How does KAYAK find such low prices on flights from Ontario to Chicago O'Hare Airport?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Chicago O'Hare Airport.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Chicago O'Hare Airport?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from Ontario is likely to change within 7 days, so travellers know whether to wait or book now.

What is the Hacker Fare option on flights from Ontario to Chicago O'Hare Airport?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago O'Hare Airport with an airline and back to Ontario with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Chicago O'Hare Airport?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago O'Hare Airport from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

C$ 212 CHEAP FLIGHTS from Ontario to Chicago O'Hare (ORD)

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Flight Deals

Cheap Flights from Ontario to O'Hare Intl

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Ontario to O'Hare Intl

Fri, 11 Dec - Mon, 14 Dec

4:35 p.m. - 5:40 p.m.Toronto Toronto Island-Chicago Chicago O'Hare Intl

2h 05mdirect

6:20 p.m. - 9:05 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Island

1h 45mdirect

C$ 333Porter Airlines

2 days ago

Mon, 7 Dec - Mon, 7 Dec

10:29 a.m. - 11:34 a.m.Toronto Toronto Island-Chicago Chicago O'Hare Intl

2h 05mdirect

6:20 p.m. - 9:05 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Island

1h 45mdirect

C$ 341Porter Airlines

2 days ago

Sun, 20 Dec - Thu, 24 Dec

6:55 p.m. - 7:58 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 03mdirect

10:05 a.m. - 12:42 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 37mdirect

C$ 364Air Canada

11 hours ago

Tue, 1 Dec - Fri, 4 Dec

10:45 a.m. - 3:02 p.m.Toronto Toronto Island-Chicago Chicago O'Hare Intl

5h 17m1 stop Montreal Pierre Elliott Trudeau Intl

1:55 p.m. - 4:42 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Island

1h 47mdirect

C$ 366Air Canada

2 days ago

Thu, 10 Dec - Thu, 17 Dec

7:09 a.m. - 8:39 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 30mdirect

9:45 a.m. - 3:30 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

4h 45m1 stop Philadelphia

C$ 381American Airlines

2 days ago

Wed, 30 Dec - Fri, 1 Jan

6:45 a.m. - 7:57 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 12mdirect

8:55 p.m. - 11:37 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 42mdirect

C$ 387Multiple Airlines

2 days ago

Fri, 1 Jan - Mon, 4 Jan

7:26 p.m. - 8:40 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 14mdirect

10:05 a.m. - 12:42 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 37mdirect

C$ 387Multiple Airlines

2 days ago

Sun, 20 Dec - Fri, 25 Dec

7:14 a.m. - 8:44 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 30mdirect

2:45 p.m. - 5:38 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 53mdirect

C$ 398American Airlines

2 days ago

Wed, 16 Dec - Thu, 7 Jan

10:53 a.m. - 11:57 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 04mdirect

9:22 p.m. - 11:59 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 37mdirect

C$ 404United Airlines

1 day ago

Fri, 25 Dec - Fri, 1 Jan

7:26 p.m. - 8:40 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 14mdirect

3:45 p.m. - 6:45 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

2h 00mdirect

C$ 404United Airlines

1 day ago

Recent last minute flight deals from Ontario to O'Hare Intl

Mon, 16 Nov - Fri, 20 Nov

4:35 p.m. - 5:40 p.m.Toronto Toronto Island-Chicago Chicago O'Hare Intl

2h 05mdirect

12:15 p.m. - 3:00 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Island

1h 45mdirect

C$ 505Porter Airlines

14 hours ago

Tue, 17 Nov - Wed, 25 Nov

6:55 p.m. - 7:58 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 03mdirect

10:15 a.m. - 12:52 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 37mdirect

C$ 542Air Canada

2 days ago

Fri, 13 Nov - Mon, 16 Nov

6:21 p.m. - 7:41 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 20mdirect

8:45 p.m. - 11:46 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

2h 01mdirect

C$ 553British Airways

2 days ago

Thu, 12 Nov - Mon, 16 Nov

6:21 p.m. - 7:41 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 20mdirect

8:45 p.m. - 11:46 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

2h 01mdirect

C$ 553British Airways

2 days ago

Tue, 17 Nov - Wed, 25 Nov

12:05 p.m. - 1:20 p.m.Toronto Toronto Island-Chicago Chicago O'Hare Intl

2h 15mdirect

1:55 p.m. - 4:42 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Island

1h 47mdirect

C$ 555Air Canada

2 days ago

Fri, 13 Nov - Sun, 15 Nov

7:09 a.m. - 8:39 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 30mdirect

8:45 p.m. - 11:46 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

2h 01mdirect

C$ 582Porter Airlines

10 hours ago

Tue, 17 Nov - Thu, 26 Nov

10:53 a.m. - 11:57 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 04mdirect

5:00 a.m. - 11:48 a.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

5h 48m1 stop Newark

C$ 606United Airlines

1 day ago

Tue, 17 Nov - Fri, 27 Nov

3:35 p.m. - 4:44 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 09mdirect

9:21 p.m. - 11:59 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 38mdirect

C$ 606United Airlines

1 day ago

Tue, 17 Nov - Tue, 17 Nov

7:09 a.m. - 8:39 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 30mdirect

8:45 p.m. - 11:46 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

2h 01mdirect

C$ 686American Airlines

2 days ago

Tue, 17 Nov - Wed, 18 Nov

1:17 p.m. - 2:37 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 20mdirect

8:45 p.m. - 11:46 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

2h 01mdirect

C$ 686American Airlines

2 days ago

Recent direct flight deals from Ontario to O'Hare Intl

Fri, 11 Dec - Mon, 14 Dec

4:35 p.m. - 5:40 p.m.Toronto Toronto Island-Chicago Chicago O'Hare Intl

2h 05mdirect

6:20 p.m. - 9:05 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Island

1h 45mdirect

C$ 333Porter Airlines

2 days ago

Mon, 7 Dec - Mon, 7 Dec

10:29 a.m. - 11:34 a.m.Toronto Toronto Island-Chicago Chicago O'Hare Intl

2h 05mdirect

6:20 p.m. - 9:05 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Island

1h 45mdirect

C$ 341Porter Airlines

2 days ago

Sun, 20 Dec - Thu, 24 Dec

6:55 p.m. - 7:58 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 03mdirect

10:05 a.m. - 12:42 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 37mdirect

C$ 364Air Canada

11 hours ago

Fri, 4 Dec - Sun, 6 Dec

4:30 p.m. - 5:43 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 13mdirect

10:05 a.m. - 12:42 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 37mdirect

C$ 366Air Canada

2 days ago

Wed, 30 Dec - Fri, 1 Jan

6:45 a.m. - 7:57 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 12mdirect

8:55 p.m. - 11:37 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 42mdirect

C$ 387Multiple Airlines

2 days ago

Fri, 1 Jan - Mon, 4 Jan

7:26 p.m. - 8:40 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 14mdirect

10:05 a.m. - 12:42 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 37mdirect

C$ 387Multiple Airlines

2 days ago

Sun, 20 Dec - Fri, 25 Dec

7:14 a.m. - 8:44 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 30mdirect

2:45 p.m. - 5:38 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 53mdirect

C$ 398American Airlines

2 days ago

Tue, 8 Dec - Tue, 15 Dec

6:23 p.m. - 7:43 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 20mdirect

9:42 a.m. - 12:35 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 53mdirect

C$ 398American Airlines

2 days ago

Wed, 16 Dec - Thu, 7 Jan

10:53 a.m. - 11:57 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 04mdirect

9:22 p.m. - 11:59 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 37mdirect

C$ 404United Airlines

1 day ago

Fri, 25 Dec - Fri, 1 Jan

7:26 p.m. - 8:40 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 14mdirect

3:45 p.m. - 6:45 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

2h 00mdirect

C$ 404United Airlines

1 day ago

Useful Info

Low season	January
High season	August
Cheapest flight	C$ 212

Best time to beat the crowds (16% less expensive on average)

Most popular time to fly (1% more expensive on average)

Flight from Toronto Pearson Airport to Chicago O'Hare Airport

NicholFlew with United Airlines-Aug 2026

If you are a US citizen, make sure you allow enough time for customs in Toronto Pearson airport. My trip was really quick and smooth, but I've seen it at other times where it has been busier and needed more time.

BrianFlew with Air Canada-Oct 2024

Be prepared for a labyrinthine experience traversing the various levels and passages of the Toronto airport. Bring quality walking shoes, as it is likely well over a km in total walking time.

Verified travelerFlew with United Airlines-Mar 2024

Carry-on baggage sizing for United US bound flights appears to be much smaller than for Canadian flights, which forced me to check my bag at the last minute. So check online ahead of time

How does KAYAK find such low prices on flights from Ontario to Chicago O'Hare Airport?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Chicago O'Hare Airport.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Chicago O'Hare Airport?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from Ontario is likely to change within 7 days, so travellers know whether to wait or book now.
What is the Hacker Fare option on flights from Ontario to Chicago O'Hare Airport?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago O'Hare Airport with an airline and back to Ontario with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Chicago O'Hare Airport?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago O'Hare Airport from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Rosemont

Schaumburg

Naperville

Skokie

Elk Grove Village

Downers Grove

Hammond

Joliet

Lisle

Hoffman Estates

Elmhurst

Willowbrook

Tinley Park

Arlington Heights

Gurnee

Munster

Oak Brook

Oakbrook Terrace

Des Plaines

Kenosha

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ORD

C$ 212 Find Cheap Flights from Ontario to Chicago O'Hare Airport – Compare and Save

Cheap Flights from Ontario to O'Hare Intl

Recent round-trip flight deals from Ontario to O'Hare Intl

Recent one-way flight deals from Ontario to O'Hare Intl

Recent last minute flight deals from Ontario to O'Hare Intl

Recent direct flight deals from Ontario to O'Hare Intl

Good to know

Low season

High season

Cheapest flight

Flights from Ontario to O'Hare Intl: the best tips from KAYAK users

FAQs for booking Ontario to Chicago O'Hare Airport flights

Travelling to a place near O'Hare Intl?

More options for your flight to O'Hare Intl

Complete your trip to O'Hare Intl with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights to O'Hare Intl

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Choose which airport to fly into in Chicago

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