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Cheap flights from Ontario to Chicago O'Hare Intl Airport from C$ 137

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 23/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — ORD
6 Mar — 13 Mar1
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 4 February 2026.

Mon 23/26:25 p.m.
YUL
-
ORD
Nonstop2h 45m
Air Canada
Wed 25/212:50 p.m.
ORD
-
YUL
Nonstop2h 11m
Air Canada
Deal found 2/2C$ 242
Tue 24/26:25 p.m.
YUL
-
ORD
Nonstop2h 45m
Air Canada
Wed 4/33:35 p.m.
ORD
-
YUL
Nonstop2h 05m
Air Canada
Deal found 2/2C$ 243
Thu 26/36:00 a.m.
YUL
-
ORD
Nonstop3h 00m
United Airlines
Mon 30/31:00 p.m.
ORD
-
YUL
1 stop10h 13m
United Airlines
Deal found 4/2C$ 254
Tue 10/34:45 p.m.
YUL
-
ORD
Nonstop3h 00m
United Airlines
Tue 31/36:01 p.m.
ORD
-
YUL
1 stop5h 12m
United Airlines
Deal found 3/2C$ 255
Thu 4/69:30 a.m.
YUL
-
ORD
1 stop14h 51m
United Airlines
Sun 7/66:12 p.m.
ORD
-
YUL
Nonstop2h 22m
United Airlines
Deal found 4/2C$ 262
Thu 26/28:15 a.m.
YYZ
-
ORD
Nonstop1h 58m
Air Canada
Sun 1/33:55 p.m.
ORD
-
YYZ
Nonstop1h 39m
Air Canada
Deal found 4/2C$ 264
Thu 19/34:50 p.m.
YYZ
-
ORD
Nonstop1h 58m
Air Canada
Thu 26/31:55 p.m.
ORD
-
YYZ
Nonstop1h 39m
Air Canada
Deal found 2/2C$ 266
Tue 24/26:40 p.m.
YYZ
-
ORD
Nonstop2h 05m
Air Canada
Mon 9/38:00 a.m.
ORD
-
YYZ
Nonstop1h 40m
Air Canada
Deal found 2/2C$ 269
Sat 28/38:15 a.m.
YYZ
-
ORD
Nonstop1h 58m
Air Canada
Mon 6/44:15 p.m.
ORD
-
YYZ
Nonstop1h 42m
Air Canada
Deal found 3/2C$ 273
Wed 25/29:00 p.m.
YYZ
-
ORD
Nonstop2h 04m
United Airlines
Wed 4/37:07 a.m.
ORD
-
YYZ
Nonstop1h 51m
United Airlines
Deal found 4/2C$ 274
Thu 26/22:15 p.m.
YYZ
-
ORD
Nonstop1h 55m
Air Canada
Thu 5/310:00 a.m.
ORD
-
YYZ
Nonstop1h 40m
Air Canada
Deal found 1/2C$ 276
Thu 26/28:45 a.m.
YYZ
-
ORD
Nonstop2h 05m
Lufthansa
Sun 1/36:28 p.m.
ORD
-
YYZ
Nonstop1h 53m
Lufthansa
Deal found 2/2C$ 279

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 4 February 2026.

Round-trip from

C$ 242

One-way from

C$ 137

Popular in

January

Cheapest in

July

Average price

C$ 371

Good round-trip deal

C$ 442 or less

Good one-way deal

C$ 282 or less
Air Canada
  • Air Canada
  • 23/2-25/2
  • Nonstop
  • 4h 56m total
  • Ontario to Chicago
Search Deals
Air Canada
  • Air Canada
  • 23/4
  • Nonstop
  • 2h 35m total
  • Ontario to Chicago
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 57 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 February 2026
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.
Search Deals

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 4 February 2026.
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

Tue 10/3

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

Nonstop3h 00m

Chicago O'Hare Intl

Tue 31/3

6:01 p.m.-12:13 a.m.

1 stop5h 12m

C$ 255

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Sat 28/3

8:45 a.m.-9:50 a.m.

Nonstop2h 05m

Chicago O'Hare Intl

Sat 4/4

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

Nonstop1h 44m

C$ 276

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 11/3

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Mon 16/3

1:06 p.m.-7:48 p.m.

1 stop5h 42m

C$ 281

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 20/3

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Wed 25/3

7:10 a.m.-1:28 p.m.

1 stop5h 18m

C$ 281

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 21/3

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Sat 28/3

6:00 p.m.-9:17 p.m.

Nonstop2h 17m

C$ 281

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 12/3

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Sun 15/3

6:00 a.m.-3:16 p.m.

1 stop8h 16m

C$ 281

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 25/3

6:00 a.m.-8:00 a.m.

Nonstop3h 00m

Chicago O'Hare Intl

Sun 29/3

6:01 p.m.-9:26 p.m.

Nonstop2h 25m

C$ 281

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 4/6

6:30 p.m.-11:21 p.m.

1 stop5h 51m

Chicago O'Hare Intl

Sun 7/6

6:12 p.m.-9:34 p.m.

Nonstop2h 22m

C$ 289

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 26/2

6:10 a.m.-9:41 a.m.

1 stop4h 31m

Chicago O'Hare Intl

Sat 7/3

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

1 stop3h 48m

C$ 309

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 26/2

6:10 a.m.-9:41 a.m.

1 stop4h 31m

Chicago O'Hare Intl

Wed 4/3

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

1 stop3h 48m

C$ 309

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

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$ 112). Flying from Region of Ontario to Chicago O'Hare Intl Airport in July is currently the most expensive (average of C$ 264). 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 4 February 2026.

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 22% on the cost of your flight, compared to a flight at noon.

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 31 January 2026.

Travelers seeking maximum savings on their Region of Ontario to Chicago O'Hare Intl Airport flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday at noon 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 4 February 2026.

The most flights from CAON to ORD are scheduled on a Monday (59 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (48 on average).

How much does it cost to fly round-trip from Region of Ontario to Chicago O'Hare Intl Airport?

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 1h 55m. United Airlines provides one of the quickest options available for as low as C$ 374. Region of Ontario and Chicago O'Hare Intl Airport are separated by a distance of 716 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$ 127 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$ 159 and C$ 161, 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 Toronto Island - 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 Copa Airlines (79%), Egyptair (72%) or Japan Airlines (70%) 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$ 1,635 for a flight from Region of Ontario to Chicago O'Hare Intl Airport. The cheapest flight overall is C$ 225 while the most popular route, (Toronto Pearson Intl - Chicago O'Hare Intl) is currently priced at C$ 274.

  • 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$ 112). Flying from Region of Ontario to Chicago O'Hare Intl Airport in July is currently the most expensive (average of C$ 264). 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

Browse thousands of different options on Cheapflights for your next trip

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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 4 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 220AverageC$ 288FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
American AirlinesCheapestC$ 222AverageC$ 409FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 244AverageC$ 464FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 258AverageC$ 509FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 364AverageC$ 469FlexibilityNo cancel feeOn-time60%
Search WestJet 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 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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