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Cheap flights from Ontario to Chicago O'Hare Intl Airport from C$ 142
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 18/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — ORD
5 Aug — 12 Aug1
Round-trip
1 adult
Economy
Cheap flight deals from Ontario to O'Hare Intl
Keep the following information in mind while searching for Ontario to O'Hare Intl flight deals. Data was last updated 31 July 2025.
Find flight deals from Ontario to O'Hare Intl
Cheapest flights from Ontario to O'Hare IntlExplore the most affordable flight options available from Ontario to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 July 2025.
Explore the most affordable flight options available from Ontario to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 July 2025.
Fri 7/1112:05 p.m.YYZ - ORD
Nonstop1h 56mAir Canada
Sun 9/113:55 p.m.ORD - YYZ
Nonstop1h 39mAir Canada
Deal found 30/7C$ 203
Sat 13/93:25 p.m.YTZ - ORD
1 stop5h 46mAir Canada
Sat 20/93:35 p.m.ORD - YTZ
1 stop4h 59mAir Canada
Deal found 29/7C$ 214
Thu 18/96:40 p.m.YUL - ORD
Nonstop2h 31mAir Canada
Mon 22/98:40 a.m.ORD - YUL
Nonstop2h 17mAir Canada
Deal found 30/7C$ 241
Thu 4/95:15 p.m.YYZ - ORD
Nonstop1h 57mLufthansa
Sun 7/99:12 p.m.ORD - YYZ
Nonstop1h 46mLufthansa
Deal found 30/7C$ 251
Wed 20/89:00 p.m.YYZ - ORD
Nonstop2h 07mUnited Airlines
Tue 2/99:12 p.m.ORD - YYZ
Nonstop1h 46mUnited Airlines
Deal found 30/7C$ 261
Tue 7/103:49 p.m.YYZ - ORD
1 stop6h 21mAmerican Airlines
Sun 12/105:22 a.m.ORD - YYZ
1 stop4h 48mAmerican Airlines
Deal found 29/7C$ 270
Thu 4/97:50 a.m.YUL - ORD
1 stop5h 30mAmerican Airlines
Sun 7/97:00 a.m.ORD - YUL
1 stop14h 57mAmerican Airlines
Deal found 30/7C$ 276
Fri 12/912:14 p.m.YYZ - ORD
1 stop6h 50mDelta
Sun 14/99:10 a.m.ORD - YYZ
1 stop7h 13mDelta
Deal found 30/7C$ 292
Thu 4/96:00 a.m.YUL - ORD
1 stop8h 09mDelta
Sat 13/910:30 a.m.ORD - YUL
1 stop7h 55mDelta
Deal found 30/7C$ 297
Thu 4/94:55 p.m.YUL - ORD
Nonstop2h 46mMultiple Airlines
Sun 7/98:40 a.m.ORD - YUL
Nonstop2h 17mMultiple Airlines
Deal found 30/7C$ 335
Sat 23/89:45 a.m.YUL - ORD
Nonstop2h 38mUnited Airlines
Sat 30/86:00 p.m.ORD - YUL
Nonstop2h 29mUnited Airlines
Deal found 30/7C$ 360
Mon 22/98:25 a.m.YTZ - ORD
2 stops14h 33mMultiple Airlines
Tue 23/95:17 p.m.ORD - YTZ
2 stops20h 28mMultiple Airlines
Deal found 30/7C$ 428
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to O'Hare Intl 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 31 July 2025.
Use the filters below to find and compare flights from Ontario to Chicago O'Hare Intl Airport that are best for you.
Fly from
Ontario
Fly to
O'Hare Intl
Route
Depart
Return
Price
TorontoChicago
YYZ - ORD
YYZORD
Toronto Pearson Intl
Fri 7/11
12:05 p.m.-1:01 p.m.
Nonstop1h 56m
Chicago O'Hare Intl
Sun 9/11
3:55 p.m.-6:34 p.m.
Nonstop1h 39m
C$ 203
TorontoChicago
YTZ - ORD
YTZORD
Toronto Island
Sat 13/9
3:25 p.m.-8:11 p.m.
1 stop5h 46m
Chicago O'Hare Intl
Sat 20/9
3:35 p.m.-9:34 p.m.
1 stop4h 59m
C$ 214
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
Thu 18/9
6:40 p.m.-8:11 p.m.
Nonstop2h 31m
Chicago O'Hare Intl
Mon 22/9
8:40 a.m.-11:57 a.m.
Nonstop2h 17m
C$ 241
TorontoChicago
YYZ - ORD
YYZORD
Toronto Pearson Intl
Thu 4/9
5:15 p.m.-6:12 p.m.
Nonstop1h 57m
Chicago O'Hare Intl
Sun 7/9
9:12 p.m.-11:58 p.m.
Nonstop1h 46m
C$ 251
TorontoChicago
YYZ - ORD
YYZORD
Toronto Pearson Intl
Wed 20/8
9:00 p.m.-10:07 p.m.
Nonstop2h 07m
Chicago O'Hare Intl
Tue 2/9
9:12 p.m.-11:58 p.m.
Nonstop1h 46m
C$ 261
TorontoChicago
YYZ - ORD
YYZORD
Toronto Pearson Intl
Tue 7/10
3:49 p.m.-9:10 p.m.
1 stop6h 21m
Chicago O'Hare Intl
Sun 12/10
5:22 a.m.-11:10 a.m.
1 stop4h 48m
C$ 270
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
Thu 4/9
7:50 a.m.-12:20 p.m.
1 stop5h 30m
Chicago O'Hare Intl
Sun 7/9
7:00 a.m.-10:57 p.m.
1 stop14h 57m
C$ 276
TorontoChicago
YYZ - ORD
YYZORD
Toronto Pearson Intl
Fri 12/9
4:12 p.m.-8:20 p.m.
1 stop5h 08m
Chicago O'Hare Intl
Sun 14/9
7:10 a.m.-3:22 p.m.
1 stop7h 12m
C$ 292
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
Thu 4/9
6:00 a.m.-1:09 p.m.
1 stop8h 09m
Chicago O'Hare Intl
Sat 13/9
10:30 a.m.-7:25 p.m.
1 stop7h 55m
C$ 297
MontrealChicago
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
Thu 4/9
4:55 p.m.-6:41 p.m.
Nonstop2h 46m
Chicago O'Hare Intl
Sun 7/9
8:40 a.m.-11:57 a.m.
Nonstop2h 17m
C$ 335
Showing 1-10 of 53 results
Best time to book a flight from Ontario to O'Hare Intl
Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Ontario 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 Ontario to Chicago O'Hare Intl Airport
What is the cheapest month to book a flight from Region of Ontario to Chicago O'Hare Intl Airport?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Chicago O'Hare Intl Airport (average of C$ 261). Flying from Region of Ontario to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 352). 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 ON to ORD?
Find hourly flight availability from Ontario to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 31 July 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to Chicago O'Hare Intl Airport as you normally would.
Weekly flight availability from Region of Ontario to Chicago O'Hare Intl Airport
Explore weekly flight availability from Ontario to O'Hare Intl. 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 31 July 2025.
The most flights from CAON to ORD are scheduled on a Thursday (60 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (32 on average).
Reviews of airlines servicing O'Hare Intl
Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated 31 July 2025.
Read reviews from past customers who have flown Delta,United Airlines, andAmerican Airlines from Ontario to Chicago O'Hare Intl Airport. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.9
Crew
8.5
Boarding
8.2
Overall
8.0
Food
7.3
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMichael,Jul 2025
AMS - ATL
Entertainment
7.9
Crew
8.5
Boarding
8.2
Overall
8.0
Food
7.3
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMichael,Jul 2025
AMS - ATL
Entertainment
7.9
Crew
8.5
Boarding
8.2
Overall
8.0
Food
7.3
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMichael,Jul 2025
AMS - ATL
Entertainment
7.9
Crew
8.5
Boarding
8.2
Overall
8.0
Food
7.3
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMichael,Jul 2025
AMS - ATL
Entertainment
7.9
Crew
8.5
Boarding
8.2
Overall
8.0
Food
7.3
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMichael,Jul 2025
AMS - ATL
Entertainment
7.9
Crew
8.5
Boarding
8.2
Overall
8.0
Food
7.3
Comfort
7.9
Reviews
1 / 20
8.0
ExcellentMichael,Jul 2025
AMS - ATL
Related info for your journey
Find useful and relevant information for your journey from Ontario to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Chicago O'Hare Intl Airport?
Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locationsElk Grove Village
Evanston
Des Plaines
Skokie
Downers Grove
Naperville
Bolingbrook
Romeoville
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Alternative routes for Ontario to O'Hare Intl
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Ontario to O'Hare Intl
Discover the top 5 airlines that operate flights from Ontario to O'Hare Intl. 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 31 July 2025.
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How does Cheapflights help users find flights from Ontario to O'Hare Intl?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to O'Hare Intl from Ontario today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Ontario to O'Hare Intl?
Cheapflights helps you find that perfect flight to O'Hare Intl from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Ontario to O'Hare Intl with no change fees?
Certainly. Search results for flights to O'Hare Intl from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Ontario to O'Hare Intl become cheaper?
Yes! Start tracking prices for Ontario to O'Hare Intl 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.