HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$86+ Cheap flights from O'Hare Intl (ORD) to Ontario

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from O'Hare Intl to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from O'Hare Intl to Ontario

Cheapest flights from O'Hare Intl to Ontario
Explore the most affordable flight options available from O'Hare Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This American Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/207:35 amORD - YYZ
1 stop6h 34mAmerican Airlines
Sun 11/236:00 amYYZ - ORD
Nonstop2h 15mAmerican Airlines
Deal found 10/27$194
This American Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/52:55 pmORD - YYZ
Nonstop1h 49mAmerican Airlines
Sun 12/76:00 amYYZ - ORD
1 stop6h 03mAmerican Airlines
Deal found 10/27$200
This Flybillet deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flybillet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/58:15 pmORD - YYZ
Nonstop1h 39mAir Canada
Sun 12/77:00 amYYZ - ORD
1 stop5h 18mAir Canada
Deal found 10/27$206
This American Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:00 amORD - YYZ
1 stop5h 14mAmerican Airlines
Fri 12/127:09 pmYYZ - ORD
1 stop5h 30mAmerican Airlines
Deal found 10/27$209
This United deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/179:10 pmORD - YYZ
Nonstop1h 49mMultiple Airlines
Sun 1/186:30 pmYYZ - ORD
Nonstop2h 00mMultiple Airlines
Deal found 10/26$210
This Flightnetwork deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/610:00 amORD - YYZ
Nonstop1h 40mAir Canada
Sun 12/76:20 amYYZ - ORD
1 stop5h 58mAir Canada
Deal found 10/27$212
This American Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/159:44 amORD - YYZ
Nonstop1h 47mAmerican Airlines
Tue 11/186:00 amYYZ - ORD
Nonstop2h 15mAmerican Airlines
Deal found 10/26$213
This American Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/108:29 amORD - YYZ
1 stop6h 08mAmerican Airlines
Wed 12/176:00 amYYZ - ORD
Nonstop2h 15mAmerican Airlines
Deal found 10/26$217
This Booking.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/38:00 amORD - YYZ
Nonstop1h 40mAir Canada
Tue 12/912:10 pmYYZ - ORD
2 stops9h 00mAir Canada
Deal found 10/26$218
This Booking.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/212:50 pmORD - YTZ
1 stop6h 05mAir Canada
Wed 12/1010:30 amYTZ - ORD
1 stop5h 25mAir Canada
Deal found 10/26$221
This Flybillet deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flybillet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1312:50 pmORD - YTZ
1 stop7h 45mAir Canada
Sat 11/153:30 pmYTZ - ORD
1 stop5h 30mAir Canada
Deal found 10/27$230
This Air Canada deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/153:35 pmORD - YTZ
1 stop5h 00mAir Canada
Tue 11/1810:30 amYTZ - ORD
1 stop5h 25mAir Canada
Deal found 10/26$246

Cheap flight deals from O'Hare Intl to Ontario

Keep the following information in mind while searching for O'Hare Intl to Ontario flight deals. Data was last updated October 28, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$194
(American Airlines)

One-way from

$86
(American Airlines)

Popular in

January

Cheapest in

September

Average price

$299

Good round-trip deal

$349 or less

Good one-way deal

$191 or less
Provider with most accurate pricing for Chicago (CHI)-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Toronto (YTO) flights.
Search Deals
From Chicago O'Hare Intl to Ontario
Search Deals
One-way flight from Chicago O'Hare Intl to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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

 
Customize your flight search to find flights from O'Hare Intl to 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, Cheapflights users made 2,558,603 searches. Data last updated October 28, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Ontario that are best for you.

Fly from

O'Hare Intl

Fly to

Ontario

Route

Depart

Return

Price

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 12/17

1:06 pm-4:02 pm

Nonstop1h 56m

Toronto Pearson Intl

Wed 1/7

9:00 pm-10:05 pm

Nonstop2h 05m

$210

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 12/17

2:24 pm-11:20 pm

1 stop7h 56m

Toronto Pearson Intl

Thu 1/8

9:00 pm-10:05 pm

Nonstop2h 05m

$220

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Thu 11/13

12:50 pm-9:35 pm

1 stop7h 45m

Toronto Island

Sat 11/15

3:30 pm-8:00 pm

1 stop5h 30m

$230

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Wed 12/10

9:40 am-4:24 pm

1 stop5h 44m

Toronto Pearson Intl

Fri 12/12

6:05 am-10:00 am

1 stop4h 55m

$233

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 1/6

6:00 am-4:12 pm

1 stop9h 12m

Toronto Pearson Intl

Fri 1/9

7:45 am-1:07 pm

1 stop6h 22m

$233

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 12/11

6:45 am-11:25 am

1 stop3h 40m

Toronto Pearson Intl

Sun 12/14

3:38 pm-6:27 pm

1 stop3h 49m

$233

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Sat 12/13

6:45 am-11:25 am

1 stop3h 40m

Toronto Pearson Intl

Sun 12/14

3:38 pm-6:27 pm

1 stop3h 49m

$233

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 12/5

5:42 pm-11:27 pm

1 stop4h 45m

Toronto Pearson Intl

Sun 12/7

12:13 pm-6:27 pm

1 stop7h 14m

$233

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Tue 12/9

10:36 am-5:08 pm

1 stop5h 32m

Toronto Pearson Intl

Fri 12/12

3:38 pm-6:27 pm

1 stop3h 49m

$233

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Fri 12/5

8:50 am-4:15 pm

1 stop6h 25m

Toronto Pearson Intl

Mon 12/8

12:15 pm-5:46 pm

1 stop6h 31m

$233

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 60 results
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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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, March is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Region of Ontario (average of $106). Flying from Chicago O'Hare Intl Airport to Region of Ontario in July is currently the most expensive (average of $187). 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?

Find hourly flight availability from O'Hare Intl to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 28, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 17% on flights from Chicago O'Hare Intl Airport to Region of Ontario by exploring options for tickets in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Ontario. Price data was last updated on December 16, 2024.

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

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

Explore weekly flight availability from O'Hare Intl to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated October 28, 2025.

The most flights from ORD to CAON are scheduled on a Monday (64 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (45 on average).

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

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated October 28, 2025.
Get a feel of what it's like to fly with Porter Airlines, United Airlines, and American Airlines from Chicago O'Hare Intl Airport to Ontario by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
384 reviews

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
8.0
Very good
384 reviews
Porter Airlines
8.0
Very good
384 reviews

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
9,000 reviews
Porter Airlines
8.0
Very good
384 reviews

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
American Airlines
7.2
Good
11,034 reviews
Porter Airlines
8.0
Very good
384 reviews

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,371 reviews
Porter Airlines
8.0
Very good
384 reviews

Boarding

8.2

Entertainment

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    For as low as $210, United Airlines can have you in Region of Ontario from Chicago O'Hare Intl Airport in 1h 56m. Chicago O'Hare Intl Airport and Region of Ontario are separated by a distance of 436 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    While some choose either Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl or Chicago O'Hare Intl - Toronto Island, Chicago O'Hare Intl - Toronto Pearson Intl is the most popular route from Chicago O'Hare Intl Airport to Region of Ontario.

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

    Consider Finnair (92%), Qatar Airways (91%) or British Airways (89%) when booking your flight. These represent the most reliable airlines when flying from Chicago O'Hare Intl Airport to Region of Ontario.

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

    The cheapest flight price from Chicago O'Hare Intl Airport to Region of Ontario is $122. On average you can expect to pay $826. The most popular route, (Chicago O'Hare Intl - Toronto Pearson Intl), can usually be booked for $166.

  • 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, March is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Region of Ontario (average of $106). Flying from Chicago O'Hare Intl Airport to Region of Ontario in July is currently the most expensive (average of $187). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for O'Hare Intl to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Pearson Intl flights
O'Hare Intl to Vancouver Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Calgary flights
Midway to Toronto Island flights
O'Hare Intl to Toronto Island flights
Midway to Pearson Intl flights
Midway to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Québec City flights
Midway to Vancouver Intl flights
O'Hare Intl to Abbotsford flights
Midway to Calgary flights
O'Hare Intl to Ottawa flights
O'Hare Intl to Winnipeg flights
Midway to Québec City flights
O'Hare Intl to Halifax flights
Midway to Ottawa flights
O'Hare Intl to Edmonton flights
Midway to Winnipeg flights
Midway to Halifax flights
O'Hare Intl to Regina flights
O'Hare Intl to Kelowna flights
O'Hare Intl to St. John's flights
O'Hare Intl to London flights
O'Hare Intl to Saskatoon flights
O'Hare Intl to Fredericton flights
O'Hare Intl to Hamilton flights
O'Hare Intl to Victoria flights
Midway to St. John's flights
Midway to Edmonton flights
Midway to Kelowna flights
Midway to Saskatoon flights
O'Hare Intl to Thunder Bay flights
O'Hare Intl to Deer Lake flights
O'Hare Intl to Whitehorse flights
Midway to Thunder Bay flights
O'Hare Intl to Charlottetown flights
Midway to Victoria flights
O'Hare Intl to Sydney flights
O'Hare Intl to Penticton flights
O'Hare Intl to Campbell River flights
O'Hare Intl to Kingston flights
O'Hare Intl to Lethbridge flights
O'Hare Intl to Grande Prairie flights

Top 4 airlines flying from O'Hare Intl to Ontario

Discover the top 4 airlines that operate flights from O'Hare Intl to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$109Average$307FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$118Average$310FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$146Average$428FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$223Average$388FlexibilityNo cancel feeOn-time71%

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.