What airlines fly to Region of Ontario?

United Airlines, Air Canada and American Airlines are the top three most popular airlines that fly to Region of Ontario from Illinois according to our data. United Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 7 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

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

Average flight duration from Illinois to Region of Ontario depends on which airport you fly into and out of. Flying from Chicago to Toronto Pearson Intl Airport is 2h 20m on average, while flying from Moline to Toronto Pearson Intl Airport is 5h 10m on average. Toronto Pearson Intl Airport is the most popular airport in Region of Ontario.

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

United Airlines, Delta, and Porter Airlines are the most popular carriers operating from Illinois to Ontario

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

As of August 2026, there are 798 flights per week flying from Illinois to Region of Ontario. The most common day of the week flights depart is Fri, with 16% of flights taking off on this day.

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

As of August 2026, there are 114 flights per day flying from Illinois to Region of Ontario. The most common time of day flights depart is 8:00PM, with 42% of flights taking off at noon.

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

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

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

As of August 2026, there are 7 operators available to choose from for flights from Illinois to Ontario.

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

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 Illinois to Ontario.

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

The required travel and health documents for your Ontario 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 Ontario. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$104 Cheap Flights from Illinois to Ontario in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Ontario

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:45 am - 1:58 pmORD Chicago O'Hare Intl-YOW Ottawa

4h 13m1 stop Montreal Pierre Elliott Trudeau Intl

5:20 pm - 8:41 pmYOW Ottawa-ORD Chicago O'Hare Intl

4h 21m1 stop Toronto Island

$196Air Canada

Sat, Sep 12 - Sat, Sep 12

3:15 pm - 5:55 pmMDW Chicago Midway-YTZ Toronto Island

1h 40mnonstop

1:45 pm - 2:35 pmYTZ Toronto Island-MDW Chicago Midway

1h 50mnonstop

$233Porter Airlines

Mon, Aug 31 - Mon, Sep 14

3:20 pm - 6:00 pmMDW Chicago Midway-YTZ Toronto Island

1h 40mnonstop

10:10 am - 11:00 amYTZ Toronto Island-MDW Chicago Midway

1h 50mnonstop

$233Porter Airlines

Tue, Sep 1 - Thu, Sep 17

11:45 am - 2:25 pmMDW Chicago Midway-YTZ Toronto Island

1h 40mnonstop

10:10 am - 11:00 amYTZ Toronto Island-MDW Chicago Midway

1h 50mnonstop

$233Multiple Airlines

Wed, Sep 16 - Fri, Sep 18

2:15 pm - 5:01 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 46mnonstop

8:50 am - 9:53 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 03mnonstop

$234Air Canada

Thu, Sep 10 - Mon, Sep 14

10:43 am - 1:42 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 59mnonstop

7:00 am - 8:00 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 00mnonstop

$244Lufthansa

Thu, Sep 10 - Sun, Sep 13

6:30 am - 2:19 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

6h 49m1 stop Washington, D.C. Dulles Intl

5:45 pm - 6:51 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 06mnonstop

$250United Airlines

Sat, Sep 12 - Sat, Sep 12

5:00 am - 1:47 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

7h 47m1 stop Newark

5:15 pm - 6:30 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 15mnonstop

$250United Airlines

Wed, Sep 30 - Wed, Sep 30

8:30 pm - 11:26 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 56mnonstop

7:15 pm - 8:20 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mnonstop

$254American Airlines

Sat, Sep 12 - Wed, Sep 16

2:51 pm - 5:44 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 53mnonstop

6:30 am - 7:40 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 10mnonstop

$254American Airlines

Tue, Sep 15 - Wed, Sep 16

Cheap last minute flights

Enter your travel dates to find the best prices.

3:15 pm - 5:55 pmMDW Chicago Midway-YTZ Toronto Island

1h 40mnonstop

1:45 pm - 2:35 pmYTZ Toronto Island-MDW Chicago Midway

1h 50mnonstop

$333Porter Airlines

Mon, Aug 17 - Tue, Aug 25

3:15 pm - 5:55 pmMDW Chicago Midway-YTZ Toronto Island

1h 40mnonstop

1:45 pm - 2:35 pmYTZ Toronto Island-MDW Chicago Midway

1h 50mnonstop

$333Porter Airlines

Mon, Aug 17 - Thu, Aug 20

2:00 pm - 4:53 pmORD Chicago O'Hare Intl-YTZ Toronto Island

1h 53mnonstop

12:15 pm - 1:21 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

2h 06mnonstop

$349Air Canada

Wed, Aug 19 - Wed, Sep 16

7:25 am - 10:18 amORD Chicago O'Hare Intl-YTZ Toronto Island

1h 53mnonstop

10:45 am - 2:52 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

5h 07m1 stop Montreal Pierre Elliott Trudeau Intl

$358Air Canada

Wed, Aug 19 - Wed, Sep 16

6:59 am - 11:19 amORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

3h 20m1 stop Detroit Metropolitan Wayne County

12:08 pm - 4:13 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

5h 05m1 stop Detroit Metropolitan Wayne County

$403Delta

Wed, Aug 19 - Wed, Sep 16

8:48 am - 3:20 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

5h 32m1 stop Detroit Metropolitan Wayne County

12:08 pm - 4:13 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

5h 05m1 stop Detroit Metropolitan Wayne County

$403Delta

Wed, Aug 19 - Wed, Sep 23

3:40 pm - 6:30 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 50mnonstop

7:20 am - 8:30 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 10mnonstop

$420Qantas Airways

Mon, Aug 17 - Wed, Aug 19

3:40 pm - 6:30 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 50mnonstop

7:20 am - 8:30 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 10mnonstop

$420Qantas Airways

Tue, Aug 18 - Thu, Aug 20

3:25 pm - 9:38 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

5h 13m1 stop Philadelphia

6:30 am - 7:40 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 10mnonstop

$426American Airlines

Wed, Aug 19 - Wed, Sep 16

5:05 pm - 11:46 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

5h 41m1 stop Philadelphia

6:30 am - 7:40 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 10mnonstop

$478American Airlines

Sun, Aug 16 - Tue, Sep 15

Cheap direct flights

Enter your travel dates to find the best prices.

3:15 pm - 5:55 pmMDW Chicago Midway-YTZ Toronto Island

1h 40mnonstop

1:45 pm - 2:35 pmYTZ Toronto Island-MDW Chicago Midway

1h 50mnonstop

$233Porter Airlines

Mon, Aug 31 - Mon, Sep 14

3:20 pm - 6:00 pmMDW Chicago Midway-YTZ Toronto Island

1h 40mnonstop

10:10 am - 11:00 amYTZ Toronto Island-MDW Chicago Midway

1h 50mnonstop

$233Porter Airlines

Tue, Sep 1 - Thu, Sep 17

11:45 am - 2:25 pmMDW Chicago Midway-YTZ Toronto Island

1h 40mnonstop

10:10 am - 11:00 amYTZ Toronto Island-MDW Chicago Midway

1h 50mnonstop

$233Multiple Airlines

Wed, Sep 16 - Fri, Sep 18

2:15 pm - 5:01 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 46mnonstop

8:50 am - 9:53 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 03mnonstop

$234Air Canada

Thu, Sep 10 - Mon, Sep 14

7:25 am - 10:07 amORD Chicago O'Hare Intl-YTZ Toronto Island

1h 42mnonstop

7:35 pm - 8:41 pmYTZ Toronto Island-ORD Chicago O'Hare Intl

2h 06mnonstop

$235Air Canada

Thu, Sep 10 - Sun, Sep 13

10:43 am - 1:42 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 59mnonstop

7:00 am - 8:00 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 00mnonstop

$244Lufthansa

Thu, Sep 10 - Sun, Sep 13

5:53 pm - 8:44 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 51mnonstop

7:00 am - 8:00 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 00mnonstop

$254United Airlines

Mon, Sep 21 - Wed, Sep 30

5:53 pm - 8:44 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 51mnonstop

7:00 am - 8:00 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 00mnonstop

$254United Airlines

Sun, Sep 27 - Wed, Sep 30

8:30 pm - 11:26 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 56mnonstop

7:15 pm - 8:20 pmYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 05mnonstop

$254American Airlines

Sat, Sep 12 - Wed, Sep 16

2:51 pm - 5:44 pmORD Chicago O'Hare Intl-YYZ Toronto Pearson Intl

1h 53mnonstop

6:30 am - 7:40 amYYZ Toronto Pearson Intl-ORD Chicago O'Hare Intl

2h 10mnonstop

$254American Airlines

Tue, Sep 15 - Wed, Sep 16

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

United Airlines flights from Illinois to Region of Ontario

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

United Airlines

Sep 24

ORD5:53 pmChicago O'Hare Intl

1h 51m

YYZ8:44 pmToronto Pearson Intl

Sep 30

YYZ7:00 amToronto Pearson Intl

2h 00m

ORD8:00 amChicago O'Hare Intl

$254

United Airlines

Sep 18

ORD12:59 pmChicago O'Hare Intl

1h 47m

YYZ3:46 pmToronto Pearson Intl

Sep 18

YYZ7:00 pmToronto Pearson Intl

6h 28m

1 stop

ORD12:28 amChicago O'Hare Intl

$256

United Airlines

Sep 11

ORD2:52 pmChicago O'Hare Intl

2h 04m

YYZ5:56 pmToronto Pearson Intl

Sep 11

YYZ9:00 pmToronto Pearson Intl

2h 05m

ORD10:05 pmChicago O'Hare Intl

$264

American Airlines flights from Illinois to Region of Ontario

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

American Airlines

Sep 25

ORD4:54 pmChicago O'Hare Intl

5h 52m

1 stop

YYZ11:46 pmToronto Pearson Intl

Sep 27

YYZ6:30 amToronto Pearson Intl

2h 10m

ORD7:40 amChicago O'Hare Intl

$263

American Airlines

Sep 24

ORD8:30 pmChicago O'Hare Intl

1h 56m

YYZ11:26 pmToronto Pearson Intl

Sep 26

YYZ5:45 pmToronto Pearson Intl

7h 16m

1 stop

ORD12:01 amChicago O'Hare Intl

$269

American Airlines

Aug 29

ORD3:40 pmChicago O'Hare Intl

1h 50m

YYZ6:30 pmToronto Pearson Intl

Sep 3

YYZ1:15 pmToronto Pearson Intl

2h 05m

ORD2:20 pmChicago O'Hare Intl

$322

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoOttawa

ORD Chicago O'Hare Intl - YOW Ottawa

ORDYOW

Chicago O'Hare Intl

Sat 9/12

8:45 am-1:58 pm

1 stop4h 13m

Ottawa

Sat 9/12

5:20 pm-8:41 pm

1 stop4h 21m

$196

Quickest round-trip

ChicagoToronto

MDW Chicago Midway - YTZ Toronto Island

MDWYTZ

Chicago Midway

Mon 8/31

3:15 pm-5:55 pm

Nonstop1h 40m

Toronto Island

Mon 9/14

1:45 pm-2:35 pm

Nonstop1h 50m

$233

ChicagoToronto

MDW Chicago Midway - YTZ Toronto Island

MDWYTZ

Chicago Midway

Tue 9/1

3:20 pm-6:00 pm

Nonstop1h 40m

Toronto Island

Thu 9/17

10:10 am-11:00 am

Nonstop1h 50m

$233

ChicagoToronto

MDW Chicago Midway - YTZ Toronto Island

MDWYTZ

Chicago Midway

Wed 9/16

11:45 am-2:25 pm

Nonstop1h 40m

Toronto Island

Fri 9/18

10:10 am-11:00 am

Nonstop1h 50m

$233

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Thu 9/10

2:15 pm-5:01 pm

Nonstop1h 46m

Toronto Pearson Intl

Mon 9/14

8:50 am-9:53 am

Nonstop2h 03m

$234

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Thu 9/10

10:43 am-1:42 pm

Nonstop1h 59m

Toronto Pearson Intl

Sun 9/13

7:00 am-8:00 am

Nonstop2h 00m

$244

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Sat 9/12

6:30 am-2:19 pm

1 stop6h 49m

Toronto Pearson Intl

Sat 9/12

5:45 pm-6:51 pm

Nonstop2h 06m

$250

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Wed 9/30

5:00 am-1:47 pm

1 stop7h 47m

Toronto Pearson Intl

Wed 9/30

5:15 pm-6:30 pm

Nonstop2h 15m

$250

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Sat 9/12

8:30 pm-11:26 pm

Nonstop1h 56m

Toronto Pearson Intl

Wed 9/16

7:15 pm-8:20 pm

Nonstop2h 05m

$254

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Tue 9/15

2:51 pm-5:44 pm

Nonstop1h 53m

Toronto Pearson Intl

Wed 9/16

6:30 am-7:40 am

Nonstop2h 10m

$254

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 Illinois to Region of Ontario

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 Region of Ontario?

The month of February is, on average, the cheapest month to fly to Region of Ontario from Illinois, with most prices found around $285. If you aren’t able to travel during the month of February, then book flights to Region of Ontario from Illinois during November instead. Flights to Region of Ontario in November, while not as cheap as those in February, still average around $299.

What is the cheapest day to depart on your flight to Region of Ontario?

According to our data, Thursday is the cheapest day to fly to Region of Ontario from Illinois. The lowest ticket price found for a Thursday departure recently was $415. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Illinois to Region of Ontario on a Monday will generally be more expensive and average around $649. 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 Region of Ontario?

According to our data, the cheapest time of day to fly to Region of Ontario is in the morning. momondo users have found flights departing from Illinois to Region of Ontario in the morning for as low as $436. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $780.

What is the cheapest Illinois to Ontario flight route?

Fly from Chicago O'Hare Intl to Toronto Island for the best Illinois - Ontario flight prices

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

You are more likely to see cheaper flights to Region of Ontario from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $334 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from Illinois for as low as $272 on momondo.

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

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

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

Cheap Illinois to Region of Ontario flight deals and tips

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

Best Price Found	$111
Fastest flight time	1h 37m
Direct flights	Every day
Airports in Region of Ontario	125 airports

The best one-way flight to Region of Ontario from Illinois in the past 72 hours is $111. The best round-trip flight deal from Illinois to Region of Ontario found on momondo in the last 72 hours is $243.

The fastest flight from Illinois to Region of Ontario takes 1h 37m

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

There are 125 airports in Region of Ontario. From Illinois there are direct flights to Toronto Pearson Intl (YYZ), Toronto Island (YTZ).

Search flight deals

Frequently asked questions about flying from Illinois to Ontario

When did momondo last update prices for flights from Illinois to Ontario?
Prices for flights from Illinois to Ontario were last updated today.
How many operators does momondo search for flights from Illinois to Ontario?
As of August 2026, there are 7 operators available to choose from for flights from Illinois to Ontario.
How old do you have to be to fly from Illinois to Ontario?
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 Illinois to Ontario.
What documentation or ID do you need to fly to Ontario?
The required travel and health documents for your Ontario 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 Ontario. 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 Illinois to Region of Ontario?
momondo data reveals that the most frequently booked plane model on the route from Illinois to Region of Ontario is De Havilland (Bombardier) DHC-8-400 Dash 8Q, representing 21.13% of all bookings. The subsequent popular models are Embraer 175 at 12.54%, Boeing 787-8 Dreamliner at 10.96%, and Embraer 175 (Enhanced Winglets) at 6.90%.

Best airlines flying from Illinois to Region of Ontario

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $88	Free Cancellation	Rating 7.8 8,509 reviews	Search Delta flights
Air Canada	PriceFrom $121	Free Cancellation	Rating 7.1 11,478 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $160	Free Cancellation	Rating 7.5 1,081 reviews	Search Qantas Airways flights
WestJet	PriceFrom $170	Free Cancellation	Rating 7.2 3,432 reviews	Search WestJet flights
Porter Airlines	PriceFrom $179	Free Cancellation	Rating 8.0 456 reviews	Search Porter Airlines flights
United Airlines	PriceFrom $222	Free Cancellation	Rating 7.4 10,112 reviews	Search United Airlines flights
American Airlines	PriceFrom $223	Free Cancellation	Rating 7.1 11,940 reviews	Search American Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Illinois.

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

Yes. All flights to Ontario from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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 Illinois to Ontario.

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

Yes. momondo can track prices for Illinois to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Region of Ontario 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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Mon 9/14

Mon 9/21

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Ontario

Popular cities

Other flights from Illinois

Other flights to Ontario

Airlines

Complete your trip

Feeling lucky

Popular cities in Ontario

Flights to Torontofrom $168

Flights to Vancouverfrom $121

Flights to Montrealfrom $247

Flights to Calgaryfrom $200

Flights to Ottawafrom $250

Flights to Halifaxfrom $283

Flights to Winnipegfrom $263

Flights to Québec Cityfrom $339

Flights to Kelownafrom $246

Flights to St. John'sfrom $331

Flights to Saskatoonfrom $290

Flights to Reginafrom $309

Cheap flights from Illinois to Ontario from $104

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Ontario departing on 9/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Illinois to Ontario

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

United Airlines flights from Illinois to Region of Ontario

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

American Airlines flights from Illinois to Region of Ontario

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

momondo Fare Finder

Use the filters below to find and compare flights from Illinois to Ontario that are best for you.

See travel insights to Ontario from

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

What is the cheapest month to fly to Region of Ontario?

What is the cheapest day to depart on your flight to Region of Ontario?

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

What is the cheapest Illinois to Ontario flight route?

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

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

Can stopping save me money on Illinois to Region of Ontario flights?

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

What airlines fly to Region of Ontario?

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

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

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

Cheap Illinois to Region of Ontario flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Airports in Region of Ontario

Frequently asked questions about flying from Illinois to Ontario

Best airlines flying from Illinois to Region of Ontario

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

Why use momondo?

An easier way to manage your Region of Ontario 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 Ontario

Popular cities in Ontario

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

Illinois flight routes

According to popular flight searches on momondo this year

Region of Ontario flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Ontario

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Ontario

Explore popular destinations other users love

According to popular flight searches on momondo this year