What is the cheapest airline that flies from Ontario to Chicago O'Hare Intl?

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

Which airlines fly to Chicago O'Hare Intl Airport?

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from Region of Ontario according to our data. Air Canada is the first choice among our users, with 56% of people opting to fly with this airline when travelling to Chicago O'Hare Intl Airport. Keep in mind that there are 5 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Chicago O'Hare Intl Airport?

Flight times vary depending on what airport in Region of Ontario you fly out of and what airport in Chicago O'Hare Intl Airport you fly into. For example, flying from Ottawa to Chicago O'Hare Intl Airport takes 2h 19m on average. On the other hand, flying from Toronto to Chicago O'Hare Intl Airport takes 5h 07m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo to see if there are any available for your route.

When did momondo last update prices for flights from Ontario to Chicago O'Hare Intl Airport?

Prices for flights from Ontario to Chicago O'Hare Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Ontario to Chicago O'Hare Intl Airport?

There are 5 operators available for flights from Ontario to Chicago O'Hare Intl Airport as of May 2026.

How old do you have to be to fly from Ontario to Chicago O'Hare Intl Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Chicago O'Hare Intl Airport.

What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

C$ 170 Cheap Flights from Region of Ontario to Chicago O'Hare Intl Airport in 2026

Q: How many flights depart from Region of Ontario to Chicago O'Hare Intl Airport on average per day?

As of May 2026, there are 98 flights per day flying from Region of Ontario to Chicago O'Hare Intl Airport. The most common time of day flights depart is 1:00p.m., with 43% of flights taking off at noon.

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Find the cheapest flights from Ontario to Chicago

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:40 p.m. - 9:35 p.m.

YTZ

ORD

1h 55mdirect

11:45 a.m. - 2:25 p.m.

ORD

YTZ

1h 40mdirect

C$ 276Porter Airlines

Sun, 6 Sep - Sun, 13 Sep

8:40 p.m. - 9:35 p.m.

YTZ

ORD

1h 55mdirect

7:00 a.m. - 9:40 a.m.

ORD

YTZ

1h 40mdirect

C$ 277Porter Airlines

Sun, 13 Sep - Sat, 19 Sep

4:00 p.m. - 4:59 p.m.

YYZ

ORD

1h 59mdirect

9:55 a.m. - 12:35 p.m.

ORD

YYZ

1h 40mdirect

C$ 280Air Canada

Fri, 22 May - Tue, 26 May

7:20 p.m. - 8:16 p.m.

YTZ

ORD

1h 56mdirect

7:25 a.m. - 10:06 a.m.

ORD

YTZ

1h 41mdirect

C$ 280Air Canada

Thu, 25 Jun - Mon, 29 Jun

6:40 p.m. - 7:40 p.m.

YYZ

ORD

2h 00mdirect

9:55 a.m. - 12:35 p.m.

ORD

YYZ

1h 40mdirect

C$ 281Air Canada

Fri, 22 May - Thu, 28 May

10:45 a.m. - 2:53 p.m.

YTZ

ORD

5h 08m

1 stop

7:25 a.m. - 10:06 a.m.

ORD

YTZ

1h 41mdirect

C$ 281Air Canada

Sat, 23 May - Sat, 6 Jun

10:15 a.m. - 11:21 a.m.

YYZ

ORD

2h 06mdirect

9:20 p.m. - 11:59 p.m.

ORD

YYZ

1h 39mdirect

C$ 282United Airlines

Fri, 22 May - Mon, 25 May

8:50 a.m. - 9:50 a.m.

YYZ

ORD

2h 00mdirect

7:09 a.m. - 9:54 a.m.

ORD

YYZ

1h 45mdirect

C$ 284United Airlines

Thu, 28 May - Thu, 4 Jun

9:00 p.m. - 10:05 p.m.

YYZ

ORD

2h 05mdirect

9:15 p.m. - 11:59 p.m.

ORD

YYZ

1h 44mdirect

C$ 288Lufthansa

Thu, 28 May - Mon, 1 Jun

12:25 p.m. - 1:22 p.m.

YYZ

ORD

1h 57mdirect

9:50 a.m. - 12:35 p.m.

ORD

YYZ

1h 45mdirect

C$ 295GOL

Sat, 22 Aug - Sun, 23 Aug

Porter Airlines flights from Region of Ontario to Chicago O'Hare Intl Airport

Our best Porter Airlines deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets

Porter Airlines

6 Sep

YTZ8:40 p.m.Toronto Island

1h 55m

ORD9:35 p.m.Chicago O'Hare Intl

13 Sep

ORD11:45 a.m.Chicago O'Hare Intl

1h 40m

YTZ2:25 p.m.Toronto Island

C$ 276

Porter Airlines

13 Sep

YTZ8:40 p.m.Toronto Island

1h 55m

ORD9:35 p.m.Chicago O'Hare Intl

19 Sep

ORD7:00 a.m.Chicago O'Hare Intl

1h 40m

YTZ9:40 a.m.Toronto Island

C$ 277

Porter Airlines

8 Sep

YTZ10:05 a.m.Toronto Island

1h 55m

ORD11:00 a.m.Chicago O'Hare Intl

11 Sep

ORD7:00 a.m.Chicago O'Hare Intl

1h 40m

YTZ9:40 a.m.Toronto Island

C$ 284

Air Canada flights from Region of Ontario to Chicago O'Hare Intl Airport

Our best Air Canada deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets

Air Canada

22 May

YYZ4:00 p.m.Toronto Pearson Intl

1h 59m

ORD4:59 p.m.Chicago O'Hare Intl

26 May

ORD9:55 a.m.Chicago O'Hare Intl

1h 40m

YYZ12:35 p.m.Toronto Pearson Intl

C$ 280

Air Canada

22 May

YYZ6:40 p.m.Toronto Pearson Intl

2h 00m

ORD7:40 p.m.Chicago O'Hare Intl

28 May

ORD9:55 a.m.Chicago O'Hare Intl

1h 40m

YYZ12:35 p.m.Toronto Pearson Intl

C$ 281

Air Canada

11 Jun

YTZ12:15 p.m.Toronto Island

1h 55m

ORD1:10 p.m.Chicago O'Hare Intl

18 Jun

ORD7:25 a.m.Chicago O'Hare Intl

1h 41m

YTZ10:06 a.m.Toronto Island

C$ 282

momondo Fare Finder

Use the filters below to find and compare flights from Ontario to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

TorontoChicago

YTZ - ORD

YTZORD

Toronto Island

Sun 6/9

8:40 p.m.-9:35 p.m.

Nonstop1h 55m

Chicago O'Hare Intl

Sun 13/9

11:45 a.m.-2:25 p.m.

Nonstop1h 40m

C$ 276

TorontoChicago

YTZ - ORD

YTZORD

Toronto Island

Sun 13/9

8:40 p.m.-9:35 p.m.

Nonstop1h 55m

Chicago O'Hare Intl

Sat 19/9

7:00 a.m.-9:40 a.m.

Nonstop1h 40m

C$ 277

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Fri 22/5

4:00 p.m.-4:59 p.m.

Nonstop1h 59m

Chicago O'Hare Intl

Tue 26/5

9:55 a.m.-12:35 p.m.

Nonstop1h 40m

C$ 280

TorontoChicago

YTZ - ORD

YTZORD

Toronto Island

Thu 25/6

7:20 p.m.-8:16 p.m.

Nonstop1h 56m

Chicago O'Hare Intl

Mon 29/6

7:25 a.m.-10:06 a.m.

Nonstop1h 41m

C$ 280

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Fri 22/5

6:40 p.m.-7:40 p.m.

Nonstop2h 00m

Chicago O'Hare Intl

Thu 28/5

9:55 a.m.-12:35 p.m.

Nonstop1h 40m

C$ 281

TorontoChicago

YTZ - ORD

YTZORD

Toronto Island

Sat 23/5

10:45 a.m.-2:53 p.m.

1 stop5h 08m

Chicago O'Hare Intl

Sat 6/6

7:25 a.m.-10:06 a.m.

Nonstop1h 41m

C$ 281

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Fri 22/5

10:15 a.m.-11:21 a.m.

Nonstop2h 06m

Chicago O'Hare Intl

Mon 25/5

9:20 p.m.-11:59 p.m.

Nonstop1h 39m

C$ 282

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 28/5

8:50 a.m.-9:50 a.m.

Nonstop2h 00m

Chicago O'Hare Intl

Thu 4/6

7:09 a.m.-9:54 a.m.

Nonstop1h 45m

C$ 284

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Thu 28/5

9:00 p.m.-10:05 p.m.

Nonstop2h 05m

Chicago O'Hare Intl

Mon 1/6

9:15 p.m.-11:59 p.m.

Nonstop1h 44m

C$ 288

TorontoChicago

YYZ - ORD

YYZORD

Toronto Pearson Intl

Sat 22/8

12:25 p.m.-1:22 p.m.

Nonstop1h 57m

Chicago O'Hare Intl

Sun 23/8

9:50 a.m.-12:35 p.m.

Nonstop1h 45m

C$ 295

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 Region of Ontario to Chicago O'Hare Intl Airport

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 Chicago O'Hare Intl Airport?

In general, January is the cheapest month to fly from Region of Ontario to Chicago O'Hare Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 69. The month of September is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Region of Ontario averaging around C$ 81.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Friday when prices can be found for as low as C$ 695. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Region of Ontario to Chicago O'Hare Intl Airport for around C$ 1,072.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

In the morning is the cheapest time of day to fly from Region of Ontario to Chicago O'Hare Intl Airport when you can find flight prices for as low as C$ 738. Flying to Chicago O'Hare Intl Airport in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are C$ 1,144 on average. Flights to Chicago O'Hare Intl Airport from Region of Ontario at noon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Ontario to Chicago O'Hare Intl flight route?

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

How far in advance should I book a flight from Ontario to Chicago O'Hare Intl Airport?

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around C$ 399 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Region of Ontario for as low as C$ 265 on momondo.

Can stopping save me money on Region of Ontario to Chicago O'Hare Intl Airport flights?

You could potentially save up to 10% on your flight if you consider stops on a Region of Ontario to Chicago O'Hare Intl Airport flight.

Cheap Region of Ontario to Chicago O'Hare Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Chicago O'Hare Intl Airport

Best price found	C$ 180
Fastest flight time	1h 50m
Direct flights	Every day

The best one-way flight to Chicago O'Hare Intl Airport from Region of Ontario in the past 72 hours is C$ 180. The best round-trip flight deal from Region of Ontario to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is C$ 307.

The fastest flight from Region of Ontario to Chicago O'Hare Intl Airport takes 1h 50m

Direct flights go from Region of Ontario to Chicago O'Hare Intl Airport every day.

Search flight deals

Frequently asked questions about flying from Ontario to Chicago O'Hare Intl Airport

When did momondo last update prices for flights from Ontario to Chicago O'Hare Intl Airport?
Prices for flights from Ontario to Chicago O'Hare Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario to Chicago O'Hare Intl Airport?
There are 5 operators available for flights from Ontario to Chicago O'Hare Intl Airport as of May 2026.
How old do you have to be to fly from Ontario to Chicago O'Hare Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to Chicago O'Hare Intl Airport.
What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?
The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Region of Ontario to Chicago O'Hare Intl Airport?
Based on momondo bookings for flights between Region of Ontario and Chicago O'Hare Intl Airport, the leading plane model is Boeing 737 MAX 8, making up 11.39% of the total bookings. Other popular models include Embraer 175 (Enhanced Winglets) with 11.39%, De Havilland (Bombardier) DHC-8-400 Dash 8Q with 11.25%, and Embraer 195 E2 with 8.87%.

Best airlines flying from Region of Ontario to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Region of Ontario to Chicago O'Hare Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom C$ 200	Free Cancellation	Rating 7.1 11,671 reviews	Search American Airlines flights
Porter Airlines	PriceFrom C$ 219	Free Cancellation	Rating 8.0 435 reviews	Search Porter Airlines flights
Air Canada	PriceFrom C$ 239	Free Cancellation	Rating 7.1 10,990 reviews	Search Air Canada flights
United Airlines	PriceFrom C$ 261	Free Cancellation	Rating 7.4 9,681 reviews	Search United Airlines flights
WestJet	PriceFrom C$ 362	Free Cancellation	Rating 7.2 3,331 reviews	Search WestJet flights

Schaumburg

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Merrillville

Rosemont

Northbrook

Tinley Park

Downers Grove

Skokie

Great Lakes

Wheeling

Hammond

Glenview

Harvey

Naperville

Munster

Hoffman Estates

Elmhurst

Harvard

DeKalb

Kankakee

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Chicago for you.

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

Flights from Ontario to Chicago with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Chicago from Ontario.

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

If you are not ready to book a flight from Ontario to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.

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Cheap flights from Ontario to Chicago from C$ 170

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Chicago departing on 6/6. 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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Porter Airlines flights from Region of Ontario to Chicago O'Hare Intl Airport

Our best Porter Airlines deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets

Air Canada flights from Region of Ontario to Chicago O'Hare Intl Airport

Our best Air Canada deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets

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Use the filters below to find and compare flights from Ontario to Chicago O'Hare Intl Airport that are best for you.

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How to get the cheapest flight ticket from Region of Ontario to Chicago O'Hare Intl Airport

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

What is the cheapest Ontario to Chicago O'Hare Intl flight route?

How far in advance should I book a flight from Ontario to Chicago O'Hare Intl Airport?

Can stopping save me money on Region of Ontario to Chicago O'Hare Intl Airport flights?

What is the cheapest airline that flies from Ontario to Chicago O'Hare Intl?

Which airlines fly to Chicago O'Hare Intl Airport?

How many flights depart from Region of Ontario to Chicago O'Hare Intl Airport on average per day?

How many flights depart from Region of Ontario to Chicago O'Hare Intl Airport on average per week?

How long does it take to fly to Chicago O'Hare Intl Airport?

Cheap Region of Ontario to Chicago O'Hare Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Chicago O'Hare Intl Airport

Best price found

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to Chicago O'Hare Intl Airport

Best airlines flying from Region of Ontario to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Region of Ontario to Chicago O'Hare Intl Airport with momondo

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