Find flights
Deals
When to book
Airlines
FAQs
English
Cheap flights from Chicago O'Hare Intl Airport to Ontario from C$ 115
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 18/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
27 Nov — 4 Dec1
Find flight deals from O'Hare Intl to Ontario
Cheapest flights from O'Hare Intl to OntarioExplore 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 28 October 2025.
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 28 October 2025.
Tue 2/125:00 a.m.ORD - YYZ
1 stop5h 14mAmerican Airlines
Fri 5/126:00 a.m.YYZ - ORD
Nonstop2h 15mAmerican Airlines
Deal found 26/10C$ 271
Fri 5/122:55 p.m.ORD - YYZ
Nonstop1h 49mAmerican Airlines
Sun 7/126:00 a.m.YYZ - ORD
1 stop6h 03mAmerican Airlines
Deal found 27/10C$ 280
Fri 5/128:15 p.m.ORD - YYZ
Nonstop1h 39mAir Canada
Sun 7/127:00 a.m.YYZ - ORD
1 stop5h 18mAir Canada
Deal found 27/10C$ 288
Tue 2/125:00 a.m.ORD - YYZ
1 stop5h 14mAmerican Airlines
Wed 10/123:56 p.m.YYZ - ORD
1 stop5h 54mAmerican Airlines
Deal found 26/10C$ 292
Wed 17/129:10 p.m.ORD - YYZ
Nonstop1h 49mMultiple Airlines
Sun 18/16:30 p.m.YYZ - ORD
Nonstop2h 00mMultiple Airlines
Deal found 26/10C$ 294
Sat 6/123:35 p.m.ORD - YYZ
1 stop5h 09mAir Canada
Sun 7/126:20 a.m.YYZ - ORD
1 stop5h 58mAir Canada
Deal found 27/10C$ 297
Sat 15/119:44 a.m.ORD - YYZ
Nonstop1h 47mAmerican Airlines
Tue 18/116:00 a.m.YYZ - ORD
Nonstop2h 15mAmerican Airlines
Deal found 26/10C$ 298
Wed 10/128:29 a.m.ORD - YYZ
1 stop6h 08mAmerican Airlines
Wed 17/126:00 a.m.YYZ - ORD
Nonstop2h 15mAmerican Airlines
Deal found 26/10C$ 304
Tue 2/1212:50 p.m.ORD - YTZ
1 stop6h 05mAir Canada
Wed 10/1210:30 a.m.YTZ - ORD
1 stop5h 25mAir Canada
Deal found 26/10C$ 309
Thu 13/1112:50 p.m.ORD - YTZ
1 stop7h 45mAir Canada
Sat 15/113:30 p.m.YTZ - ORD
1 stop5h 30mAir Canada
Deal found 27/10C$ 322
Sat 15/113:35 p.m.ORD - YTZ
1 stop5h 00mAir Canada
Tue 18/1110:30 a.m.YTZ - ORD
1 stop5h 25mAir Canada
Deal found 26/10C$ 344
Sat 6/1212:50 p.m.ORD - YTZ
1 stop6h 05mAir Canada
Sun 7/128:50 a.m.YTZ - ORD
1 stop5h 01mAir Canada
Deal found 27/10C$ 358
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 28 October 2025.
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 629,999 searches. Data last updated 28 October 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 17/12
1:06 p.m.-4:02 p.m.
Nonstop1h 56m
Toronto Pearson Intl
Wed 7/1
9:00 p.m.-10:05 p.m.
Nonstop2h 05m
C$ 294
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Fri 27/2
12:45 p.m.-7:17 p.m.
1 stop5h 32m
Toronto Pearson Intl
Sun 1/3
8:55 a.m.-10:02 a.m.
Nonstop2h 07m
C$ 308
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Wed 17/12
2:24 p.m.-11:20 p.m.
1 stop7h 56m
Toronto Pearson Intl
Thu 8/1
9:00 p.m.-10:05 p.m.
Nonstop2h 05m
C$ 308
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Wed 17/12
4:25 p.m.-11:20 p.m.
1 stop5h 55m
Toronto Pearson Intl
Fri 9/1
8:55 a.m.-10:01 a.m.
Nonstop2h 06m
C$ 308
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Sat 13/12
6:45 a.m.-11:25 a.m.
1 stop3h 40m
Toronto Pearson Intl
Sun 14/12
3:38 p.m.-6:27 p.m.
1 stop3h 49m
C$ 326
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Tue 18/11
12:29 p.m.-8:29 p.m.
1 stop7h 00m
Toronto Pearson Intl
Sun 23/11
6:05 p.m.-8:29 p.m.
1 stop3h 24m
C$ 326
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Fri 5/12
5:42 p.m.-11:27 p.m.
1 stop4h 45m
Toronto Pearson Intl
Sun 7/12
12:13 p.m.-6:27 p.m.
1 stop7h 14m
C$ 326
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Sat 22/11
6:45 a.m.-11:24 a.m.
1 stop3h 39m
Toronto Pearson Intl
Sun 23/11
12:08 p.m.-4:24 p.m.
1 stop5h 16m
C$ 326
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Fri 5/12
8:50 a.m.-4:15 p.m.
1 stop6h 25m
Toronto Pearson Intl
Mon 8/12
12:15 p.m.-5:46 p.m.
1 stop6h 31m
C$ 326
ChicagoToronto
ORD - YYZ
ORDYYZ
Chicago O'Hare Intl
Tue 18/11
6:45 a.m.-11:24 a.m.
1 stop3h 39m
Toronto Pearson Intl
Thu 20/11
7:50 a.m.-1:17 p.m.
1 stop6h 27m
C$ 326
Showing 1-10 of 60 results
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 C$ 148). Flying from Chicago O'Hare Intl Airport to Region of Ontario in July is currently the most expensive (average of C$ 262). 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 28 October 2025.
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 48% on the flight price compared to flying in the morning, which is usually more expensive.
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 16 December 2024.
Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Region of Ontario flight should consider departing on Thursday at noon when fares are most often at their lowest. Wednesday evenings 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 28 October 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 28 October 2025.
See what other customers who have flown with United Airlines and Air 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.
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Overall
7.4
Food
6.6
Reviews
1 / 20
2.0
MediocreSebrena,Oct 2025
IAH - RSW
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Overall
7.4
Food
6.6
Reviews
1 / 20
2.0
MediocreSebrena,Oct 2025
IAH - RSW
Boarding
7.7
Comfort
7.3
Crew
8.1
Entertainment
7.1
Overall
7.4
Food
6.6
Reviews
1 / 20
2.0
MediocreSebrena,Oct 2025
IAH - RSW
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.
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.
Top 2 airlines flying from O'Hare Intl to Ontario
Discover the top 2 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 629,999 searches. Data last updated 28 October 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
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.