Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Chicago O'Hare Intl Airport to Ontario from C$ 139

ORD — YYZ
10 Oct — 17 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from O'Hare Intl to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from O'Hare Intl to Ontario

Tue 3/111:55 p.m. -
Nonstop1h 47m
Sat 7/1110:45 a.m. -
1 stop5h 07m
Deal found 10/9C$ 296
Tue 3/1112:20 p.m. -
Nonstop1h 46m
Sat 7/1110:35 a.m. -
Nonstop2h 05m
Deal found 10/9C$ 298
Wed 4/1112:20 p.m. -
Nonstop1h 46m
Wed 11/114:35 p.m. -
Nonstop2h 05m
Deal found 10/9C$ 299
Fri 23/102:00 p.m. -
Nonstop1h 48m
Mon 26/1010:35 a.m. -
Nonstop2h 05m
Deal found 10/9C$ 303
Wed 23/97:25 a.m. -
Nonstop1h 42m
Sat 26/97:35 p.m. -
Nonstop2h 06m
Deal found 10/9C$ 305
Wed 14/108:45 a.m. -
1 stop6h 05m
Wed 21/1012:15 p.m. -
Nonstop2h 10m
Deal found 10/9C$ 307
Sun 25/107:05 a.m. -
1 stop6h 16m
Sun 1/114:35 p.m. -
Nonstop2h 05m
Deal found 10/9C$ 309
Sat 24/102:00 p.m. -
Nonstop1h 48m
Sat 31/104:35 p.m. -
Nonstop2h 05m
Deal found 9/9C$ 310
Fri 25/98:40 p.m. -
Nonstop1h 46m
Sun 27/97:00 a.m. -
Nonstop2h 00m
Deal found 8/9C$ 310
Sun 25/101:55 p.m. -
Nonstop1h 47m
Thu 29/1010:45 a.m. -
1 stop5h 07m
Deal found 8/9C$ 314
Sat 10/103:40 p.m. -
1 stop5h 13m
Tue 13/104:00 p.m. -
1 stop5h 12m
Deal found 9/9C$ 314
Wed 30/95:00 a.m. -
1 stop5h 43m
Wed 30/92:00 p.m. -
Nonstop1h 55m
Deal found 8/9C$ 316

Find flight deals from O'Hare Intl to Ontario

Round-trip from

C$ 305

One-way from

C$ 139

Popular in

December

Cheapest in

March

Average price

C$ 379

Good round-trip deal

C$ 337 or less

Good one-way deal

C$ 139 or less
Air Canada
  • Air Canada
  • 23/9-30/9
  • Nonstop
  • 3h 48m total
  • Chicago to Ontario
Search Deals
Air Canada
  • Air Canada
  • 29/11-31/12
  • Nonstop
  • 1h 47m total
  • Chicago to Ontario
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
Search Deals
Price to beat on a round-trip flight from Chicago O'Hare Intl to Ontario.
Search Deals
Price to beat on a one-way flight from Chicago O'Hare Intl to Ontario.
Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoToronto

ORD Chicago O'Hare Intl - YTZ Toronto Island

ORDYTZ

Chicago O'Hare Intl

Sun 11/10

2:00 p.m.-4:48 p.m.

Nonstop1h 48m

Toronto Island

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 141

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Sun 27/9

8:40 p.m.-11:26 p.m.

Nonstop1h 46m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 141

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Fri 4/12

8:55 a.m.-11:28 p.m.

1 stop13h 33m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 143

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Sun 6/12

9:34 p.m.-11:48 a.m.

1 stop13h 14m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 143

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Wed 21/10

12:55 p.m.-7:02 p.m.

1 stop5h 07m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 143

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Sun 4/10

9:45 p.m.-10:04 a.m.

1 stop11h 19m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 143

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Thu 1/10

4:00 p.m.-11:54 p.m.

1 stop6h 54m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 143

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Mon 7/12

6:00 a.m.-5:59 p.m.

1 stop10h 59m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 145

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Tue 8/12

7:00 a.m.-9:29 p.m.

1 stop13h 29m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 145

ChicagoToronto

ORD Chicago O'Hare Intl - YYZ Toronto Pearson Intl

ORDYYZ

Chicago O'Hare Intl

Wed 23/9

12:16 p.m.-7:00 p.m.

1 stop5h 44m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 145

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from O'Hare Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from O'Hare Intl with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to Ontario

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Region of Ontario?

Currently, February is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Region of Ontario (average of C$ 383). Flying from Chicago O'Hare Intl Airport to Region of Ontario in March is currently the most expensive (average of C$ 556). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ORD to ON?

It’s typically best to fly out from Chicago O'Hare Intl Airport to Region of Ontario in the evening. Doing so could potentially save you 44% on the flight price compared to flying in the morning, which is usually more expensive.

Weekly flight availability from Chicago O'Hare Intl Airport to Region of Ontario

The most flights from ORD to CAON are scheduled on a Wednesday (67 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (33 on average).

How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to Region of Ontario?

Airfare is below average for this route at the moment.
Chicago O'Hare Intl Airport to Region of Ontario flights typically cost between C$ 364 and C$ 582 in September.
The cheapest round-trip price found within the last 5 days was C$ 310 on Air Canada (25 Sep-27 Sep).

How far ahead should I book a flight from Chicago O'Hare Intl Airport to Region of Ontario?

To ensure you get the cheapest price possible for a flight from Chicago O'Hare Intl Airport to Region of Ontario, you should look to book at least 84 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to Region of Ontario?

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Region of Ontario flight should consider departing on Thursday mornings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Ontario

See what other customers who have flown with United Airlines,American Airlines, andAir Canada from Chicago O'Hare Intl Airport to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,194 reviews
Check prices

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
United Airlines
7.4
Good
10,194 reviews
United Airlines
7.4
Good
10,194 reviews
Check prices

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
American Airlines
7.1
Good
12,045 reviews
United Airlines
7.4
Good
10,194 reviews
Check prices

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
Air Canada
7.1
Good
11,608 reviews
United Airlines
7.4
Good
10,194 reviews
Check prices

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible

Related info for your journey

  • How long is the flight from Chicago O'Hare Intl Airport to Region of Ontario?

    Departing from Chicago O'Hare Intl Airport to Region of Ontario will take you 1h 44m. Airlines will cover a distance of 702 km. Most flights are nonstop.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to Region of Ontario one-way?

    C$ 88 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Air Canada, with prices starting from C$ 111 and C$ 133, respectively.

  • What are the most popular routes from Chicago O'Hare Intl Airport to Region of Ontario?

    When deciding which route to take from Chicago O'Hare Intl Airport to Region of Ontario consider Chicago O'Hare Intl - Toronto Pearson Intl, Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl or Chicago O'Hare Intl - Toronto Island as they are the most popular.

  • What are the most reliable airlines from Chicago O'Hare Intl Airport to Region of Ontario?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago O'Hare Intl Airport to Region of Ontario on time: Korean Air (86%), Royal Jordanian (82%), Republic Airways (75%).

  • What are the cheapest flights from Chicago O'Hare Intl Airport to Region of Ontario?

    While on average a flight from Chicago O'Hare Intl Airport to Region of Ontario is generally C$ 410, our data shows the cheapest flight currently is C$ 133. When looking at the most popular route, (Chicago O'Hare Intl - Toronto Pearson Intl), you can expect to pay C$ 309 for that flight.

  • Can I find deals for flights from O'Hare Intl to Ontario that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to Ontario.

  • Can I find deals for business class flights from O'Hare Intl to Ontario?

    Yes. Cheapflights offers flight deals from O'Hare Intl to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Region of Ontario?

    Currently, February is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Region of Ontario (average of C$ 383). Flying from Chicago O'Hare Intl Airport to Region of Ontario in March is currently the most expensive (average of C$ 556). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from O'Hare Intl to Ontario

AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 134AverageC$ 655FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 284AverageC$ 466FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 340AverageC$ 441FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from O'Hare Intl to Ontario?

Deals for O'Hare Intl to Ontario flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl to Ontario?

Millions of users choose and trust Cheapflights to book the best flight deals from O'Hare Intl to Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from O'Hare Intl to Ontario with no change fees?

Yes! Cheapflights helps users easily find flights from O'Hare Intl to Ontario with no change fees.

Can Cheapflights notify me if prices for flights from O'Hare Intl to Ontario become cheaper?

Yes! Start tracking prices for O'Hare Intl to Ontario flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.