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$ 181 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

Tue, 6 Oct - Sat, 10 Oct

12:25 p.m. - 1:23 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

1h 58mdirect

9:55 a.m. - 12:40 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 45mdirect

C$ 275Air Canada

Tue, 6 Oct - Sat, 10 Oct

8:05 a.m. - 9:00 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

1h 55mdirect

3:40 p.m. - 11:18 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

6h 38m1 stop Montreal Pierre Elliott Trudeau Intl

C$ 279Air Canada

Thu, 29 Oct - Thu, 5 Nov

6:25 p.m. - 7:30 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mdirect

9:42 a.m. - 12:32 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 50mdirect

C$ 285American Airlines

Wed, 4 Nov - Wed, 4 Nov

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

2h 30mdirect

2:50 p.m. - 5:41 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 51mdirect

C$ 285American Airlines

Fri, 30 Oct - Sat, 31 Oct

7:26 p.m. - 8:48 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 22mdirect

7:03 a.m. - 9:47 a.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 44mdirect

C$ 285United Airlines

Mon, 26 Oct - Fri, 30 Oct

6:45 a.m. - 7:54 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 09mdirect

7:03 a.m. - 9:47 a.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 44mdirect

C$ 285United Airlines

Sat, 10 Oct - Tue, 13 Oct

7:00 a.m. - 8:00 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 00mdirect

8:40 p.m. - 11:26 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 46mdirect

C$ 285Multiple Airlines

Sat, 24 Oct - Tue, 27 Oct

7:00 a.m. - 8:00 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 00mdirect

8:40 p.m. - 11:23 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 43mdirect

C$ 285Multiple Airlines

Sat, 31 Oct - Fri, 6 Nov

10:35 a.m. - 11:40 a.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mdirect

6:20 p.m. - 9:06 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 46mdirect

C$ 286Porter Airlines

Wed, 11 Nov - Sat, 14 Nov

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

2h 05mdirect

12:20 p.m. - 3:06 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 46mdirect

C$ 289Porter Airlines

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

Sat, 19 Sep - Wed, 23 Sep

8:00 a.m. - 8:55 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

1h 55mdirect

8:40 p.m. - 11:26 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 46mdirect

C$ 360Air Canada

Sat, 19 Sep - Wed, 23 Sep

4:00 p.m. - 8:12 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

5h 12m1 stop Montreal Pierre Elliott Trudeau Intl

3:45 p.m. - 6:31 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 46mdirect

C$ 365Air Canada

Sun, 20 Sep - Thu, 1 Oct

8:50 a.m. - 9:53 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 03mdirect

7:09 a.m. - 9:54 a.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 45mdirect

C$ 375United Airlines

Sun, 20 Sep - Sat, 17 Oct

8:50 a.m. - 9:53 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 03mdirect

7:09 a.m. - 9:54 a.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 45mdirect

C$ 375United Airlines

Fri, 18 Sep - Fri, 25 Sep

7:00 a.m. - 8:00 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 00mdirect

8:40 p.m. - 11:26 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 46mdirect

C$ 375Multiple Airlines

Sun, 20 Sep - Tue, 29 Sep

8:50 a.m. - 9:53 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 03mdirect

5:35 p.m. - 8:18 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 43mdirect

C$ 375Multiple Airlines

Fri, 18 Sep - Sun, 20 Sep

1:15 p.m. - 2:20 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mdirect

8:30 p.m. - 11:26 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 56mdirect

C$ 465American Airlines

Sat, 19 Sep - Sun, 20 Sep

3:13 p.m. - 4:18 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mdirect

2:51 p.m. - 5:44 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 53mdirect

C$ 492American Airlines

Fri, 18 Sep - Thu, 24 Sep

6:30 a.m. - 7:40 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 10mdirect

2:51 p.m. - 5:44 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 53mdirect

C$ 535Porter Airlines

Fri, 18 Sep - Mon, 21 Sep

7:15 p.m. - 8:20 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mdirect

8:30 p.m. - 11:26 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 56mdirect

C$ 558Porter Airlines

Recent direct flight deals from Ontario to O'Hare Intl

Tue, 6 Oct - Sat, 10 Oct

12:25 p.m. - 1:23 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

1h 58mdirect

9:55 a.m. - 12:40 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 45mdirect

C$ 275Air Canada

Thu, 29 Oct - Thu, 5 Nov

6:25 p.m. - 7:30 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mdirect

9:42 a.m. - 12:32 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 50mdirect

C$ 285American Airlines

Fri, 2 Oct - Mon, 5 Oct

11:00 a.m. - 12:00 p.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 00mdirect

7:09 a.m. - 9:54 a.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 45mdirect

C$ 285United Airlines

Sun, 25 Oct - Sun, 1 Nov

6:45 a.m. - 7:54 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 09mdirect

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

1h 38mdirect

C$ 285United Airlines

Sat, 24 Oct - Mon, 26 Oct

8:05 a.m. - 9:00 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

1h 55mdirect

8:40 p.m. - 11:23 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 43mdirect

C$ 285Air Canada

Sat, 21 Nov - Tue, 24 Nov

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

2h 30mdirect

2:50 p.m. - 5:40 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 50mdirect

C$ 285American Airlines

Fri, 30 Oct - Tue, 3 Nov

8:35 a.m. - 9:44 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 09mdirect

12:50 p.m. - 3:33 p.m.ORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 43mdirect

C$ 285Multiple Airlines

Fri, 23 Oct - Tue, 27 Oct

8:50 a.m. - 9:48 a.m.YYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

1h 58mdirect

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

1h 37mdirect

C$ 285Multiple Airlines

Sat, 31 Oct - Fri, 6 Nov

10:35 a.m. - 11:40 a.m.YTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mdirect

6:20 p.m. - 9:06 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 46mdirect

C$ 286Porter Airlines

Wed, 11 Nov - Sat, 14 Nov

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

2h 05mdirect

12:20 p.m. - 3:06 p.m.ORD Chicago O'Hare Intl-YTZ Toronto Island

1h 46mdirect

C$ 289Porter Airlines

Useful Info

Low season	January
High season	August
Cheapest flight	C$ 181

Best time to beat the crowds (13% less expensive on average)

Most popular time to fly (11% 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

Joliet

Lisle

Hoffman Estates

Gurnee

Hammond

Elmhurst

Willowbrook

Arlington Heights

Tinley Park

Oakbrook Terrace

Des Plaines

Merrillville

Deerfield

Kenosha

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ORD

C$ 181 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

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

FAQs for booking Ontario to Chicago O'Hare Airport flights

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

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