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$ 222 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

Sun, 13 Dec - Mon, 14 Dec

8:05 a.m. - 9:08 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 03mdirect

8:50 p.m. - 11:32 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 42mdirect

C$ 314Air Canada

3+ days ago

Sat, 31 Oct - Sun, 1 Nov

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

2h 13mdirect

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

1h 37mdirect

C$ 316Air Canada

3+ days ago

Sat, 31 Oct - Sun, 1 Nov

5:55 p.m. - 7:05 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 10mdirect

5:55 a.m. - 2:25 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

7h 30m1 stop Washington, D.C. Dulles Intl

C$ 327Lufthansa

3+ days ago

Sat, 5 Dec - Sun, 6 Dec

2:45 p.m. - 11:29 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

9h 44m1 stop Washington, D.C. Dulles Intl

7:02 a.m. - 9:47 a.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 45mdirect

C$ 329Lufthansa

1 day ago

Fri, 27 Nov - Sat, 28 Nov

7:44 p.m. - 12:01 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

5h 17m1 stop Washington, D.C. Dulles Intl

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

1h 44mdirect

C$ 349United Airlines

2 days ago

Fri, 4 Dec - Sat, 5 Dec

7:44 p.m. - 11:29 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

4h 45m1 stop Washington, D.C. Dulles Intl

11:05 a.m. - 2:03 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 58mdirect

C$ 349United Airlines

3+ days ago

Wed, 2 Dec - Mon, 7 Dec

10:30 a.m. - 11:35 a.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$ 384Porter Airlines

1 day ago

Fri, 6 Nov - Mon, 9 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$ 384Porter Airlines

1 day ago

Thu, 3 Dec - Fri, 4 Dec

3:22 p.m. - 4:42 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 20mdirect

2:50 p.m. - 5:43 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 53mdirect

C$ 386American Airlines

2 days ago

Thu, 5 Nov - Sun, 8 Nov

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

2h 30mdirect

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

1h 50mdirect

C$ 386American Airlines

2 days ago

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

Thu, 15 Oct - Sun, 18 Oct

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

2h 05mdirect

8:06 a.m. - 10:59 a.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 53mdirect

C$ 497Qantas Airways

14 hours ago

Sat, 17 Oct - Tue, 20 Oct

7:29 a.m. - 8:39 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 10mdirect

9:46 a.m. - 12:34 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 48mdirect

C$ 561Porter Airlines

1 day ago

Sat, 17 Oct - Tue, 20 Oct

7:29 a.m. - 8:39 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 10mdirect

9:46 a.m. - 12:34 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 48mdirect

C$ 561Japan Airlines

23 hours ago

Sat, 17 Oct - Sat, 24 Oct

6:07 a.m. - 1:06 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

7h 59m1 stop Detroit Metropolitan Wayne County

5:36 p.m. - 11:03 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

4h 27m1 stop Detroit Metropolitan Wayne County

C$ 633WestJet

3+ days ago

Sun, 18 Oct - Fri, 30 Oct

9:47 a.m. - 4:39 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

7h 52m1 stop Detroit Metropolitan Wayne County

2:02 p.m. - 11:03 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

8h 01m1 stop Detroit Metropolitan Wayne County

C$ 633WestJet

3+ days ago

Sat, 17 Oct - Tue, 27 Oct

11:39 a.m. - 12:44 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 05mdirect

2:50 p.m. - 5:44 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 54mdirect

C$ 672American Airlines

3+ days ago

Sun, 18 Oct - Fri, 30 Oct

8:20 a.m. - 12:00 p.m.Toronto Toronto Island-Chicago Chicago O'Hare Intl

4h 40m1 stop Ottawa

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

1h 47mdirect

C$ 672Air Canada

3+ days ago

Sat, 17 Oct - Tue, 27 Oct

11:39 a.m. - 12:44 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 05mdirect

7:48 a.m. - 1:43 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

4h 55m1 stop Washington, D.C. Reagan-National

C$ 684American Airlines

3+ days ago

Sun, 18 Oct - Fri, 30 Oct

12:15 p.m. - 1:25 p.m.Toronto Toronto Island-Chicago Chicago O'Hare Intl

2h 10mdirect

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

1h 47mdirect

C$ 697Air Canada

3+ days ago

Mon, 19 Oct - Mon, 26 Oct

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

2h 05mdirect

9:46 a.m. - 12:34 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 48mdirect

C$ 721Porter Airlines

2 days ago

Recent direct flight deals from Ontario to O'Hare Intl

Sun, 13 Dec - Mon, 14 Dec

8:05 a.m. - 9:08 a.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 03mdirect

8:50 p.m. - 11:32 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 42mdirect

C$ 314Air Canada

3+ days ago

Sat, 31 Oct - Sun, 1 Nov

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

2h 13mdirect

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

1h 37mdirect

C$ 316Air Canada

3+ days ago

Fri, 13 Nov - Sun, 15 Nov

10:30 a.m. - 11:35 a.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$ 384Porter Airlines

2 days ago

Wed, 25 Nov - Wed, 2 Dec

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$ 384Porter Airlines

1 day ago

Thu, 3 Dec - Fri, 4 Dec

3:22 p.m. - 4:42 p.m.Toronto Toronto Pearson Intl-Chicago Chicago O'Hare Intl

2h 20mdirect

2:50 p.m. - 5:43 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 53mdirect

C$ 386American Airlines

2 days ago

Thu, 5 Nov - Sun, 8 Nov

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

2h 30mdirect

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

1h 50mdirect

C$ 386American Airlines

2 days ago

Thu, 5 Nov - Sun, 8 Nov

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

2h 04mdirect

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

1h 38mdirect

C$ 428Lufthansa

16 hours ago

Sat, 5 Dec - Sun, 6 Dec

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

2h 09mdirect

1:57 p.m. - 4:47 p.m.Chicago Chicago O'Hare Intl-Toronto Toronto Pearson Intl

1h 50mdirect

C$ 428Lufthansa

1 day ago

Thu, 5 Nov - Sun, 15 Nov

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

2h 22mdirect

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

1h 44mdirect

C$ 433United Airlines

13 hours ago

Thu, 12 Nov - Sun, 15 Nov

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

2h 22mdirect

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

1h 38mdirect

C$ 433United Airlines

1 day ago

Useful Info

Low season	January
High season	August
Cheapest flight	C$ 222

Best time to beat the crowds (6% less expensive on average)

Most popular time to fly (7% 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

Elk Grove Village

Skokie

Downers Grove

Joliet

Lisle

Hammond

Hoffman Estates

Gurnee

Elmhurst

Arlington Heights

Willowbrook

Tinley Park

Oakbrook Terrace

Des Plaines

Oak Brook

Kenosha

Merrillville

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ORD

C$ 222 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

Flights from domestic origins to Ontario

Choose which airport to fly into in Chicago

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