How does KAYAK find such low prices on flights from Ontario to Chicago?

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. Visit our flight page for the latest deals!>/a>

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from Ontario is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Ontario to Chicago?

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 with an airline and back to Ontario with another airline. Visit our flight page for the latest deals!>/a>

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

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 from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$105 CHEAP FLIGHTS from Ontario to Chicago (ORD)

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago O'Hare Intl Airport

...and more

Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

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Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$183

Typical prices: $329-$477

United Airlines

Wed 2/11Thu 2/19

YUL - ORD • 1 stop

Cheapest non-stop

$184

Typical prices: $330-$495

Air Canada

Thu 2/5Sun 2/8

YUL - ORD • Non-stop

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Chicago!

Flight Deals

Cheap Flights from Ontario to Chicago

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Chicago that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

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 Chicago

Wed, Feb 11 - Thu, Feb 19

7:00 am - 1:15 pm

YUL

ORD

7h 15m

1 stop

7:10 am - 1:28 pm

ORD

YUL

5h 18m

1 stop

$183United Airlines

Thu, Feb 5 - Sun, Feb 8

9:25 am - 11:06 am

YUL

ORD

2h 41mnonstop

3:35 pm - 6:40 pm

ORD

YUL

2h 05mnonstop

$184Air Canada

Thu, Feb 5 - Sun, Feb 8

6:45 pm - 7:45 pm

YYZ

ORD

2h 00mnonstop

10:00 am - 12:40 pm

ORD

YYZ

1h 40mnonstop

$185Air Canada

Sat, Feb 14 - Sat, Feb 21

6:25 pm - 8:10 pm

YUL

ORD

2h 45mnonstop

7:15 am - 10:20 am

ORD

YUL

2h 05mnonstop

$185Air Canada

Thu, Feb 5 - Tue, Feb 10

7:00 am - 1:50 pm

YYZ

ORD

7h 50m

1 stop

6:31 pm - 9:23 pm

ORD

YYZ

1h 52mnonstop

$188American Airlines

Sat, Feb 14 - Sat, Feb 21

1:10 pm - 2:55 pm

YUL

ORD

2h 45mnonstop

7:15 am - 10:20 am

ORD

YUL

2h 05mnonstop

$188Air Canada

Wed, Feb 18 - Fri, Feb 20

6:00 am - 7:15 am

YYZ

ORD

2h 15mnonstop

6:40 am - 3:30 pm

ORD

YYZ

7h 50m

1 stop

$191American Airlines

Thu, Feb 5 - Sun, Feb 8

9:00 am - 10:06 am

YYZ

ORD

2h 06mnonstop

1:13 pm - 4:02 pm

ORD

YYZ

1h 49mnonstop

$197Lufthansa

Thu, Feb 26 - Sun, Mar 1

9:25 am - 6:29 pm

YTZ

ORD

10h 04m

1 stop

6:40 am - 10:03 pm

ORD

YTZ

14h 23m

2 stops

$245Multiple Airlines

Thu, Feb 26 - Sun, Mar 1

9:25 am - 6:29 pm

YTZ

ORD

10h 04m

1 stop

6:40 am - 4:25 pm

ORD

YTZ

8h 45m

1 stop

$249Multiple Airlines

Useful Info

Low season	November
High season	July
Cheapest flight	$105

Best time to beat the crowds with an average 4% drop in price.

Most popular time to fly with an average 1% increase in price.

Flight from Montreal to Chicago O'Hare Airport

BrianFlew with Air Canada

YYZ

ORD

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

YYZ

ORD

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?
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.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Chicago?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Ontario to Chicago?
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 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?
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 from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Gurnee

South Haven

Merrillville

Oak Brook

Saint Joseph

Tinley Park

Elk Grove Village

Des Plaines

Hoffman Estates

Hammond

Willowbrook

Portage

South Holland

Delavan

Northbrook

Pleasant Prairie

Lansing

Elmhurst

Lisle

Valparaiso

Everything you need to know for your flight to Chicago

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Information on your arrival and departure airports

Chicago (ORD)

$105 Find Cheap Flights from Ontario to Chicago

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago O'Hare Intl Airport

Everything you should know

Cheap Flights from Ontario to Chicago

Recent round-trip flight deals from Ontario to Chicago

Recent one-way flight deals from Ontario to Chicago

Recent last minute flight deals from Ontario to Chicago

Recent direct flight deals from Ontario to Chicago

Good to know

Flights from Ontario to Chicago: the best tips from KAYAK users

FAQs for booking Ontario to Chicago flights

How does KAYAK find such low prices on flights from Ontario to Chicago?

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.

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

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

What is the Hacker Fare option on flights from Ontario to Chicago?

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 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?

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 from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Chicago?

Everything you need to know for your flight to Chicago

Information on your arrival and departure airports

Cabin class types available on flights to Chicago

Complete your trip to Chicago with a hotel stay or car rental

Find direct flights for Chicago

Flights to other popular destinations

Flights from domestic origins to Ontario

Choose which airport to fly into in Chicago