Cheap flights from Ontario to Illinois from C$ 193
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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Ontario to Illinois
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (CAON) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 January 2025.
Find flight deals from Ontario to Illinois
Cheapest flights from Ontario to IllinoisExplore the most affordable flight options available from Ontario to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.
Explore the most affordable flight options available from Ontario to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.
Find flights from Ontario to Illinois within your budget
Customize your flight search to find flights from Ontario to Illinois 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 21 January 2025.
Fly from
Fly to
Route
Depart
Return
Price
TorontoChicago
YYZ - ORD
YYZORD
Toronto Pearson Intl
Thu 13/2
8:10 a.m.-12:59 p.m.
1 stop5h 49m
Chicago O'Hare Intl
Sun 16/2
2:05 p.m.-4:46 p.m.
Nonstop1h 41m
TorontoChicago
YTZ - MDW
YTZMDW
Toronto Island
Thu 13/2
11:20 a.m.-12:10 p.m.
Nonstop1h 50m
Chicago Midway
Mon 17/2
1:05 p.m.-3:47 p.m.
Nonstop1h 42m
TorontoChicago
YYZ - ORD
YYZORD
Toronto Pearson Intl
Sat 1/3
6:20 p.m.-7:20 p.m.
Nonstop2h 00m
Chicago O'Hare Intl
Wed 5/3
8:11 a.m.-10:51 a.m.
Nonstop1h 40m
TorontoChicago
YTZ - ORD
YTZORD
Toronto Island
Wed 16/4
12:25 p.m.-6:21 p.m.
1 stop6h 56m
Chicago O'Hare Intl
Sun 20/4
1:55 p.m.-9:35 p.m.
1 stop6h 40m
TorontoChicago
YTZ - MDW
YTZMDW
Toronto Island
Thu 13/2
11:20 a.m.-12:10 p.m.
Nonstop1h 50m
Chicago Midway
Wed 19/2
1:05 p.m.-3:47 p.m.
Nonstop1h 42m
OttawaChicago
YOW - MDW
YOWMDW
Ottawa
Sun 9/2
8:35 a.m.-12:10 p.m.
1 stop4h 35m
Chicago Midway
Thu 13/2
1:05 p.m.-8:34 p.m.
1 stop6h 29m
TorontoChicago
YTZ - MDW
YTZMDW
Toronto Island
Wed 26/2
11:20 a.m.-6:23 p.m.
1 stop8h 03m
Chicago Midway
Sun 2/3
11:15 a.m.-1:57 p.m.
Nonstop1h 42m
TorontoChicago
YYZ - ORD
YYZORD
Toronto Pearson Intl
Wed 12/2
6:40 p.m.-7:37 p.m.
Nonstop1h 57m
Chicago O'Hare Intl
Sat 22/2
9:50 a.m.-12:25 p.m.
Nonstop1h 35m
TorontoChicago
YTZ - ORD
YTZORD
Toronto Island
Tue 18/2
2:00 p.m.-10:40 a.m.
2 stops21h 40m
Chicago O'Hare Intl
Tue 25/2
7:10 a.m.-10:23 p.m.
2 stops14h 13m
TorontoChicago
YYZ - ORD
YYZORD
Toronto Pearson Intl
Thu 13/2
6:00 a.m.-9:16 a.m.
1 stop4h 16m
Chicago O'Hare Intl
Sat 15/2
4:58 p.m.-10:49 p.m.
1 stop4h 51m
Best time to book a flight from Ontario to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Ontario with our price prediction graph.
Travel insights for flights from Ontario to Illinois
Get recent, data-driven insights about flights from Ontario to Illinois including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from Region of Ontario to Illinois?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Illinois (average of C$ 261). Flying from Region of Ontario to Illinois in March is currently the most expensive (average of C$ 355). 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 IL?
Find hourly flight availability from Ontario to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 January 2025.
When flying from Region of Ontario to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from Region of Ontario to Illinois
Explore weekly flight availability from Ontario to Illinois. 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 21 January 2025.
The most flights from CAON to USIL are scheduled on a Monday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (33 on average).
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated 21 January 2025.
To help decide which airline to fly from Ontario to Illinois, see what other customers have to say about Air Canada, WestJet and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Overall
Food
Comfort
Crew
Entertainment
Reviews
Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Boarding
Overall
Food
Comfort
Crew
Entertainment
Reviews
Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Boarding
Overall
Food
Comfort
Crew
Entertainment
Reviews
Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Boarding
Overall
Food
Comfort
Crew
Entertainment
Reviews
Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Boarding
Overall
Food
Comfort
Crew
Entertainment
Reviews
Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Boarding
Overall
Food
Comfort
Crew
Entertainment
Reviews
Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Related info for your journey
Find useful and relevant information for your journey from Ontario to Illinois. 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
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Alternative routes for Ontario to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Ontario to Illinois
Discover the top 5 airlines that operate flights from Ontario to Illinois. 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 21 January 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 Ontario to Illinois?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Illinois. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from Ontario to Illinois?
It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario to Illinois.
Can Cheapflights find flights from Ontario to Illinois with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Illinois flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Ontario to Illinois become cheaper?
Yes, Cheapflights offers price alerts on Ontario to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.