$124 Find Cheap Flights from Ontario to Chicago

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Chicago departing on 6/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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.

Recent round-trip flight deals from Ontario to Chicago

Tue, May 26 - Fri, May 29
Air Canada Logo
6:40 pm - 7:40 pm
YYZ
-
ORD
2h 00mnonstop
Air Canada Logo
3:50 pm - 6:33 pm
ORD
-
YYZ
1h 43mnonstop
$205Air Canada
Thu, Sep 10 - Sun, Sep 13
Porter Airlines Logo
10:05 am - 11:00 am
YTZ
-
ORD
1h 55mnonstop
Porter Airlines Logo
11:45 am - 2:25 pm
ORD
-
YTZ
1h 40mnonstop
$205Porter Airlines
Thu, Jun 11 - Thu, Jun 18
Air Canada Logo
8:00 am - 9:00 am
YYZ
-
ORD
2h 00mnonstop
Air Canada Logo
8:40 pm - 11:26 pm
ORD
-
YYZ
1h 46mnonstop
$206Air Canada
Thu, Sep 17 - Mon, Sep 21
Porter Airlines Logo
8:40 pm - 9:35 pm
YTZ
-
ORD
1h 55mnonstop
Porter Airlines Logo
7:00 am - 9:40 am
ORD
-
YTZ
1h 40mnonstop
$206Porter Airlines
Thu, Sep 10 - Sun, Sep 13
Porter Airlines Logo
10:05 am - 11:00 am
YTZ
-
ORD
1h 55mnonstop
Porter Airlines Logo
11:45 am - 2:25 pm
ORD
-
YTZ
1h 40mnonstop
$208Porter Airlines
Mon, Sep 14 - Fri, Sep 18
Porter Airlines Logo
8:40 pm - 9:35 pm
YTZ
-
ORD
1h 55mnonstop
Porter Airlines Logo
7:00 am - 9:40 am
ORD
-
YTZ
1h 40mnonstop
$210Porter Airlines
Sat, Jun 6 - Tue, Jun 9
American Airlines Logo
12:39 pm - 9:00 pm
YYZ
-
ORD
9h 21m
1 stop
American Airlines Logo
8:35 pm - 11:29 pm
ORD
-
YYZ
1h 54mnonstop
$220American Airlines
Tue, May 5 - Sun, May 10
Delta Logo
4:11 pm - 6:52 pm
YYZ
-
ORD
3h 41m
1 stop
Delta Logo
7:00 am - 1:30 pm
ORD
-
YYZ
5h 30m
1 stop
$230Delta
Thu, May 7 - Sat, May 16
United Airlines Logo
5:00 pm - 6:52 pm
YUL
-
ORD
2h 52mnonstop
United Airlines Logo
6:00 am - 1:09 pm
ORD
-
YUL
6h 09m
1 stop
$288United Airlines
Thu, May 7 - Sat, May 16
United Airlines Logo
6:00 am - 1:15 pm
YUL
-
ORD
8h 15m
1 stop
United Airlines Logo
7:00 am - 1:09 pm
ORD
-
YUL
5h 09m
1 stop
$294United Airlines
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Good to know

Low seasonFebruary
Cheapest flight$124
Best time to beat the crowds but there is an average 22% increase in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Toronto Pearson Airport to Chicago O'Hare Airport

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

Insights shared by verified travelers who flew the route from Ontario to Chicago 
Learn how KAYAK collects reviews and tips from users.
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

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?

Book flights to Chicago if you plan to visit one of these locations
Gurnee
South Haven
Merrillville
Oak Brook
Saint Joseph
Tinley Park
Elk Grove Village
Hammond
Des Plaines
Hoffman Estates
Willowbrook
Portage
South Holland
Delavan
Northbrook
Lansing
Lisle
Pleasant Prairie
Elmhurst
Valparaiso

Everything you need to know for your flight to Chicago

Information on your arrival and departure airports

Chicago (ORD)