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

Porter Airlines, Delta, and American 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 June 2026, 114 flights take off from Chicago and land in Region of Ontario each day. The most common flight departure time for this route is 2:00PM, with 39% of daily flights taking off at noon.

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

804 flights are operational weekly from Chicago to Region of Ontario as of June 2026. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.

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 Chicago according to our data. United Airlines is the first choice among our users, with 45% 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.

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 7 operators available for flights from Chicago to Ontario as of June 2026.

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.

$96 Cheap Flights from Chicago to Ontario in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago to Ontario

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 9:40 am

ORD

YTZ

1h 40mnonstop

10:05 am - 11:00 am

YTZ

ORD

1h 55mnonstop

$216Porter Airlines

Wed, Sep 9 - Tue, Sep 15

10:25 am - 1:05 pm

MDW

YTZ

1h 40mnonstop

8:50 am - 9:40 am

YTZ

MDW

1h 50mnonstop

$217Porter Airlines

Thu, Jun 25 - Mon, Jun 29

7:00 am - 9:40 am

ORD

YTZ

1h 40mnonstop

8:40 pm - 9:35 pm

YTZ

ORD

1h 55mnonstop

$217Porter Airlines

Wed, Sep 9 - Wed, Sep 9

3:20 pm - 6:00 pm

MDW

YTZ

1h 40mnonstop

8:50 am - 9:40 am

YTZ

MDW

1h 50mnonstop

$218Porter Airlines

Fri, Jun 26 - Mon, Jun 29

7:25 am - 10:06 am

ORD

YTZ

1h 41mnonstop

12:15 pm - 1:10 pm

YTZ

ORD

1h 55mnonstop

$219Air Canada

Sat, Jun 27 - Mon, Jun 29

8:45 am - 3:50 pm

ORD

YTZ

6h 05m

1 stop

7:20 pm - 8:16 pm

YTZ

ORD

1h 56mnonstop

$221Air Canada

Wed, Sep 9 - Sat, Sep 12

5:59 pm - 10:57 pm

MDW

YYZ

3h 58m

1 stop

2:24 pm - 6:33 pm

YYZ

MDW

5h 09m

1 stop

$301Delta

Sat, Sep 12 - Mon, Sep 14

9:30 am - 1:34 pm

MDW

YYZ

3h 04m

1 stop

2:24 pm - 6:33 pm

YYZ

MDW

5h 09m

1 stop

$322Delta

Sun, Sep 20 - Fri, Sep 25

1:31 pm - 11:07 pm

MDW

YYZ

8h 36m

1 stop

12:14 pm - 6:36 pm

YYZ

MDW

7h 22m

1 stop

$350WestJet

Sun, Jun 21 - Tue, Jun 30

9:17 am - 5:24 pm

MDW

YYZ

7h 07m

1 stop

12:09 pm - 6:31 pm

YYZ

MDW

7h 22m

1 stop

$359KLM

Sat, Jun 20 - Fri, Jun 26

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American Airlines flights from Chicago to Region of Ontario

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

American Airlines

Jun 27

ORD8:29 pmChicago O'Hare Intl

1h 54m

YYZ11:23 pmToronto Pearson Intl

Jun 29

YYZ6:02 pmToronto Pearson Intl

7h 32m

1 stop

ORD12:34 amChicago O'Hare Intl

$291

American Airlines

Jun 27

ORD8:29 pmChicago O'Hare Intl

1h 54m

YYZ11:23 pmToronto Pearson Intl

Jun 29

YYZ7:25 amToronto Pearson Intl

2h 10m

ORD8:35 amChicago O'Hare Intl

$298

American Airlines

Jul 21

ORD8:37 pmChicago O'Hare Intl

1h 52m

YYZ11:29 pmToronto Pearson Intl

Jul 25

YYZ3:14 pmToronto Pearson Intl

2h 05m

ORD4:19 pmChicago O'Hare Intl

$323

Delta flights from Chicago to Region of Ontario

Our best Delta deals on Chicago to Region of Ontario flight tickets

Delta

Sep 15

ORD2:00 pmChicago O'Hare Intl

7h 59m

1 stop

YYZ10:59 pmToronto Pearson Intl

Sep 22

YYZ9:45 amToronto Pearson Intl

4h 19m

1 stop

ORD1:04 pmChicago O'Hare Intl

$301

Delta

Sep 21

ORD5:10 pmChicago O'Hare Intl

4h 49m

1 stop

YYZ10:59 pmToronto Pearson Intl

Sep 28

YYZ12:08 pmToronto Pearson Intl

5h 06m

1 stop

ORD4:14 pmChicago O'Hare Intl

$322

Delta

Jun 20

ORD7:01 amChicago O'Hare Intl

7h 18m

1 stop

YYZ3:19 pmToronto Pearson Intl

Jun 24

YYZ12:09 pmToronto Pearson Intl

7h 20m

1 stop

ORD6:29 pmChicago O'Hare Intl

$356

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Wed 9/9

7:00 am-9:40 am

Nonstop1h 40m

Toronto Island

Tue 9/15

10:05 am-11:00 am

Nonstop1h 55m

$216

Quickest round-trip

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Thu 6/25

10:25 am-1:05 pm

Nonstop1h 40m

Toronto Island

Mon 6/29

8:50 am-9:40 am

Nonstop1h 50m

$217

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Wed 9/9

7:00 am-9:40 am

Nonstop1h 40m

Toronto Island

Wed 9/9

8:40 pm-9:35 pm

Nonstop1h 55m

$217

ChicagoToronto

MDW - YTZ

MDWYTZ

Chicago Midway

Fri 6/26

3:20 pm-6:00 pm

Nonstop1h 40m

Toronto Island

Mon 6/29

8:50 am-9:40 am

Nonstop1h 50m

$218

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Sat 6/27

7:25 am-10:06 am

Nonstop1h 41m

Toronto Island

Mon 6/29

12:15 pm-1:10 pm

Nonstop1h 55m

$219

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Wed 9/9

8:45 am-3:50 pm

1 stop6h 05m

Toronto Island

Sat 9/12

7:20 pm-8:16 pm

Nonstop1h 56m

$221

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Sat 9/12

5:59 pm-10:57 pm

1 stop3h 58m

Toronto Pearson Intl

Mon 9/14

2:24 pm-6:33 pm

1 stop5h 09m

$301

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Sun 9/20

9:30 am-1:34 pm

1 stop3h 04m

Toronto Pearson Intl

Fri 9/25

2:24 pm-6:33 pm

1 stop5h 09m

$322

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Sun 6/21

1:31 pm-11:07 pm

1 stop8h 36m

Toronto Pearson Intl

Tue 6/30

12:14 pm-6:36 pm

1 stop7h 22m

$350

ChicagoToronto

MDW - YYZ

MDWYYZ

Chicago Midway

Sat 6/20

9:17 am-5:24 pm

1 stop7h 07m

Toronto Pearson Intl

Fri 6/26

12:09 pm-6:31 pm

1 stop7h 22m

$359

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 November is, on average, the cheapest month to fly to Region of Ontario from Chicago, with most prices found around $58. If you aren’t able to travel during the month of November, then book flights to Region of Ontario from Chicago during March instead. Flights to Region of Ontario in March, while not as cheap as those in November, still average around $58.

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 $430. 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 $699. 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 Chicago to Region of Ontario in the evening for as low as $416. 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 $751.

What is the cheapest Chicago to Ontario flight route?

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

How far in advance should I book a flight from Chicago to 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 $309 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 $203 on momondo.

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

There are 4 cabin classes available to choose from on Chicago 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 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	$112
Fastest flight time	1h 39m
Direct flights	Every day
Airports in Region of Ontario	125 airports

The best one-way flight to Region of Ontario from Chicago in the past 72 hours is $112. The best round-trip flight deal from Chicago to Region of Ontario found on momondo in the last 72 hours is $241.

The fastest flight from Chicago to Region of Ontario takes 1h 39m

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

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

Search flight deals

Frequently asked questions about flying from Chicago to Ontario

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 7 operators available for flights from Chicago to Ontario as of June 2026.
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 18.29% of the total bookings. Other popular models include Embraer 175 (Enhanced Winglets) with 9.41%, Embraer 175 with 9.35%, and Boeing 787-8 Dreamliner with 7.57%.

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
Delta	PriceFrom $88	Free Cancellation	Rating 7.9 8,394 reviews	Search Delta flights
Air Canada	PriceFrom $114	Free Cancellation	Rating 7.1 11,149 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $160	Free Cancellation	Rating 7.5 1,045 reviews	Search Qantas Airways flights
WestJet	PriceFrom $170	Free Cancellation	Rating 7.2 3,356 reviews	Search WestJet flights
Porter Airlines	PriceFrom $174	Free Cancellation	Rating 8.0 438 reviews	Search Porter Airlines flights
United Airlines	PriceFrom $189	Free Cancellation	Rating 7.4 9,794 reviews	Search United Airlines flights
American Airlines	PriceFrom $204	Free Cancellation	Rating 7.1 11,643 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

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Popular cities in Ontario

Flights to Torontofrom $157

Flights to Vancouverfrom $143

Flights to Montrealfrom $221

Flights to Calgaryfrom $227

Flights to Ottawafrom $255

Flights to Halifaxfrom $298

Flights to Winnipegfrom $364

Flights to Québec Cityfrom $332

Flights to Saskatoonfrom $347

Flights to Kelownafrom $265

Flights to St. John'sfrom $471

Flights to Reginafrom $419

Cheap flights from Chicago to Ontario from $96

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 7/2. 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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American Airlines flights from Chicago to Region of Ontario

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

Delta flights from Chicago to Region of Ontario

Our best Delta deals on Chicago to Region of Ontario flight tickets

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How to get the cheapest flight ticket from Chicago 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 Chicago to Ontario flight route?

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

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

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

What is the cheapest airline that flies 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?

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

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

Frequently asked questions about flying from Chicago to 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?

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

Chicago flight routes

According to popular flight searches on momondo this year

Region of Ontario flight routes

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