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Cheap flights from Ontario to Chicago from $109

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Chicago departing on 2/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
9:25 am - 11:18 am
YUL
-
ORD
2h 53mnonstop
Air Canada Logo
12:50 pm - 4:05 pm
ORD
-
YUL
2h 15mnonstop
$182Air Canada
Thu, Mar 26 - Mon, Mar 30
Air Canada Logo
6:25 pm - 8:10 pm
YUL
-
ORD
2h 45mnonstop
Air Canada Logo
7:15 am - 10:20 am
ORD
-
YUL
2h 05mnonstop
$184Air Canada
Thu, Feb 19 - Sat, Feb 21
United Airlines Logo
4:45 pm - 6:45 pm
YUL
-
ORD
3h 00mnonstop
United Airlines Logo
8:50 am - 3:16 pm
ORD
-
YUL
5h 26m
1 stop
$185United Airlines
Thu, Feb 19 - Sat, Feb 21
United Airlines Logo
7:00 am - 8:00 am
YYZ
-
ORD
2h 00mnonstop
United Airlines Logo
9:15 pm - 11:59 pm
ORD
-
YYZ
1h 44mnonstop
$189United Airlines
Fri, Jun 19 - Sun, Jun 21
Air Canada Logo
2:15 pm - 3:10 pm
YYZ
-
ORD
1h 55mnonstop
Air Canada Logo
8:40 pm - 11:19 pm
ORD
-
YYZ
1h 39mnonstop
$190Air Canada
Thu, Feb 19 - Mon, Mar 2
Lufthansa Logo
8:45 am - 9:50 am
YYZ
-
ORD
2h 05mnonstop
Lufthansa Logo
6:28 pm - 9:21 pm
ORD
-
YYZ
1h 53mnonstop
$192Lufthansa
Thu, Feb 19 - Mon, Feb 23
Lufthansa Logo
8:45 am - 9:50 am
YYZ
-
ORD
2h 05mnonstop
Lufthansa Logo
6:28 pm - 9:21 pm
ORD
-
YYZ
1h 53mnonstop
$194Lufthansa
Thu, Feb 19 - Mon, Feb 23
American Airlines Logo
7:30 am - 1:57 pm
YUL
-
ORD
7h 27m
1 stop
American Airlines Logo
6:40 am - 3:22 pm
ORD
-
YUL
7h 42m
1 stop
$209American Airlines
Wed, Feb 18 - Sat, Feb 21
Multiple Airlines Logo
3:40 pm - 12:40 am
YOW
-
ORD
10h 00m
2 stops
Multiple Airlines Logo
8:16 pm - 5:25 pm
ORD
-
YOW
20h 09m
1 stop
$277Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
Multiple Airlines Logo
3:55 pm - 12:40 am
YOW
-
ORD
9h 45m
1 stop
Multiple Airlines Logo
8:16 pm - 5:25 pm
ORD
-
YOW
20h 09m
1 stop
$278Multiple Airlines
Tue, Feb 24 - Tue, Mar 3

Air Canada flights from Region of Ontario to Chicago O'Hare Intl Airport

Our best Air Canada deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets
Air Canada
Mar 26
YUL9:25 amMontreal Pierre Elliott Trudeau Intl
2h 53m
ORD11:18 amChicago O'Hare Intl
Mar 30
ORD12:50 pmChicago O'Hare Intl
2h 15m
YUL4:05 pmMontreal Pierre Elliott Trudeau Intl
$182
Air Canada
Feb 19
YUL6:25 pmMontreal Pierre Elliott Trudeau Intl
2h 45m
ORD8:10 pmChicago O'Hare Intl
Feb 21
ORD7:15 amChicago O'Hare Intl
2h 05m
YUL10:20 amMontreal Pierre Elliott Trudeau Intl
$184
Air Canada
Jun 11
YUL8:15 amMontreal Pierre Elliott Trudeau Intl
2h 38m
ORD9:53 amChicago O'Hare Intl
Jun 14
ORD8:45 amChicago O'Hare Intl
2h 15m
YUL12:00 pmMontreal Pierre Elliott Trudeau Intl
$190

Lufthansa flights from Region of Ontario to Chicago O'Hare Intl Airport

Our best Lufthansa deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets
Lufthansa
Feb 19
YYZ8:45 amToronto Pearson Intl
2h 05m
ORD9:50 amChicago O'Hare Intl
Feb 23
ORD6:28 pmChicago O'Hare Intl
1h 53m
YYZ9:21 pmToronto Pearson Intl
$192
Lufthansa
Feb 19
YYZ8:45 amToronto Pearson Intl
2h 05m
ORD9:50 amChicago O'Hare Intl
Feb 23
ORD6:28 pmChicago O'Hare Intl
1h 53m
YYZ9:21 pmToronto Pearson Intl
$194
Lufthansa
Feb 19
YYZ9:00 pmToronto Pearson Intl
2h 04m
ORD10:04 pmChicago O'Hare Intl
Feb 23
ORD9:15 pmChicago O'Hare Intl
1h 44m
YYZ11:59 pmToronto Pearson Intl
$197

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to Chicago O'Hare Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Ontario to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 3/26

9:25 am-11:18 am

Nonstop2h 53m

Chicago O'Hare Intl

Mon 3/30

12:50 pm-4:05 pm

Nonstop2h 15m

$182

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 2/19

6:25 pm-8:10 pm

Nonstop2h 45m

Chicago O'Hare Intl

Sat 2/21

7:15 am-10:20 am

Nonstop2h 05m

$184

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 2/19

4:45 pm-6:45 pm

Nonstop3h 00m

Chicago O'Hare Intl

Sat 2/21

8:50 am-3:16 pm

1 stop5h 26m

$185

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Fri 6/19

7:00 am-8:00 am

Nonstop2h 00m

Chicago O'Hare Intl

Sun 6/21

9:15 pm-11:59 pm

Nonstop1h 44m

$189

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 2/19

2:15 pm-3:10 pm

Nonstop1h 55m

Chicago O'Hare Intl

Mon 3/2

8:40 pm-11:19 pm

Nonstop1h 39m

$190

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 2/19

8:45 am-9:50 am

Nonstop2h 05m

Chicago O'Hare Intl

Mon 2/23

6:28 pm-9:21 pm

Nonstop1h 53m

$192

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 2/19

8:45 am-9:50 am

Nonstop2h 05m

Chicago O'Hare Intl

Mon 2/23

6:28 pm-9:21 pm

Nonstop1h 53m

$194

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 2/18

7:30 am-1:57 pm

1 stop7h 27m

Chicago O'Hare Intl

Sat 2/21

6:40 am-3:22 pm

1 stop7h 42m

$209

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 2/24

3:40 pm-12:40 am

2 stops10h 00m

Chicago O'Hare Intl

Tue 3/3

8:16 pm-5:25 pm

1 stop20h 09m

$277

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Tue 2/24

3:55 pm-12:40 am

1 stop9h 45m

Chicago O'Hare Intl

Tue 3/3

8:16 pm-5:25 pm

1 stop20h 09m

$278

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chicago from

How to get the cheapest flight ticket from Region of Ontario to Chicago O'Hare Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

The month of May is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Region of Ontario averaging around $263.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Friday when prices can be found for as low as $458. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from Region of Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $724.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Flying to Chicago O'Hare Intl Airport from Region of Ontario in the evening is the least expensive time of day to depart. momondo users have found prices as low as $372 when looking at flights departing in the evening. Try not to purchase tickets in the afternoon because they tend to be around $680. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ontario to Chicago O'Hare Intl flight route?

Fly from Toronto Pearson Intl to Chicago O'Hare Intl for the best Ontario - Chicago O'Hare Intl flight prices

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $286 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Region of Ontario for as low as $195 on momondo.

What cabin class options are available on Ontario to Chicago O'Hare Intl flights?

There are 4 cabin classes available to choose from on Ontario to Chicago O'Hare Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to Chicago O'Hare Intl Airport flights?

No. A direct flight is the cheapest option for a flight between Region of Ontario to Chicago O'Hare Intl Airport.

Cheap Region of Ontario to Chicago O'Hare Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Chicago O'Hare Intl Airport

Best Price Found

$217

Fastest flight time

1h 55m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from Region of Ontario in the past 72 hours is $217. The best round-trip flight deal from Region of Ontario to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $313.
The fastest flight from Region of Ontario to Chicago O'Hare Intl Airport takes 1h 55m
Direct flights go from Region of Ontario to Chicago O'Hare Intl Airport every day.
Search flight deals

  • When did momondo last update prices for flights from Ontario to Chicago O'Hare Intl Airport?

    Prices for flights from Ontario to Chicago O'Hare Intl Airport were last updated today.

  • How many operators does momondo search for flights from Ontario to Chicago O'Hare Intl Airport?

  • How old do you have to be to fly from Ontario to Chicago O'Hare Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Chicago O'Hare Intl Airport.

  • What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

    The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Region of Ontario to Chicago O'Hare Intl Airport?

Best airlines flying from Region of Ontario to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Region of Ontario to Chicago O'Hare Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $140Free CancellationRating
7.1
10,667 reviews
Search Air Canada flights
United AirlinesPriceFrom $165Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
Porter AirlinesPriceFrom $180Free CancellationRating
7.9
412 reviews
Search Porter Airlines flights
American AirlinesPriceFrom $189Free CancellationRating
7.2
11,206 reviews
Search American Airlines flights

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Lake Geneva
Schaumburg
South Haven
Rockford
Merrillville
Gurnee
Naperville
Rosemont
New Buffalo
Kenosha
Joliet
Oak Brook
Orland Park
Racine
Hammond
Janesville
Tinley Park
Elgin
Aurora
South Holland

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Chicago?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Chicago. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to Chicago with flexible booking policies on momondo?

All flight searches from Ontario to Chicago on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Chicago?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Chicago.

I’m not ready to book a flight from Ontario to Chicago right now. Can momondo alert me if prices change?

Price alerts on flights to Chicago from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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