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 44% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 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 week?

As of January 2026, there are 584 flights per week flying from Region of Ontario to Illinois. The most common day of the week flights depart is Thu, with 15% of flights taking off on this day.

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

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

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 Toronto (a popular airport in Region of Ontario) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 1h 55m on average. If you fly from Ottawa (another popular airport in Region of Ontario) to Chicago O'Hare Intl Airport, then the average flight time is 2h 08m.

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

As of January 2026, there are 83 flights per day flying from Region of Ontario to Illinois. The most common time of day flights depart is 6:00AM, with 50% of flights taking off at noon.

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 5 as of January 2026.

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.

$98 Cheap Flights from Ontario to Illinois in 2026

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Find the cheapest flights from Ontario to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 7:15 am

YYZ

ORD

2h 15mnonstop

6:00 am - 4:35 pm

ORD

YYZ

9h 35m1 stop

$184American Airlines

Thu, Feb 5 - Mon, Feb 9

11:00 am - 11:50 am

YTZ

MDW

1h 50mnonstop

12:45 pm - 3:27 pm

MDW

YTZ

1h 42mnonstop

$184Porter Airlines

Sat, Feb 21 - Sat, Feb 28

2:30 pm - 3:20 pm

YTZ

MDW

1h 50mnonstop

11:00 am - 1:42 pm

MDW

YTZ

1h 42mnonstop

$186Multiple Airlines

Sun, Feb 8 - Tue, Feb 10

9:00 am - 10:06 am

YYZ

ORD

2h 06mnonstop

6:28 pm - 9:21 pm

ORD

YYZ

1h 53mnonstop

$187Lufthansa

Thu, Feb 5 - Sun, Feb 8

4:45 pm - 6:51 pm

YUL

ORD

3h 06mnonstop

1:00 pm - 7:48 pm

ORD

YUL

5h 48m1 stop

$189United Airlines

Fri, Feb 6 - Mon, Feb 9

6:00 am - 8:05 am

YUL

ORD

3h 05mnonstop

5:52 pm - 9:17 pm

ORD

YUL

2h 25mnonstop

$190United Airlines

Fri, Feb 6 - Sun, Feb 8

7:00 am - 12:05 pm

YUL

ORD

6h 05m1 stop

5:52 pm - 9:17 pm

ORD

YUL

2h 25mnonstop

$191Lufthansa

Thu, Feb 5 - Sun, Feb 8

6:15 am - 11:06 am

YYZ

ORD

5h 51m1 stop

2:00 pm - 4:39 pm

ORD

YYZ

1h 39mnonstop

$194Air Canada

Thu, Feb 5 - Sun, Feb 8

7:00 am - 11:06 am

YYZ

ORD

5h 06m1 stop

2:00 pm - 4:39 pm

ORD

YYZ

1h 39mnonstop

$198Air Canada

Thu, Feb 5 - Sun, Feb 8

5:15 pm - 10:23 am

YYZ

STL

18h 08m1 stop

5:42 pm - 12:11 am

STL

YYZ

29h 29m1 stop

$237Multiple Airlines

Thu, Jan 22 - Sun, Jan 25

American Airlines flights from Region of Ontario to Illinois

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

American Airlines

Feb 5

YYZ6:00 amToronto Pearson Intl

2h 15m

ORD7:15 amChicago O'Hare Intl

Feb 9

ORD6:00 amChicago O'Hare Intl

9h 35m

1 stop

YYZ4:35 pmToronto Pearson Intl

$184

American Airlines

Feb 1

YYZ12:39 pmToronto Pearson Intl

8h 36m

1 stop

ORD8:15 pmChicago O'Hare Intl

Feb 8

ORD3:37 pmChicago O'Hare Intl

1h 43m

YYZ6:20 pmToronto Pearson Intl

$190

American Airlines

Feb 3

YUL3:50 pmMontreal Pierre Elliott Trudeau Intl

3h 00m

ORD5:50 pmChicago O'Hare Intl

Feb 10

ORD9:54 amChicago O'Hare Intl

4h 26m

1 stop

YUL3:20 pmMontreal Pierre Elliott Trudeau Intl

$199

Air Canada flights from Region of Ontario to Illinois

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

Air Canada

Feb 5

YYZ6:15 amToronto Pearson Intl

5h 51m

1 stop

ORD11:06 amChicago O'Hare Intl

Feb 8

ORD2:00 pmChicago O'Hare Intl

1h 39m

YYZ4:39 pmToronto Pearson Intl

$194

Air Canada

Feb 5

YYZ7:00 amToronto Pearson Intl

5h 06m

1 stop

ORD11:06 amChicago O'Hare Intl

Feb 8

ORD2:00 pmChicago O'Hare Intl

1h 39m

YYZ4:39 pmToronto Pearson Intl

$198

Air Canada

Feb 5

YYZ6:45 pmToronto Pearson Intl

2h 00m

ORD7:45 pmChicago O'Hare Intl

Feb 12

ORD8:40 pmChicago O'Hare Intl

1h 39m

YYZ11:19 pmToronto Pearson Intl

$199

Fly from

Fly to

Route

Depart

Return

Price

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 2/5

6:00 am-7:15 am

Nonstop2h 15m

Chicago O'Hare Intl

Mon 2/9

6:00 am-4:35 pm

1 stop9h 35m

$184

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Sat 2/21

11:00 am-11:50 am

Nonstop1h 50m

Chicago Midway

Sat 2/28

12:45 pm-3:27 pm

Nonstop1h 42m

$184

TorontoChicago

YTZ - MDW

YTZMDW

Toronto Island

Sun 2/8

2:30 pm-3:20 pm

Nonstop1h 50m

Chicago Midway

Tue 2/10

11:00 am-1:42 pm

Nonstop1h 42m

$186

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 2/5

9:00 am-10:06 am

Nonstop2h 06m

Chicago O'Hare Intl

Sun 2/8

6:28 pm-9:21 pm

Nonstop1h 53m

$187

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 2/6

4:45 pm-6:51 pm

Nonstop3h 06m

Chicago O'Hare Intl

Mon 2/9

1:00 pm-7:48 pm

1 stop5h 48m

$189

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Fri 2/6

6:00 am-8:05 am

Nonstop3h 05m

Chicago O'Hare Intl

Sun 2/8

5:52 pm-9:17 pm

Nonstop2h 25m

$190

MontrealChicago

YUL - ORD

YULORD

Montreal Pierre Elliott Trudeau Intl

Thu 2/5

7:00 am-12:05 pm

1 stop6h 05m

Chicago O'Hare Intl

Sun 2/8

5:52 pm-9:17 pm

Nonstop2h 25m

$191

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 2/5

6:15 am-11:06 am

1 stop5h 51m

Chicago O'Hare Intl

Sun 2/8

2:00 pm-4:39 pm

Nonstop1h 39m

$194

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 2/5

7:00 am-11:06 am

1 stop5h 06m

Chicago O'Hare Intl

Sun 2/8

2:00 pm-4:39 pm

Nonstop1h 39m

$198

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 1/22

5:15 pm-10:23 am

1 stop18h 08m

Lambert-St Louis

Sun 1/25

5:42 pm-12:11 am

1 stop29h 29m

$237

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 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 $729. 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 $368. Flights in the afternoon are often more expensive with an average ticket price of $668.

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 $287 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	$212
Fastest flight time	1h 49m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Region of Ontario in the past 72 hours is $212. The best round-trip flight deal from Region of Ontario to Illinois found on momondo in the last 72 hours is $216.

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

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

There are 98 airports in Illinois. From Region of Ontario there are direct flights to 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 5 as of January 2026.
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 14.36% of all bookings. The subsequent popular models are Embraer 175 (Enhanced Winglets) at 12.58%, Embraer 195 E2 at 10.84%, and Embraer 170 at 9.13%.

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 $149	Free Cancellation	Rating 7.1 10,603 reviews	Search Air Canada flights
Porter Airlines	PriceFrom $158	Free Cancellation	Rating 8.0 406 reviews	Search Porter Airlines flights
United Airlines	PriceFrom $165	Free Cancellation	Rating 7.4 9,141 reviews	Search United Airlines flights
American Airlines	PriceFrom $193	Free Cancellation	Rating 7.2 11,095 reviews	Search American Airlines 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.

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Popular cities in Illinois

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Cheap flights from Ontario to Illinois from $98

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 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.

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Find the cheapest flights from Ontario to Illinois

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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

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 $368. Flights in the afternoon are often more expensive with an average ticket price of $668.

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, Air Canada, and American Airlines 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 January 2026, there are 83 flights per day flying from Region of Ontario to Illinois. The most common time of day flights depart is 6:00AM, with 50% of flights taking off at noon.

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

As of January 2026, there are 584 flights per week flying from Region of Ontario to Illinois. The most common day of the week flights depart is Thu, 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