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Cheap flights from Illinois to Ontario from $71

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 3/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Illinois to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
Porter Airlines Logo
11:05 am - 1:47 pm
MDW
-
YTZ
1h 42mnonstop
Porter Airlines Logo
2:30 pm - 3:20 pm
YTZ
-
MDW
1h 50mnonstop
$181Porter Airlines
Thu, Feb 26 - Sun, Mar 1
Porter Airlines Logo
11:05 am - 1:47 pm
MDW
-
YTZ
1h 42mnonstop
Porter Airlines Logo
2:30 pm - 3:20 pm
YTZ
-
MDW
1h 50mnonstop
$182Porter Airlines
Thu, Feb 26 - Sun, Mar 1
Air Canada Logo
7:25 am - 10:06 am
ORD
-
YTZ
1h 41mnonstop
Air Canada Logo
7:20 pm - 8:16 pm
YTZ
-
ORD
1h 56mnonstop
$187Air Canada
Tue, Jun 2 - Sun, Jun 7
Air Canada Logo
7:25 am - 10:06 am
ORD
-
YTZ
1h 41mnonstop
Air Canada Logo
7:20 pm - 8:16 pm
YTZ
-
ORD
1h 56mnonstop
$191Air Canada
Tue, Jun 2 - Sun, Jun 7
United Airlines Logo
7:13 am - 10:40 am
ORD
-
YUL
2h 27mnonstop
United Airlines Logo
6:10 am - 8:00 am
YUL
-
ORD
2h 50mnonstop
$204United Airlines
Thu, Apr 9 - Sun, Apr 12
United Airlines Logo
1:00 pm - 12:13 am
ORD
-
YUL
10h 13m
1 stop
United Airlines Logo
4:55 pm - 6:47 pm
YUL
-
ORD
2h 52mnonstop
$214United Airlines
Thu, Apr 9 - Mon, Apr 13
American Airlines Logo
8:18 am - 11:44 am
ORD
-
YUL
2h 26mnonstop
American Airlines Logo
7:45 am - 11:58 pm
YUL
-
ORD
17h 13m
1 stop
$220American Airlines
Tue, Apr 14 - Sat, Apr 18
American Airlines Logo
8:18 am - 11:44 am
ORD
-
YUL
2h 26mnonstop
American Airlines Logo
4:16 pm - 9:35 pm
YUL
-
ORD
6h 19m
1 stop
$236American Airlines
Tue, Apr 7 - Tue, Apr 14
Delta Logo
9:35 am - 5:17 pm
MDW
-
YYZ
6h 42m
1 stop
Delta Logo
10:05 am - 12:29 pm
YYZ
-
MDW
3h 24m
1 stop
$261Delta
Wed, Mar 18 - Sun, Mar 22
Delta Logo
1:28 pm - 10:40 pm
MDW
-
YYZ
8h 12m
1 stop
Delta Logo
6:20 am - 8:53 am
YYZ
-
MDW
3h 33m
1 stop
$331Delta
Sun, Feb 22 - Sun, Mar 29

Delta flights from Illinois to Region of Ontario

Our best Delta deals on Illinois to Region of Ontario flight tickets
Delta
Mar 14
MDW2:05 pmChicago Midway
8h 35m
1 stop
YUL11:40 pmMontreal Pierre Elliott Trudeau Intl
Mar 17
YUL7:00 amMontreal Pierre Elliott Trudeau Intl
6h 02m
1 stop
MDW12:02 pmChicago Midway
$238
Delta
Mar 18
MDW9:35 amChicago Midway
6h 42m
1 stop
YYZ5:17 pmToronto Pearson Intl
Mar 23
YYZ6:20 amToronto Pearson Intl
3h 33m
1 stop
MDW8:53 amChicago Midway
$261
Delta
Feb 12
MDW10:49 amChicago Midway
5h 04m
1 stop
YUL4:53 pmMontreal Pierre Elliott Trudeau Intl
Feb 25
YUL6:00 amMontreal Pierre Elliott Trudeau Intl
7h 46m
1 stop
MDW12:46 pmChicago Midway
$457

American Airlines flights from Illinois to Region of Ontario

Our best American Airlines deals on Illinois to Region of Ontario flight tickets
American Airlines
Apr 14
ORD8:18 amChicago O'Hare Intl
2h 26m
YUL11:44 amMontreal Pierre Elliott Trudeau Intl
Apr 18
YUL7:45 amMontreal Pierre Elliott Trudeau Intl
17h 13m
1 stop
ORD11:58 pmChicago O'Hare Intl
$220
American Airlines
Apr 7
ORD8:18 amChicago O'Hare Intl
2h 26m
YUL11:44 amMontreal Pierre Elliott Trudeau Intl
Apr 14
YUL4:16 pmMontreal Pierre Elliott Trudeau Intl
6h 19m
1 stop
ORD9:35 pmChicago O'Hare Intl
$236
American Airlines
Mar 31
ORD9:48 amChicago O'Hare Intl
5h 53m
1 stop
YYZ4:41 pmToronto Pearson Intl
Apr 4
YYZ11:40 amToronto Pearson Intl
1h 55m
ORD12:35 pmChicago O'Hare Intl
$245

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Region of Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 5, 2026.
Use the filters below to find and compare flights from Illinois to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 2/26

11:05 am-1:47 pm

Nonstop1h 42m

Toronto Island

Sun 3/1

2:30 pm-3:20 pm

Nonstop1h 50m

$181

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 2/26

11:05 am-1:47 pm

Nonstop1h 42m

Toronto Island

Sun 3/1

2:30 pm-3:20 pm

Nonstop1h 50m

$182

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Tue 6/2

7:25 am-10:06 am

Nonstop1h 41m

Toronto Island

Sun 6/7

7:20 pm-8:16 pm

Nonstop1h 56m

$187

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Tue 6/2

7:25 am-10:06 am

Nonstop1h 41m

Toronto Island

Sun 6/7

7:20 pm-8:16 pm

Nonstop1h 56m

$191

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Thu 4/9

7:13 am-10:40 am

Nonstop2h 27m

Montreal Pierre Elliott Trudeau Intl

Sun 4/12

6:10 am-8:00 am

Nonstop2h 50m

$204

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Thu 4/9

1:00 pm-12:13 am

1 stop10h 13m

Montreal Pierre Elliott Trudeau Intl

Mon 4/13

4:55 pm-6:47 pm

Nonstop2h 52m

$214

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Tue 4/14

8:18 am-11:44 am

Nonstop2h 26m

Montreal Pierre Elliott Trudeau Intl

Sat 4/18

7:45 am-11:58 pm

1 stop17h 13m

$220

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Tue 4/7

8:18 am-11:44 am

Nonstop2h 26m

Montreal Pierre Elliott Trudeau Intl

Tue 4/14

4:16 pm-9:35 pm

1 stop6h 19m

$236

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Wed 3/18

9:35 am-5:17 pm

1 stop6h 42m

Toronto Pearson Intl

Sun 3/22

10:05 am-12:29 pm

1 stop3h 24m

$261

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Sun 2/22

1:28 pm-10:40 pm

1 stop8h 12m

Toronto Pearson Intl

Sun 3/29

6:20 am-8:53 am

1 stop3h 33m

$331

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ontario from

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

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

The month of September is, on average, the cheapest month to fly to Region of Ontario from Illinois, with most prices found around $210. If you aren’t able to travel during the month of September, then book flights to Region of Ontario from Illinois during July instead. Flights to Region of Ontario in July, while not as cheap as those in September, still average around $235.

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 $528. 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 Sunday will generally be more expensive and average around $750. 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 evening. momondo users have found flights departing from Illinois to Region of Ontario in the evening for as low as $442. 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 $742.

What is the cheapest Illinois to Ontario flight route?

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

How far in advance should I book a flight to Region of 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 $290 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 $152 on momondo.

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

There are 4 cabin classes available to choose from on Illinois to 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

$140

Fastest flight time

1h 40m

Direct flights

Every day

Airports in Region of Ontario

123 airports
The best one-way flight to Region of Ontario from Illinois in the past 72 hours is $140. The best round-trip flight deal from Illinois to Region of Ontario found on momondo in the last 72 hours is $215.
The fastest flight from Illinois to Region of Ontario takes 1h 40m
Direct flights go from Illinois to Region of Ontario every day.
There are 123 airports in Region of Ontario. From Illinois there are direct flights to Toronto Pearson Intl (YYZ), Toronto Island (YTZ).
Search flight deals

  • 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?

  • 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?

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
DeltaPriceFrom $88Free CancellationRating
7.9
8,153 reviews
Search Delta flights
Air CanadaPriceFrom $100Free CancellationRating
7.1
10,694 reviews
Search Air Canada flights
Porter AirlinesPriceFrom $109Free CancellationRating
7.9
412 reviews
Search Porter Airlines flights
United AirlinesPriceFrom $140Free CancellationRating
7.4
9,241 reviews
Search United Airlines flights
American AirlinesPriceFrom $216Free CancellationRating
7.2
11,237 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

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