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

523 flights are operational weekly from Chicago to Region of Ontario as of August 2025. The most popular departure day for this route is Mon, with 21% of flights per week taking off on this day.

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

Air Canada, United Airlines, and Porter Airlines are the most popular carriers operating from Chicago to Ontario

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

As of August 2025, 74 flights take off from Chicago and land in Region of Ontario each day. The most common flight departure time for this route is 8:00PM, with 38% of daily flights taking off at noon.

What airlines fly to Region of Ontario?

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Region of Ontario from Chicago according to our data. Air Canada is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 4 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Chicago to Ontario refresh daily.

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

There are 4 operators available for flights from Chicago to Ontario as of August 2025.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Ontario.

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

The necessary travel and health documents for your Ontario trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$58 Cheap Flights from Chicago to Ontario in 2025

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

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

Find the cheapest flights from Chicago to Ontario

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

1:19 pm - 4:02 pmORD-YYZ

1h 43mnonstop

6:52 am - 7:58 amYYZ-ORD

2h 06mnonstop

$167United Airlines

Find Deal

Fri, Nov 7 - Mon, Nov 10

8:25 pm - 11:08 pmORD-YYZ

1h 43mnonstop

2:10 pm - 3:04 pmYYZ-ORD

1h 54mnonstop

$173Air Canada

Find Deal

Wed, Oct 1 - Wed, Oct 8

9:55 am - 12:38 pmORD-YYZ

1h 43mnonstop

12:20 pm - 1:14 pmYYZ-ORD

1h 54mnonstop

$174Air Canada

Find Deal

Thu, Oct 2 - Sun, Oct 5

10:38 am - 2:00 pmORD-YUL

2h 22mnonstop

6:00 am - 8:00 amYUL-ORD

3h 00mnonstop

$181United Airlines

Find Deal

Tue, Nov 4 - Tue, Nov 18

9:35 am - 12:17 pmMDW-YTZ

1h 42mnonstop

7:50 am - 8:39 amYTZ-MDW

1h 49mnonstop

$193Porter Airlines

Find Deal

Wed, Oct 1 - Wed, Oct 8

5:20 pm - 8:02 pmMDW-YTZ

1h 42mnonstop

3:35 pm - 4:24 pmYTZ-MDW

1h 49mnonstop

$195Porter Airlines

Find Deal

Fri, Sep 12 - Thu, Sep 18

9:45 am - 12:35 pmORD-YYZ

1h 50mnonstop

7:10 pm - 11:40 pmYYZ-ORD

5h 30m1 stop

$208American Airlines

Find Deal

Thu, Oct 30 - Mon, Nov 3

6:04 am - 11:52 amORD-YYZ

4h 48m1 stop

12:34 pm - 8:25 pmYYZ-ORD

8h 51m1 stop

$210American Airlines

Find Deal

Thu, Nov 20 - Sun, Nov 23

9:35 am - 12:17 pmMDW-YTZ

1h 42mnonstop

3:35 pm - 4:24 pmYTZ-MDW

1h 49mnonstop

$241Air Transat

Find Deal

Thu, Oct 2 - Sun, Oct 5

9:35 am - 12:17 pmMDW-YTZ

1h 42mnonstop

7:50 am - 8:39 amYTZ-MDW

1h 49mnonstop

$246Air Transat

Find Deal

Thu, Sep 25 - Sat, Oct 25

United Airlines flights from Chicago to Region of Ontario

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

United Airlines

Nov 7

ORD1:19 pmChicago O'Hare Intl

1h 43m

YYZ4:02 pmToronto Pearson Intl

Nov 10

YYZ6:52 amToronto Pearson Intl

2h 06m

ORD7:58 amChicago O'Hare Intl

$167

Find similar

United Airlines

Nov 4

ORD10:38 amChicago O'Hare Intl

2h 22m

YUL2:00 pmMontreal Pierre Elliott Trudeau Intl

Nov 18

YUL6:00 amMontreal Pierre Elliott Trudeau Intl

3h 00m

ORD8:00 amChicago O'Hare Intl

$181

Find similar

United Airlines

Nov 7

ORD7:10 amChicago O'Hare Intl

1h 48m

YYZ9:58 amToronto Pearson Intl

Nov 9

YYZ6:40 pmToronto Pearson Intl

5h 54m

1 stop

ORD11:34 pmChicago O'Hare Intl

$183

Find similar

American Airlines flights from Chicago to Region of Ontario

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

American Airlines

Oct 30

ORD9:45 amChicago O'Hare Intl

1h 50m

YYZ12:35 pmToronto Pearson Intl

Nov 3

YYZ7:10 pmToronto Pearson Intl

5h 30m

1 stop

ORD11:40 pmChicago O'Hare Intl

$208

Find similar

American Airlines

Nov 20

ORD6:04 amChicago O'Hare Intl

4h 48m

1 stop

YYZ11:52 amToronto Pearson Intl

Nov 23

YYZ12:34 pmToronto Pearson Intl

8h 51m

1 stop

ORD8:25 pmChicago O'Hare Intl

$210

Find similar

American Airlines

Oct 1

ORD8:15 amChicago O'Hare Intl

1h 44m

YYZ10:59 amToronto Pearson Intl

Oct 8

YYZ12:46 pmToronto Pearson Intl

9h 39m

1 stop

ORD9:25 pmChicago O'Hare Intl

$215

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 11/7

1:19 pm-4:02 pm

Nonstop1h 43m

Toronto Pearson Intl

Mon 11/10

6:52 am-7:58 am

Nonstop2h 06m

$167

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 10/1

8:25 pm-11:08 pm

Nonstop1h 43m

Toronto Pearson Intl

Wed 10/8

2:10 pm-3:04 pm

Nonstop1h 54m

$173

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 10/2

9:55 am-12:38 pm

Nonstop1h 43m

Toronto Pearson Intl

Sun 10/5

12:20 pm-1:14 pm

Nonstop1h 54m

$174

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Tue 11/4

10:38 am-2:00 pm

Nonstop2h 22m

Montreal Pierre Elliott Trudeau Intl

Tue 11/18

6:00 am-8:00 am

Nonstop3h 00m

$181

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Wed 10/1

9:35 am-12:17 pm

Nonstop1h 42m

Toronto Island

Wed 10/8

7:50 am-8:39 am

Nonstop1h 49m

$193

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 9/12

5:20 pm-8:02 pm

Nonstop1h 42m

Toronto Island

Thu 9/18

3:35 pm-4:24 pm

Nonstop1h 49m

$195

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 10/30

9:45 am-12:35 pm

Nonstop1h 50m

Toronto Pearson Intl

Mon 11/3

7:10 pm-11:40 pm

1 stop5h 30m

$208

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 11/20

6:04 am-11:52 am

1 stop4h 48m

Toronto Pearson Intl

Sun 11/23

12:34 pm-8:25 pm

1 stop8h 51m

$210

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 10/2

9:35 am-12:17 pm

Nonstop1h 42m

Toronto Island

Sun 10/5

3:35 pm-4:24 pm

Nonstop1h 49m

$241

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 9/25

9:35 am-12:17 pm

Nonstop1h 42m

Toronto Island

Sat 10/25

7:50 am-8:39 am

Nonstop1h 49m

$246

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 Chicago 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 July is, on average, the cheapest month to fly to Region of Ontario from Chicago, with most prices found around $234. If you aren’t able to travel during the month of July, then book flights to Region of Ontario from Chicago during June instead. Flights to Region of Ontario in June, while not as cheap as those in July, still average around $261.

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 Chicago. The lowest ticket price found for a Thursday departure recently was $619. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Chicago 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 Chicago to Region of Ontario in the morning for as low as $560. 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 $762.

What is the cheapest Chicago to Ontario flight route?

Fly from Chicago Midway to Toronto Island for the best Chicago - 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 Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $305 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 Chicago for as low as $166 on momondo.

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

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

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

Cheap Chicago to Region of Ontario flight deals and tips

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

Best Price Found	$58
Fastest flight time	1h 38m
Direct flights	Every day
Airports in Region of Ontario	3 airports

The best one-way flight to Region of Ontario from Chicago in the past 72 hours is $58. The best round-trip flight deal from Chicago to Region of Ontario found on momondo in the last 72 hours is $167.

The fastest flight from Chicago to Region of Ontario takes 1h 38m

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

There are 3 airports near Region of Ontario: Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Pearson Intl (YYZ), Toronto Island (YTZ)

Search flight deals

When did momondo last update prices for flights from Chicago to Ontario?
Prices for flights from Chicago to Ontario refresh daily.
How many operators does momondo search for flights from Chicago to Ontario?
There are 4 operators available for flights from Chicago to Ontario as of August 2025.
How old do you have to be to fly from Chicago to Ontario?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Ontario.
What documentation or ID do you need to fly to Ontario?
The necessary travel and health documents for your Ontario trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Chicago to Region of Ontario?
Based on momondo bookings for flights between Chicago and Region of Ontario, the leading plane model is De Havilland (Bombardier) DHC-8-400 Dash 8Q, making up 19.99% of the total bookings. Other popular models include Embraer 175 (Enhanced Winglets) with 19.02%, Embraer 175 with 12.75%, and Boeing 737-800 with 7.78%.

Best airlines flying from Chicago to Region of Ontario

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

Airline	Rating	Free Cancellation	Price
Air Canada	PriceFrom $120	Free Cancellation	Rating 7.1 9,992 reviews	Search Air Canada flights
United Airlines	PriceFrom $145	Free Cancellation	Rating 7.4 8,925 reviews	Search United Airlines flights
Porter Airlines	PriceFrom $187	Free Cancellation	Rating 8.0 333 reviews	Search Porter Airlines flights
American Airlines	PriceFrom $216	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Chicago to Ontario. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Chicago to Ontario flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Chicago and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of Chicago to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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

Sat 8/23

Sat 8/30

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 in Ontario

Flights to Torontofrom $97

Flights to Vancouverfrom $83

Flights to Montrealfrom $170

Flights to Calgaryfrom $139

Flights to Ottawafrom $196

Flights to Halifaxfrom $170

Flights to Winnipegfrom $180

Flights to Québec Cityfrom $153

Flights to Saskatoonfrom $129

Flights to Kelownafrom $190

Flights to St. John'sfrom $267

Flights to Reginafrom $242

Cheap flights from Chicago to Ontario from $58

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Ontario departing on 9/27. 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

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Chicago to Ontario

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

United Airlines flights from Chicago to Region of Ontario

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

American Airlines flights from Chicago to Region of Ontario

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

momondo Fare Finder

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

See travel insights to Ontario from

How to get the cheapest flight ticket from Chicago 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?

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 Chicago to Ontario flight route?

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

How far in advance should I book a flight to Region of Ontario?

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

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

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

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

Air Canada, United Airlines, and Porter Airlines are the most popular carriers operating from Chicago to Ontario

What airlines fly to Region of Ontario?

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

As of August 2025, 74 flights take off from Chicago and land in Region of Ontario each day. The most common flight departure time for this route is 8:00PM, with 38% of daily flights taking off at noon.

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

523 flights are operational weekly from Chicago to Region of Ontario as of August 2025. The most popular departure day for this route is Mon, with 21% of flights per week taking off on this day.

Cheap Chicago to Region of Ontario flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Region of Ontario

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

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

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

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

What is the most popular plane model from Chicago to Region of Ontario?

Best airlines flying from Chicago to Region of Ontario

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

Why use momondo?

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

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

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

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

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