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 48% 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 many flights depart from Region of Ontario to Illinois on average per day?

As of November 2025, there are 91 flights per day flying from Region of Ontario to Illinois. The most common time of day flights depart is 11:00AM, with 48% of flights taking off at noon.

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

As of November 2025, there are 638 flights per week flying from Region of Ontario to Illinois. The most common day of the week flights depart is Fri, with 16% of flights taking off on this day.

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 32m.

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

American Airlines, Porter Airlines, and Air Canada are the most popular carriers operating from Ontario to Illinois

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 November 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.

$124 Cheap Flights from Ontario to Illinois in 2025/26

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Find the cheapest flights from Ontario to Illinois

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Cheap round-trip flights

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7:55 am - 8:45 amYTZ-MDW

1h 50mnonstop

5:20 pm - 8:02 pmMDW-YTZ

1h 42mnonstop

$189Multiple Airlines

Find Deal

Fri, May 1 - Mon, May 4

6:00 am - 7:15 amYYZ-ORD

2h 15mnonstop

6:06 am - 11:56 amORD-YYZ

4h 50m1 stop

$192American Airlines

Find Deal

Fri, Dec 5 - Tue, Dec 9

9:15 am - 10:05 amYTZ-MDW

1h 50mnonstop

11:00 am - 1:42 pmMDW-YTZ

1h 42mnonstop

$194Porter Airlines

Find Deal

Thu, Nov 27 - Tue, Dec 2

2:15 pm - 3:10 pmYYZ-ORD

1h 55mnonstop

8:15 pm - 10:54 pmORD-YYZ

1h 39mnonstop

$195Air Canada

Find Deal

Thu, Nov 27 - Mon, Dec 1

9:15 am - 10:05 amYTZ-MDW

1h 50mnonstop

11:00 am - 1:42 pmMDW-YTZ

1h 42mnonstop

$195Porter Airlines

Find Deal

Mon, Nov 24 - Wed, Nov 26

9:00 pm - 9:52 pmYYZ-ORD

1h 52mnonstop

1:19 pm - 4:02 pmORD-YYZ

1h 43mnonstop

$200United Airlines

Find Deal

Thu, Nov 27 - Sun, Nov 30

8:30 am - 2:55 pmYTZ-ORD

7h 25m1 stop

7:15 am - 2:55 pmORD-YTZ

6h 40m1 stop

$202Air Canada

Find Deal

Fri, Jan 16 - Sun, Jan 18

9:00 pm - 10:05 pmYYZ-ORD

2h 05mnonstop

6:28 pm - 9:21 pmORD-YYZ

1h 53mnonstop

$206United Airlines

Find Deal

Tue, Dec 23 - Tue, Jan 6

7:55 am - 8:45 amYTZ-MDW

1h 50mnonstop

9:40 am - 12:20 pmMDW-YTZ

1h 40mnonstop

$207Air Transat

Find Deal

Fri, May 1 - Sat, May 2

9:15 am - 10:05 amYTZ-MDW

1h 50mnonstop

5:20 pm - 8:02 pmMDW-YTZ

1h 42mnonstop

$211Air Transat

Find Deal

Thu, Apr 30 - Wed, May 6

American Airlines flights from Region of Ontario to Illinois

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

American Airlines

Dec 5

YYZ6:00 amToronto Pearson Intl

2h 15m

ORD7:15 amChicago O'Hare Intl

Dec 9

ORD6:06 amChicago O'Hare Intl

4h 50m

1 stop

YYZ11:56 amToronto Pearson Intl

$192

Find similar

American Airlines

Dec 11

YYZ6:00 amToronto Pearson Intl

2h 15m

ORD7:15 amChicago O'Hare Intl

Dec 17

ORD9:40 amChicago O'Hare Intl

5h 10m

1 stop

YYZ3:50 pmToronto Pearson Intl

$193

Find similar

American Airlines

Nov 22

YYZ4:07 pmToronto Pearson Intl

5h 19m

1 stop

ORD8:26 pmChicago O'Hare Intl

Nov 29

ORD3:00 pmChicago O'Hare Intl

1h 40m

YYZ5:40 pmToronto Pearson Intl

$194

Find similar

Air Canada flights from Region of Ontario to Illinois

Our best Air Canada deals on Region of Ontario to Illinois flight tickets

Air Canada

Nov 27

YYZ2:15 pmToronto Pearson Intl

1h 55m

ORD3:10 pmChicago O'Hare Intl

Dec 1

ORD8:15 pmChicago O'Hare Intl

1h 39m

YYZ10:54 pmToronto Pearson Intl

$195

Find similar

Air Canada

Nov 22

YYZ6:30 pmToronto Pearson Intl

2h 00m

ORD7:30 pmChicago O'Hare Intl

Nov 27

ORD8:15 pmChicago O'Hare Intl

1h 39m

YYZ10:54 pmToronto Pearson Intl

$200

Find similar

Air Canada

Jan 16

YTZ8:30 amToronto Island

7h 25m

1 stop

ORD2:55 pmChicago O'Hare Intl

Jan 18

ORD7:15 amChicago O'Hare Intl

6h 40m

1 stop

YTZ2:55 pmToronto Island

$202

Find similar

Fly from

Fly to

Route

Depart

Return

Price

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Fri 5/1

7:55 am-8:45 am

Nonstop1h 50m

Chicago Midway

Mon 5/4

5:20 pm-8:02 pm

Nonstop1h 42m

$189

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Fri 12/5

6:00 am-7:15 am

Nonstop2h 15m

Chicago O'Hare Intl

Tue 12/9

6:06 am-11:56 am

1 stop4h 50m

$192

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Thu 11/27

9:15 am-10:05 am

Nonstop1h 50m

Chicago Midway

Tue 12/2

11:00 am-1:42 pm

Nonstop1h 42m

$194

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 11/27

2:15 pm-3:10 pm

Nonstop1h 55m

Chicago O'Hare Intl

Mon 12/1

8:15 pm-10:54 pm

Nonstop1h 39m

$195

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Mon 11/24

9:15 am-10:05 am

Nonstop1h 50m

Chicago Midway

Wed 11/26

11:00 am-1:42 pm

Nonstop1h 42m

$195

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 11/27

9:00 pm-9:52 pm

Nonstop1h 52m

Chicago O'Hare Intl

Sun 11/30

1:19 pm-4:02 pm

Nonstop1h 43m

$200

TorontoChicago

YTZ - ORD

YTZORD

Toronto Island

Fri 1/16

8:30 am-2:55 pm

1 stop7h 25m

Chicago O'Hare Intl

Sun 1/18

7:15 am-2:55 pm

1 stop6h 40m

$202

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Tue 12/23

9:00 pm-10:05 pm

Nonstop2h 05m

Chicago O'Hare Intl

Tue 1/6

6:28 pm-9:21 pm

Nonstop1h 53m

$206

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Fri 5/1

7:55 am-8:45 am

Nonstop1h 50m

Chicago Midway

Sat 5/2

9:40 am-12:20 pm

Nonstop1h 40m

$207

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Thu 4/30

9:15 am-10:05 am

Nonstop1h 50m

Chicago Midway

Wed 5/6

5:20 pm-8:02 pm

Nonstop1h 42m

$211

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Showing 1-10 of 20 resultsSorted by cheapest first

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 Friday when prices can be found for as low as $459. Flights from Region of Ontario to Illinois on a Monday will generally be more expensive and average around $733. 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 $431. Flights in the afternoon are often more expensive with an average ticket price of $626.

What is the cheapest Ontario to Illinois flight route?

Fly from Toronto Pearson Intl to Chicago O'Hare Intl 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 $293 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 $195 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 50m
Direct flights	Every day
Airports in Illinois	2 airports

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 $286.

The fastest flight from Region of Ontario to Illinois takes 1h 50m

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

There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), 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 November 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 16.62% of all bookings. The subsequent popular models are Embraer 175 (Enhanced Winglets) at 13.52%, Boeing 737 MAX 8 at 9.84%, and Boeing 737-800 at 9.58%.

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 10,429 reviews	Search Air Canada flights
Porter Airlines	PriceFrom $158	Free Cancellation	Rating 8.0 388 reviews	Search Porter Airlines flights
United Airlines	PriceFrom $165	Free Cancellation	Rating 7.4 9,011 reviews	Search United Airlines flights
American Airlines	PriceFrom $196	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
WestJet	PriceFrom $208	Free Cancellation	Rating 7.2 3,156 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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Popular cities in Illinois

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Cheap flights from Ontario to Illinois from $124

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 3/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

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Trusted and free

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Find the cheapest flights from Ontario to Illinois

Cheap round-trip flights

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American Airlines flights from Region of Ontario to Illinois

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

Air Canada flights from Region of Ontario to Illinois

Our best Air Canada 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 $431. Flights in the afternoon are often more expensive with an average ticket price of $626.

What is the cheapest Ontario to Illinois flight route?

Fly from Toronto Pearson Intl to Chicago O'Hare Intl 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?

American Airlines, Porter Airlines, and Air Canada 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 November 2025, there are 91 flights per day flying from Region of Ontario to Illinois. The most common time of day flights depart is 11:00AM, with 48% of flights taking off at noon.

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

As of November 2025, there are 638 flights per week flying from Region of Ontario to Illinois. The most common day of the week flights depart is Fri, with 16% 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