How many flights depart from Region of Ontario to Illinois on average per week?

As of September 2025, there are 768 flights per week flying from Region of Ontario to Illinois. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.

How many flights depart from Region of Ontario to Illinois on average per day?

As of September 2025, there are 109 flights per day flying from Region of Ontario to Illinois. The most common time of day flights depart is 6:00AM, with 46% of flights taking off at noon.

What is the cheapest airline that flies from Ontario to Illinois?

Porter Airlines, WestJet, and Air Transat are the most popular carriers operating from Ontario to Illinois

What airlines fly to Illinois?

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Illinois 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 Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How long is the flight from Region of Ontario to Illinois?

The flight from Region of Ontario to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Ottawa (a popular airport in Region of Ontario) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 2h 08m on average. If you fly from Toronto (another popular airport in Region of Ontario) to Chicago O'Hare Intl Airport, then the average flight time is 3h 26m.

When did momondo last update prices for flights from Ontario to Illinois?

Prices for flights from Ontario to Illinois were last updated today.

How many operators does momondo search for flights from Ontario to Illinois?

The number of operators available for flights from Ontario to Illinois is 6 as of September 2025.

How old do you have to be to fly from Ontario to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$141 Cheap Flights from Ontario to Illinois in 2025/26

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Find the cheapest flights from Ontario to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

4:00 pm - 11:44 pmYYZ-ORD

8h 44m1 stop

6:54 pm - 8:00 pmORD-YYZ

24h 06m1 stop

$207Multiple Airlines

Find Deal

Mon, Oct 20 - Thu, Oct 30

7:15 am - 4:23 pmYYZ-ORD

10h 08m1 stop

5:25 am - 8:00 pmORD-YYZ

13h 35m1 stop

$209Multiple Airlines

Find Deal

Tue, Oct 28 - Fri, Oct 31

10:45 am - 4:24 pmYUL-MDW

6h 39m1 stop

5:20 pm - 10:15 pmMDW-YUL

3h 55m1 stop

$243Porter Airlines

Find Deal

Thu, Oct 16 - Sun, Oct 19

1:10 pm - 4:24 pmYUL-MDW

4h 14m1 stop

5:20 pm - 10:15 pmMDW-YUL

3h 55m1 stop

$244Porter Airlines

Find Deal

Thu, Oct 16 - Sun, Oct 19

8:20 am - 9:51 amYUL-ORD

2h 31mnonstop

8:40 am - 11:54 amORD-YUL

2h 14mnonstop

$258Air Canada

Find Deal

Thu, Oct 16 - Sun, Oct 19

8:20 am - 9:51 amYUL-ORD

2h 31mnonstop

8:40 am - 11:54 amORD-YUL

2h 14mnonstop

$262Air Canada

Find Deal

Thu, Oct 16 - Sun, Oct 19

10:30 am - 3:58 pmYUL-ORD

6h 28m1 stop

8:44 pm - 1:34 pmORD-YUL

15h 50m1 stop

$294American Airlines

Find Deal

Tue, Oct 14 - Fri, Oct 24

7:29 am - 10:54 pmYUL-ORD

16h 25m1 stop

11:49 am - 3:11 pmORD-YUL

2h 22mnonstop

$302American Airlines

Find Deal

Wed, Oct 29 - Sun, Nov 2

6:15 am - 8:01 amYUL-ORD

2h 46mnonstop

10:38 am - 2:00 pmORD-YUL

2h 22mnonstop

$325United Airlines

Find Deal

Tue, Oct 14 - Tue, Dec 2

6:00 am - 8:00 amYUL-ORD

3h 00mnonstop

5:55 pm - 9:17 pmORD-YUL

2h 22mnonstop

$326United Airlines

Find Deal

Sat, Nov 22 - Mon, Nov 24

United Airlines flights from Region of Ontario to Illinois

Our best United Airlines deals on Region of Ontario to Illinois flight tickets

United Airlines

Oct 14

YUL6:15 amMontreal Pierre Elliott Trudeau Intl

2h 46m

ORD8:01 amChicago O'Hare Intl

Dec 2

ORD10:38 amChicago O'Hare Intl

2h 22m

YUL2:00 pmMontreal Pierre Elliott Trudeau Intl

$325

Find similar

United Airlines

Nov 22

YUL6:00 amMontreal Pierre Elliott Trudeau Intl

3h 00m

ORD8:00 amChicago O'Hare Intl

Nov 24

ORD5:55 pmChicago O'Hare Intl

2h 22m

YUL9:17 pmMontreal Pierre Elliott Trudeau Intl

$326

Find similar

United Airlines

Oct 11

YOW5:25 pmOttawa

2h 29m

ORD6:54 pmChicago O'Hare Intl

Oct 12

ORD8:50 amChicago O'Hare Intl

4h 23m

1 stop

YOW2:13 pmOttawa

$350

Find similar

American Airlines flights from Region of Ontario to Illinois

Our best American Airlines deals on Region of Ontario to Illinois flight tickets

American Airlines

Oct 14

YUL10:30 amMontreal Pierre Elliott Trudeau Intl

6h 28m

1 stop

ORD3:58 pmChicago O'Hare Intl

Oct 24

ORD8:44 pmChicago O'Hare Intl

15h 50m

1 stop

YUL1:34 pmMontreal Pierre Elliott Trudeau Intl

$294

Find similar

American Airlines

Oct 29

YUL7:29 amMontreal Pierre Elliott Trudeau Intl

16h 25m

1 stop

ORD10:54 pmChicago O'Hare Intl

Nov 2

ORD11:49 amChicago O'Hare Intl

2h 22m

YUL3:11 pmMontreal Pierre Elliott Trudeau Intl

$302

Find similar

American Airlines

Oct 17

YUL5:24 pmMontreal Pierre Elliott Trudeau Intl

2h 35m

ORD6:59 pmChicago O'Hare Intl

Oct 20

ORD8:44 pmChicago O'Hare Intl

15h 50m

1 stop

YUL1:34 pmMontreal Pierre Elliott Trudeau Intl

$317

Find similar

Fly from

Fly to

Route

Depart

Return

Price

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Mon 10/20

4:00 pm-11:44 pm

1 stop8h 44m

Chicago O'Hare Intl

Thu 10/30

6:54 pm-8:00 pm

1 stop24h 06m

$207

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Tue 10/28

7:15 am-4:23 pm

1 stop10h 08m

Chicago O'Hare Intl

Fri 10/31

5:25 am-8:00 pm

1 stop13h 35m

$209

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 10/16

10:45 am-4:24 pm

1 stop6h 39m

Chicago Midway

Sun 10/19

5:20 pm-10:15 pm

1 stop3h 55m

$243

MontrealChicago

YUL - MDW

YULMDW

Montreal Pierre Elliott Trudeau Intl

Thu 10/16

1:10 pm-4:24 pm

1 stop4h 14m

Chicago Midway

Sun 10/19

5:20 pm-10:15 pm

1 stop3h 55m

$244

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 10/16

8:20 am-9:51 am

Nonstop2h 31m

Chicago O'Hare Intl

Sun 10/19

8:40 am-11:54 am

Nonstop2h 14m

$258

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 10/16

8:20 am-9:51 am

Nonstop2h 31m

Chicago O'Hare Intl

Sun 10/19

8:40 am-11:54 am

Nonstop2h 14m

$262

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 10/14

10:30 am-3:58 pm

1 stop6h 28m

Chicago O'Hare Intl

Fri 10/24

8:44 pm-1:34 pm

1 stop15h 50m

$294

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Wed 10/29

7:29 am-10:54 pm

1 stop16h 25m

Chicago O'Hare Intl

Sun 11/2

11:49 am-3:11 pm

Nonstop2h 22m

$302

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Tue 10/14

6:15 am-8:01 am

Nonstop2h 46m

Chicago O'Hare Intl

Tue 12/2

10:38 am-2:00 pm

Nonstop2h 22m

$325

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Sat 11/22

6:00 am-8:00 am

Nonstop3h 00m

Chicago O'Hare Intl

Mon 11/24

5:55 pm-9:17 pm

Nonstop2h 22m

$326

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How to get the cheapest flight ticket from Region of Ontario to Illinois

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 Illinois?

The cheapest month to fly to Illinois from Region of Ontario is in July. Flight prices, which tend to average around $217, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of July, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $225.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Region of Ontario to Illinois is on a Saturday when prices can be found for as low as $434. Flights from Region of Ontario to Illinois on a Monday will generally be more expensive and average around $701. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Region of Ontario to Illinois during this time can be as low as $398. Flights in the afternoon are often more expensive with an average ticket price of $607.

What is the cheapest Ontario to Illinois flight route?

Fly from Toronto Island to Chicago Midway for the best Ontario - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $292 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Region of Ontario for as low as $216 on momondo.

What cabin class options are available on Ontario to Illinois flights?

There are 4 cabin classes available to choose from on Ontario to Illinois 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 Illinois flights?

No. A direct flight is the cheapest option for a flight between Region of Ontario to Illinois.

Cheap Region of Ontario to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Illinois

Best Price Found	$189
Fastest flight time	1h 49m
Direct flights	Every day
Airports in Illinois	1 airport

The best one-way flight to Illinois from Region of Ontario in the past 72 hours is $189. The best round-trip flight deal from Region of Ontario to Illinois found on momondo in the last 72 hours is $192.

The fastest flight from Region of Ontario to Illinois takes 1h 49m

Direct flights go from Region of Ontario to Illinois every day.

There is 1 airport near Illinois: Chicago Midway (MDW)

Search flight deals

When did momondo last update prices for flights from Ontario to Illinois?
Prices for flights from Ontario to Illinois were last updated today.
How many operators does momondo search for flights from Ontario to Illinois?
The number of operators available for flights from Ontario to Illinois is 6 as of September 2025.
How old do you have to be to fly from Ontario to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Region of Ontario to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Region of Ontario to Illinois is De Havilland (Bombardier) DHC-8-400 Dash 8Q, representing 19.05% of all bookings. The subsequent popular models are Embraer 175 (Enhanced Winglets) at 15.40%, Boeing 737-800 at 11.28%, and Embraer 175 at 8.03%.

Best airlines flying from Region of Ontario to Illinois

Compare and see reviews for airlines that fly from Region of Ontario to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Air Canada	PriceFrom $146	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
Porter Airlines	PriceFrom $158	Free Cancellation	Rating 7.9 368 reviews	Search Porter Airlines flights
United Airlines	PriceFrom $165	Free Cancellation	Rating 7.4 8,922 reviews	Search United Airlines flights
American Airlines	PriceFrom $196	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
WestJet	PriceFrom $208	Free Cancellation	Rating 7.2 3,105 reviews	Search WestJet flights

Why use momondo?

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

Finding the right flight to Illinois from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Illinois from Ontario which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to Illinois from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Illinois 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.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Illinois

Popular cities in Illinois

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Flights to Seattlefrom $102

Cheap flights from Ontario to Illinois from $141

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 Illinois departing on 10/27. 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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Big names and deals

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Filter for what you want

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Find the cheapest flights from Ontario to Illinois

Cheap round-trip flights

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Cheap last minute flights

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United Airlines flights from Region of Ontario to Illinois

Our best United Airlines deals on Region of Ontario to Illinois flight tickets

American Airlines flights from Region of Ontario to Illinois

Our best American Airlines deals on Region of Ontario to Illinois flight tickets

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How to get the cheapest flight ticket from Region of Ontario to Illinois

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 Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Region of Ontario to Illinois during this time can be as low as $398. Flights in the afternoon are often more expensive with an average ticket price of $607.

What is the cheapest Ontario to Illinois flight route?

Fly from Toronto Island to Chicago Midway for the best Ontario - Illinois flight prices

How far in advance should I book a flight to Illinois?

What cabin class options are available on Ontario to Illinois flights?

There are 4 cabin classes available to choose from on Ontario to Illinois 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 Illinois flights?

No. A direct flight is the cheapest option for a flight between Region of Ontario to Illinois.

What is the cheapest airline that flies from Ontario to Illinois?

Porter Airlines, WestJet, and Air Transat are the most popular carriers operating from Ontario to Illinois

What airlines fly to Illinois?

How many flights depart from Region of Ontario to Illinois on average per day?

As of September 2025, there are 109 flights per day flying from Region of Ontario to Illinois. The most common time of day flights depart is 6:00AM, with 46% of flights taking off at noon.

How many flights depart from Region of Ontario to Illinois on average per week?

As of September 2025, there are 768 flights per week flying from Region of Ontario to Illinois. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.

How long is the flight from Region of Ontario to Illinois?

Cheap Region of Ontario to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Ontario to Illinois?

How many operators does momondo search for flights from Ontario to Illinois?

How old do you have to be to fly from Ontario to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model from Region of Ontario to Illinois?

Best airlines flying from Region of Ontario to Illinois

Compare and see reviews for airlines that fly from Region of Ontario to Illinois with momondo

Why use momondo?

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

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

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

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

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo