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

United Airlines, Air Canada, 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 48% 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 55m 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 19m.

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 August 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.

$136 Cheap Flights from Region of Ontario to Chicago O'Hare Intl Airport in 2026

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

85 flights are operational daily from Region of Ontario to Chicago O'Hare Intl Airport as of August 2026. The most popular departure time for this route is 11:00AM, with 45% of flights per day taking off at noon.

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.

8:50 am - 9:48 am

YYZ

ORD

1h 58mnonstop

9:18 pm - 11:59 pm

ORD

YYZ

1h 41mnonstop

$204United Airlines

Sat, Oct 10 - Tue, Oct 13

7:00 am - 8:00 am

YYZ

ORD

2h 00mnonstop

9:18 pm - 11:59 pm

ORD

YYZ

1h 41mnonstop

$204United Airlines

Sun, Oct 4 - Mon, Oct 5

6:50 pm - 7:48 pm

YYZ

ORD

1h 58mnonstop

9:55 am - 12:40 pm

ORD

YYZ

1h 45mnonstop

$205Air Canada

Mon, Sep 14 - Mon, Sep 21

8:05 am - 9:00 am

YYZ

ORD

1h 55mnonstop

11:05 am - 6:12 pm

ORD

YYZ

6h 07m

1 stop

$205Air Canada

Mon, Sep 28 - Wed, Sep 30

1:00 pm - 2:05 pm

YYZ

ORD

2h 05mnonstop

3:45 pm - 10:56 pm

ORD

YYZ

6h 11m

1 stop

$208Multiple Airlines

Wed, Oct 21 - Sat, Oct 31

6:30 am - 7:40 am

YYZ

ORD

2h 10mnonstop

8:03 am - 10:59 am

ORD

YYZ

1h 56mnonstop

$209American Airlines

Fri, Sep 25 - Mon, Sep 28

7:15 pm - 8:20 pm

YYZ

ORD

2h 05mnonstop

9:53 am - 4:45 pm

ORD

YYZ

5h 52m

1 stop

$209American Airlines

Fri, Sep 11 - Sat, Sep 12

9:00 pm - 10:05 pm

YYZ

ORD

2h 05mnonstop

9:55 am - 12:40 pm

ORD

YYZ

1h 45mnonstop

$209Multiple Airlines

Mon, Sep 14 - Sun, Sep 27

4:35 pm - 5:30 pm

YTZ

ORD

1h 55mnonstop

11:45 am - 2:25 pm

ORD

YTZ

1h 40mnonstop

$235Porter Airlines

Fri, Dec 4 - Sun, Dec 6

4:35 pm - 5:30 pm

YTZ

ORD

1h 55mnonstop

6:10 pm - 8:50 pm

ORD

YTZ

1h 40mnonstop

$247Porter Airlines

Thu, Dec 10 - Sun, Dec 20

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

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

Delta

Aug 21

YYZ2:24 pmToronto Pearson Intl

7h 06m

1 stop

ORD8:30 pmChicago O'Hare Intl

Aug 23

ORD6:59 amChicago O'Hare Intl

7h 21m

1 stop

YYZ3:20 pmToronto Pearson Intl

$235

Delta

Sep 11

YYZ12:08 pmToronto Pearson Intl

5h 05m

1 stop

ORD4:13 pmChicago O'Hare Intl

Sep 18

ORD8:55 amChicago O'Hare Intl

7h 25m

1 stop

YYZ5:20 pmToronto Pearson Intl

$243

Delta

Aug 22

YUL7:00 amMontreal Pierre Elliott Trudeau Intl

10h 51m

1 stop

ORD4:51 pmChicago O'Hare Intl

Aug 26

ORD1:50 pmChicago O'Hare Intl

9h 02m

1 stop

YUL11:52 pmMontreal Pierre Elliott Trudeau Intl

$280

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

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

WestJet

Aug 12

YYZ6:15 amToronto Pearson Intl

7h 58m

1 stop

ORD1:13 pmChicago O'Hare Intl

Aug 18

ORD5:25 pmChicago O'Hare Intl

4h 43m

1 stop

YYZ11:08 pmToronto Pearson Intl

$308

WestJet

Aug 11

YYZ9:50 amToronto Pearson Intl

7h 32m

1 stop

ORD4:22 pmChicago O'Hare Intl

Aug 15

ORD7:04 amChicago O'Hare Intl

7h 21m

1 stop

YYZ3:25 pmToronto Pearson Intl

$309

WestJet

Aug 10

YYZ6:15 amToronto Pearson Intl

7h 58m

1 stop

ORD1:13 pmChicago O'Hare Intl

Aug 13

ORD8:53 amChicago O'Hare Intl

7h 36m

1 stop

YYZ5:29 pmToronto Pearson Intl

$337

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

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Sat 10/10

8:50 am-9:48 am

Nonstop1h 58m

Chicago O'Hare Intl

Tue 10/13

9:18 pm-11:59 pm

Nonstop1h 41m

$204

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Sun 10/4

7:00 am-8:00 am

Nonstop2h 00m

Chicago O'Hare Intl

Mon 10/5

9:18 pm-11:59 pm

Nonstop1h 41m

$204

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Mon 9/14

6:50 pm-7:48 pm

Nonstop1h 58m

Chicago O'Hare Intl

Mon 9/21

9:55 am-12:40 pm

Nonstop1h 45m

$205

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Mon 9/28

8:05 am-9:00 am

Nonstop1h 55m

Chicago O'Hare Intl

Wed 9/30

11:05 am-6:12 pm

1 stop6h 07m

$205

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Wed 10/21

1:00 pm-2:05 pm

Nonstop2h 05m

Chicago O'Hare Intl

Sat 10/31

3:45 pm-10:56 pm

1 stop6h 11m

$208

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Fri 9/25

6:30 am-7:40 am

Nonstop2h 10m

Chicago O'Hare Intl

Mon 9/28

8:03 am-10:59 am

Nonstop1h 56m

$209

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Fri 9/11

7:15 pm-8:20 pm

Nonstop2h 05m

Chicago O'Hare Intl

Sat 9/12

9:53 am-4:45 pm

1 stop5h 52m

$209

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Mon 9/14

9:00 pm-10:05 pm

Nonstop2h 05m

Chicago O'Hare Intl

Sun 9/27

9:55 am-12:40 pm

Nonstop1h 45m

$209

Quickest round-trip

TorontoChicago

YTZ - ORD

YTZORD

Toronto Island

Fri 12/4

4:35 pm-5:30 pm

Nonstop1h 55m

Chicago O'Hare Intl

Sun 12/6

11:45 am-2:25 pm

Nonstop1h 40m

$235

TorontoChicago

YTZ - ORD

YTZORD

Toronto Island

Thu 12/10

4:35 pm-5:30 pm

Nonstop1h 55m

Chicago O'Hare Intl

Sun 12/20

6:10 pm-8:50 pm

Nonstop1h 40m

$247

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 $295.

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 $465. 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 $752.

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 $392 when looking at flights departing in the evening. Try not to purchase tickets in the afternoon because they tend to be around $759. 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 $305 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 $175 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?

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	$161
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 $161. 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 $207.

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

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 August 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 17.86% of the total bookings. Other popular models include Boeing 737-800 with 10.10%, Embraer 175 (Enhanced Winglets) with 9.98%, and Boeing 737-900 with 8.20%.

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 11,415 reviews	Search Air Canada flights
American Airlines	PriceFrom $189	Free Cancellation	Rating 7.1 11,845 reviews	Search American Airlines flights
United Airlines	PriceFrom $189	Free Cancellation	Rating 7.4 10,062 reviews	Search United Airlines flights
Porter Airlines	PriceFrom $232	Free Cancellation	Rating 8.0 449 reviews	Search Porter Airlines flights

Lake Geneva

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South Haven

Merrillville

Rockford

Gurnee

Rosemont

Orland Park

Oak Brook

Naperville

Joliet

New Buffalo

Kenosha

Hammond

Aurora

Racine

Janesville

Elgin

Evanston

South Holland

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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 $136

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 9/5. 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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Delta flights from Region of Ontario to Chicago O'Hare Intl Airport

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

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

Our best WestJet 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.

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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

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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

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