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Cheap flights from Illinois to Ontario from $55

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 2/10. 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.
American Airlines Logo
6:40 pm - 9:29 pm
ORD
-
YYZ
1h 49mnonstop
American Airlines Logo
11:38 am - 12:33 pm
YYZ
-
ORD
1h 55mnonstop
$185American Airlines
Thu, Feb 19 - Sun, Feb 22
Porter Airlines Logo
12:45 pm - 3:27 pm
MDW
-
YTZ
1h 42mnonstop
Porter Airlines Logo
11:00 am - 11:50 am
YTZ
-
MDW
1h 50mnonstop
$186Porter Airlines
Sat, Jan 31 - Sat, Feb 7
United Airlines Logo
6:28 pm - 9:21 pm
ORD
-
YYZ
1h 53mnonstop
United Airlines Logo
9:00 pm - 10:04 pm
YYZ
-
ORD
2h 04mnonstop
$189United Airlines
Fri, Feb 13 - Wed, Feb 18
Multiple Airlines Logo
7:00 am - 11:54 pm
ORD
-
YYZ
15h 54m1 stop
Multiple Airlines Logo
12:15 pm - 9:03 pm
YYZ
-
ORD
33h 48m3 stops
$190Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Air Canada Logo
8:00 am - 10:40 am
ORD
-
YYZ
1h 40mnonstop
Air Canada Logo
2:15 pm - 3:10 pm
YYZ
-
ORD
1h 55mnonstop
$192Air Canada
Sat, Jan 31 - Sat, Feb 7
Air Canada Logo
8:40 pm - 11:19 pm
ORD
-
YYZ
1h 39mnonstop
Air Canada Logo
6:15 am - 11:06 am
YYZ
-
ORD
5h 51m1 stop
$193Air Canada
Sun, Feb 1 - Sat, Feb 7
Multiple Airlines Logo
4:15 pm - 6:57 pm
MDW
-
YTZ
1h 42mnonstop
Multiple Airlines Logo
2:30 pm - 3:20 pm
YTZ
-
MDW
1h 50mnonstop
$198Multiple Airlines
Sun, Feb 1 - Sun, Feb 8
United Airlines Logo
3:50 pm - 9:42 pm
ORD
-
YUL
4h 52m1 stop
United Airlines Logo
4:45 pm - 6:45 pm
YUL
-
ORD
3h 00mnonstop
$202United Airlines
Sat, Feb 14 - Sat, Feb 21
Delta Logo
9:33 am - 4:12 pm
MDW
-
YYZ
5h 39m1 stop
Delta Logo
7:45 am - 12:46 pm
YYZ
-
MDW
6h 01m1 stop
$234Delta
Thu, Feb 5 - Mon, Feb 9
Delta Logo
1:31 pm - 11:12 pm
MDW
-
YUL
8h 41m1 stop
Delta Logo
6:00 am - 12:46 pm
YUL
-
MDW
7h 46m1 stop
$237Delta
Wed, Feb 4 - Mon, Feb 9

American Airlines flights from Illinois to Region of Ontario

Our best American Airlines deals on Illinois to Region of Ontario flight tickets
American Airlines
Feb 19
ORD6:40 pmChicago O'Hare Intl
1h 49m
YYZ9:29 pmToronto Pearson Intl
Feb 22
YYZ11:38 amToronto Pearson Intl
1h 55m
ORD12:33 pmChicago O'Hare Intl
$185
Find similar
American Airlines
Feb 5
ORD8:12 amChicago O'Hare Intl
8h 28m
1 stop
YYZ5:40 pmToronto Pearson Intl
Feb 8
YYZ1:14 pmToronto Pearson Intl
2h 00m
ORD2:14 pmChicago O'Hare Intl
$195
Find similar
American Airlines
Feb 19
ORD6:40 amChicago O'Hare Intl
9h 48m
1 stop
YYZ5:28 pmToronto Pearson Intl
Feb 22
YYZ11:38 amToronto Pearson Intl
1h 55m
ORD12:33 pmChicago O'Hare Intl
$197
Find similar

United Airlines flights from Illinois to Region of Ontario

Our best United Airlines deals on Illinois to Region of Ontario flight tickets
United Airlines
Feb 13
ORD6:28 pmChicago O'Hare Intl
1h 53m
YYZ9:21 pmToronto Pearson Intl
Feb 16
YYZ8:45 amToronto Pearson Intl
2h 05m
ORD9:50 amChicago O'Hare Intl
$189
Find similar
United Airlines
Feb 14
ORD3:50 pmChicago O'Hare Intl
4h 52m
1 stop
YUL9:42 pmMontreal Pierre Elliott Trudeau Intl
Feb 21
YUL4:45 pmMontreal Pierre Elliott Trudeau Intl
3h 00m
ORD6:45 pmChicago O'Hare Intl
$202
Find similar
United Airlines
Feb 7
ORD7:10 amChicago O'Hare Intl
5h 18m
1 stop
YUL1:28 pmMontreal Pierre Elliott Trudeau Intl
Feb 11
YUL7:00 amMontreal Pierre Elliott Trudeau Intl
6h 05m
1 stop
ORD12:05 pmChicago O'Hare Intl
$207
Find similar

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 December 18, 2025.
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

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 2/19

6:40 pm-9:29 pm

Nonstop1h 49m

Toronto Pearson Intl

Sun 2/22

11:38 am-12:33 pm

Nonstop1h 55m

$185

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sat 1/31

12:45 pm-3:27 pm

Nonstop1h 42m

Toronto Island

Sat 2/7

11:00 am-11:50 am

Nonstop1h 50m

$186

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 2/13

6:28 pm-9:21 pm

Nonstop1h 53m

Toronto Pearson Intl

Wed 2/18

9:00 pm-10:04 pm

Nonstop2h 04m

$189

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 1/30

7:00 am-11:54 pm

1 stop15h 54m

Toronto Pearson Intl

Fri 2/6

12:15 pm-9:03 pm

3 stops33h 48m

$190

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Sat 1/31

8:00 am-10:40 am

Nonstop1h 40m

Toronto Pearson Intl

Sat 2/7

2:15 pm-3:10 pm

Nonstop1h 55m

$192

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Sun 2/1

8:40 pm-11:19 pm

Nonstop1h 39m

Toronto Pearson Intl

Sat 2/7

6:15 am-11:06 am

1 stop5h 51m

$193

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Sun 2/1

4:15 pm-6:57 pm

Nonstop1h 42m

Toronto Island

Sun 2/8

2:30 pm-3:20 pm

Nonstop1h 50m

$198

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Sat 2/14

3:50 pm-9:42 pm

1 stop4h 52m

Montreal Pierre Elliott Trudeau Intl

Sat 2/21

4:45 pm-6:45 pm

Nonstop3h 00m

$202

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Thu 2/5

9:33 am-4:12 pm

1 stop5h 39m

Toronto Pearson Intl

Mon 2/9

7:45 am-12:46 pm

1 stop6h 01m

$234

ChicagoMontreal

MDW - YUL

MDWYUL

Chicago Midway

Wed 2/4

1:31 pm-11:12 pm

1 stop8h 41m

Montreal Pierre Elliott Trudeau Intl

Mon 2/9

6:00 am-12:46 pm

1 stop7h 46m

$237

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 $209. 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 $234.

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 $567. 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 $760. 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 $565. 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 $752.

What is the cheapest Illinois to Ontario flight route?

Fly from Chicago O'Hare Intl to Toronto Pearson Intl 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 $297 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

$126

Fastest flight time

1h 39m

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 $126. 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 39m
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
Air CanadaPriceFrom $116Free CancellationRating
7.1
10,534 reviews
Search Air Canada flights
United AirlinesPriceFrom $146Free CancellationRating
7.4
9,093 reviews
Search United Airlines flights
Porter AirlinesPriceFrom $185Free CancellationRating
8.0
399 reviews
Search Porter Airlines flights
American AirlinesPriceFrom $215Free CancellationRating
7.2
11,055 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.

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