgary to Midway flights
Edmonton to O'Hare Intl flights
Victoria to O'Hare Intl flights
Hamilton to O'Hare Intl flights
Saskatoon to O'Hare Intl flights
Québec City to Midway flights
Edmonton to Midway flights
London to O'Hare Intl flights
Kelowna to O'Hare Intl flights
Regina to O'Hare Intl flights
Comox to O'Hare Intl flights
Victoria to Midway flights
Nanaimo to O'Hare Intl flights
Grande Prairie to Midway flights
Moncton to O'Hare Intl flights
Fort McMurray to O'Hare Intl flights
Saskatoon to Midway flights
Kelowna to Midway flights
St. John's to O'Hare Intl flights
Grande Prairie to O'Hare Intl flights
Sudbury to O'Hare Intl flights
St John to O'Hare Intl flights
Deer Lake to O'Hare Intl flights
Region of Waterloo Intl to O'Hare Intl flights
Kingston to O'Hare Intl flights

Top 5 airlines flying from Ontario to O'Hare Intl

Discover the top 5 airlines that operate flights from Ontario to O'Hare Intl. 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 21 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 222AverageC$ 275FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 257AverageC$ 468FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 259AverageC$ 422FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 263AverageC$ 539FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 368AverageC$ 492FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Ontario to O'Hare Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to O'Hare Intl from Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ontario to O'Hare Intl?

Cheapflights helps you find that perfect flight to O'Hare Intl from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Certainly. Search results for flights to O'Hare Intl from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes! Start tracking prices for Ontario to O'Hare Intl 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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