What is the cheapest airline that flies from Ontario to Chicago O'Hare Intl?

Porter Airlines, Air Transat, and Delta are the most popular carriers operating from Ontario to Chicago O'Hare Intl

What airlines fly to Chicago O'Hare Intl Airport?

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from Region of Ontario according to our data. Air Canada is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Chicago O'Hare Intl Airport. Keep in mind that there are 4 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Chicago O'Hare Intl Airport?

On average, it takes 1h 59m to fly from Region of Ontario to Chicago O'Hare Intl Airport if you fly out of Toronto (the most popular airport in Region of Ontario) and into Chicago O'Hare Intl Airport (the most popular airport in Chicago O'Hare Intl Airport). If you’re flying out of Ottawa and into Chicago O'Hare Intl Airport, then the flight time is around 2h 36m.

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?

As of October 2026, there are 4 operators available to choose from 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.

$135 Cheap Flights from Region of Ontario to Chicago O'Hare Intl Airport in 2026/27

Q: How many flights depart from Region of Ontario to Chicago O'Hare Intl Airport on average per day?

41 flights are operational daily from Region of Ontario to Chicago O'Hare Intl Airport as of October 2026. The most popular departure time for this route is 3:00PM, with 45% of flights per day taking off in the afternoon.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Chicago

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:35 pm - 5:40 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mnonstop

6:20 pm - 9:05 pmORD Chicago O'Hare Intl-YTZ Toronto Island

1h 45mnonstop

$213Porter Airlines

Thu, Nov 19 - Mon, Nov 23

4:35 pm - 5:40 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mnonstop

6:20 pm - 9:05 pmORD Chicago O'Hare Intl-YTZ Toronto Island

1h 45mnonstop

$213Porter Airlines

Thu, Nov 19 - Mon, Nov 23

8:20 am - 3:02 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

7h 42m2 stops Ottawa Montreal Pierre Elliott Trudeau Intl

1:55 pm - 4:42 pmORD Chicago O'Hare Intl-YTZ Toronto Island

1h 47mnonstop

$222Air Canada

Fri, Dec 11 - Mon, Dec 14

8:00 am - 3:00 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

8h 00m1 stop Montreal Pierre Elliott Trudeau Intl

10:15 am - 12:52 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 37mnonstop

$222Air Canada

Fri, Nov 20 - Tue, Nov 24

7:09 am - 8:39 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 30mnonstop

9:42 am - 12:35 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 53mnonstop

$229American Airlines

Wed, Dec 2 - Sun, Dec 6

7:09 am - 8:39 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 30mnonstop

9:42 am - 12:35 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 53mnonstop

$229American Airlines

Fri, Dec 4 - Sat, Dec 5

7:44 pm - 12:01 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

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

7:03 am - 9:47 amORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 44mnonstop

$234Lufthansa

Sat, Nov 14 - Sun, Nov 15

2:45 pm - 11:29 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

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

11:05 am - 2:03 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 58mnonstop

$235Lufthansa

Sat, Dec 12 - Sun, Dec 13

7:44 pm - 12:01 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

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

7:03 am - 9:47 amORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 44mnonstop

$247United Airlines

Fri, Nov 13 - Sat, Nov 14

7:44 pm - 12:01 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

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

11:05 am - 2:03 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 58mnonstop

$248United Airlines

Fri, Nov 13 - Sat, Nov 14

Cheap last minute flights

Enter your travel dates to find the best prices.

7:43 am - 1:59 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

7h 16m1 stop Newark

6:17 pm - 9:15 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 58mnonstop

$330United Airlines

Sat, Oct 31 - Sat, Oct 31

7:43 am - 1:59 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

7h 16m1 stop Newark

6:17 pm - 9:15 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 58mnonstop

$345United Airlines

Sat, Oct 31 - Sat, Oct 31

4:35 pm - 5:40 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mnonstop

6:20 pm - 9:05 pmORD Chicago O'Hare Intl-YTZ Toronto Island

1h 45mnonstop

$363Porter Airlines

Mon, Nov 2 - Tue, Dec 1

1:15 pm - 2:20 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mnonstop

9:42 am - 12:32 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 50mnonstop

$369Qantas Airways

Sat, Oct 31 - Tue, Nov 3

4:35 pm - 5:40 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mnonstop

12:15 pm - 3:00 pmORD Chicago O'Hare Intl-YTZ Toronto Island

1h 45mnonstop

$373Porter Airlines

Mon, Nov 2 - Mon, Nov 30

7:35 am - 3:37 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

9h 02m1 stop Fort Lauderdale

10:19 am - 3:20 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

28h 01m2 stops Atlanta Hartsfield-Jackson Fort Lauderdale

$387Multiple Airlines

Sat, Oct 31 - Thu, Nov 12

8:20 am - 9:23 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 03mnonstop

8:45 am - 11:27 amORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 42mnonstop

$407Air Canada

Thu, Nov 5 - Wed, Nov 25

12:05 pm - 1:20 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

2h 15mnonstop

1:55 pm - 4:42 pmORD Chicago O'Hare Intl-YTZ Toronto Island

1h 47mnonstop

$416Air Canada

Thu, Nov 5 - Wed, Nov 25

6:21 pm - 7:41 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 20mnonstop

8:45 pm - 11:46 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

2h 01mnonstop

$425American Airlines

Tue, Nov 3 - Tue, Nov 10

1:17 pm - 2:37 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 20mnonstop

12:01 pm - 7:00 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

5h 59m1 stop New York LaGuardia

$435American Airlines

Tue, Nov 3 - Tue, Nov 10

Cheap direct flights

Enter your travel dates to find the best prices.

4:35 pm - 5:40 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mnonstop

6:20 pm - 9:05 pmORD Chicago O'Hare Intl-YTZ Toronto Island

1h 45mnonstop

$213Porter Airlines

Sat, Dec 5 - Sun, Dec 6

4:35 pm - 5:40 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

2h 05mnonstop

6:20 pm - 9:05 pmORD Chicago O'Hare Intl-YTZ Toronto Island

1h 45mnonstop

$213Porter Airlines

Thu, Nov 19 - Mon, Nov 23

2:35 pm - 3:38 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 03mnonstop

10:05 am - 12:42 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 37mnonstop

$223Air Canada

Fri, Dec 11 - Mon, Dec 14

12:05 pm - 1:20 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

2h 15mnonstop

1:55 pm - 4:42 pmORD Chicago O'Hare Intl-YTZ Toronto Island

1h 47mnonstop

$224Air Canada

Sun, Nov 22 - Tue, Nov 24

7:09 am - 8:39 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 30mnonstop

9:42 am - 12:35 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 53mnonstop

$229American Airlines

Wed, Dec 2 - Sun, Dec 6

7:09 am - 8:39 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 30mnonstop

9:42 am - 12:35 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 53mnonstop

$229American Airlines

Fri, Dec 4 - Sat, Dec 5

8:35 am - 9:44 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 09mnonstop

8:40 pm - 11:23 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 43mnonstop

$264Multiple Airlines

Sat, Nov 14 - Mon, Nov 16

6:45 am - 7:57 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 12mnonstop

10:05 am - 12:42 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 37mnonstop

$266Multiple Airlines

Tue, Jan 5 - Sat, Jan 9

6:45 am - 7:57 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 12mnonstop

9:22 pm - 11:59 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 37mnonstop

$301United Airlines

Sat, Dec 26 - Thu, Dec 31

6:45 am - 7:57 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 12mnonstop

3:45 pm - 6:45 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

2h 00mnonstop

$301United Airlines

Mon, Dec 28 - Thu, Dec 31

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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

Nov 14

YYZ7:44 pmToronto Pearson Intl

5h 17m

1 stop

ORD12:01 amChicago O'Hare Intl

Nov 15

ORD7:03 amChicago O'Hare Intl

1h 44m

YYZ9:47 amToronto Pearson Intl

$234

Lufthansa

Dec 12

YYZ2:45 pmToronto Pearson Intl

9h 44m

1 stop

ORD11:29 pmChicago O'Hare Intl

Dec 13

ORD11:05 amChicago O'Hare Intl

1h 58m

YYZ2:03 pmToronto Pearson Intl

$235

Lufthansa

Nov 14

YYZ7:44 pmToronto Pearson Intl

5h 17m

1 stop

ORD12:01 amChicago O'Hare Intl

Nov 15

ORD7:03 amChicago O'Hare Intl

1h 44m

YYZ9:47 amToronto Pearson Intl

$236

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

Our best Porter Airlines deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets

Porter Airlines

Nov 19

YTZ4:35 pmToronto Island

2h 05m

ORD5:40 pmChicago O'Hare Intl

Nov 23

ORD6:20 pmChicago O'Hare Intl

1h 45m

YTZ9:05 pmToronto Island

$213

Porter Airlines

Nov 19

YTZ4:35 pmToronto Island

2h 05m

ORD5:40 pmChicago O'Hare Intl

Nov 22

ORD6:20 pmChicago O'Hare Intl

1h 45m

YTZ9:05 pmToronto Island

$214

Porter Airlines

Jan 5

YTZ4:35 pmToronto Island

1h 55m

ORD5:30 pmChicago O'Hare Intl

Jan 9

ORD6:20 pmChicago O'Hare Intl

1h 40m

YTZ9:00 pmToronto Island

$215

momondo Fare Finder

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

Cheapest round-trip

Quickest round-trip

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Thu 11/19

4:35 pm-5:40 pm

Nonstop2h 05m

Chicago O'Hare Intl

Mon 11/23

6:20 pm-9:05 pm

Nonstop1h 45m

$213

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Thu 11/19

4:35 pm-5:40 pm

Nonstop2h 05m

Chicago O'Hare Intl

Mon 11/23

6:20 pm-9:05 pm

Nonstop1h 45m

$213

TorontoChicago

YTZ Toronto Island - ORD Chicago O'Hare Intl

YTZORD

Toronto Island

Fri 12/11

8:20 am-3:02 pm

2 stops7h 42m

Chicago O'Hare Intl

Mon 12/14

1:55 pm-4:42 pm

Nonstop1h 47m

$222

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Fri 11/20

8:00 am-3:00 pm

1 stop8h 00m

Chicago O'Hare Intl

Tue 11/24

10:15 am-12:52 pm

Nonstop1h 37m

$222

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Wed 12/2

7:09 am-8:39 am

Nonstop2h 30m

Chicago O'Hare Intl

Sun 12/6

9:42 am-12:35 pm

Nonstop1h 53m

$229

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Fri 12/4

7:09 am-8:39 am

Nonstop2h 30m

Chicago O'Hare Intl

Sat 12/5

9:42 am-12:35 pm

Nonstop1h 53m

$229

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Sat 11/14

7:44 pm-12:01 am

1 stop5h 17m

Chicago O'Hare Intl

Sun 11/15

7:03 am-9:47 am

Nonstop1h 44m

$234

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Sat 12/12

2:45 pm-11:29 pm

1 stop9h 44m

Chicago O'Hare Intl

Sun 12/13

11:05 am-2:03 pm

Nonstop1h 58m

$235

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Fri 11/13

7:44 pm-12:01 am

1 stop5h 17m

Chicago O'Hare Intl

Sat 11/14

7:03 am-9:47 am

Nonstop1h 44m

$247

TorontoChicago

YYZ Toronto Pearson Intl - ORD Chicago O'Hare Intl

YYZORD

Toronto Pearson Intl

Fri 11/13

7:44 pm-12:01 am

1 stop5h 17m

Chicago O'Hare Intl

Sat 11/14

11:05 am-2:03 pm

Nonstop1h 58m

$248

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $298.

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 $481. 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 $669.

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 $427 when looking at flights departing in the evening. Try not to purchase tickets in the afternoon because they tend to be around $789. 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 Island to Chicago O'Hare Intl for the best Ontario - Chicago O'Hare Intl flight prices

How far in advance should I book a flight from Ontario 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 $314 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 $226 on momondo.

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

There are 4 cabin classes available to choose from on Region of Ontario to Chicago O'Hare Intl Airport 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?

You could potentially save up to 1% on your flight if you consider stops on a Region of Ontario to Chicago O'Hare Intl Airport flight.

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	$135
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 $135. 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 $213.

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.

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Frequently asked questions about flying from Ontario to Chicago O'Hare Intl Airport

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?
As of October 2026, there are 4 operators available to choose from 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?
Based on momondo bookings for flights between Region of Ontario and Chicago O'Hare Intl Airport, the leading plane model is De Havilland (Bombardier) DHC-8-400 Dash 8Q, making up 18.22% of the total bookings. Other popular models include Embraer 175 (Enhanced Winglets) with 10.31%, Boeing 737 MAX 8 with 9.12%, and Embraer 195 E2 with 7.70%.

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 Canada	PriceFrom $137	Free Cancellation	Rating 7.1 11,832 reviews	Search Air Canada flights
United Airlines	PriceFrom $190	Free Cancellation	Rating 7.3 10,451 reviews	Search United Airlines flights
American Airlines	PriceFrom $193	Free Cancellation	Rating 7.0 12,210 reviews	Search American Airlines flights
Porter Airlines	PriceFrom $235	Free Cancellation	Rating 8.0 468 reviews	Search Porter Airlines flights

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Rockford

South Haven

Rosemont

Oak Brook

Gurnee

Orland Park

Joliet

Naperville

New Buffalo

Kenosha

Hammond

Aurora

Racine

Elgin

Janesville

Skokie

Waukegan

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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Cheap flights from Ontario to Chicago from $135

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 12/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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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

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

Our best Porter Airlines deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets

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Use the filters below to find and compare flights from Ontario to Chicago O'Hare Intl Airport that are best for you.

See travel insights to Chicago from

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

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

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

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

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

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

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

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

What is the cheapest airline that flies from Ontario to Chicago O'Hare Intl?

What airlines fly to Chicago O'Hare Intl Airport?

How many flights depart from Region of Ontario to Chicago O'Hare Intl Airport on average per day?

How many flights depart from Region of Ontario to Chicago O'Hare Intl Airport on average per week?

How long does it take to fly to Chicago O'Hare Intl Airport?

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from 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

Traveling to a place near Chicago?

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An easier way to manage your Chicago O'Hare Intl Airport trip

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Cabin classes currently available on flights to Chicago

List of cabin classes available on flights landing in Chicago. Availability may vary depending on flight origin and airline.

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