Cheap flights from Ontario to Illinois from C$ 166
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 2/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
How far in advance should I book a flight from Region of Ontario to Illinois?
To save on the cost of your flight from Region of Ontario to Illinois, book at least 38 days before your planned departure. Booking around this time can save you about 92% on the cost of this flight compared to booking a flight leaving this week. We have found prices from C$ 432 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as C$ 670.
What is the cheapest month to fly from Region of Ontario to Illinois?
April is one of the best times of the year to fly to Illinois from Region of Ontario. Prices for April average C$ 387 per person but you can even find prices for as low as C$ 264. The most expensive prices can be found in the month of September. Opting for a April flight can save you 16% on your journey compared to booking in September
What is the cheapest time of day to fly from ON to IL?
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.
Cheap WestJet flights from Ontario to Illinois
Explore cheap flight options specifically provided by WestJet for the route between Ontario and Illinois. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 432,781 searches. Data last updated 2 July 2024.
Check out some of the cheapest WestJet flights we've come across from Ontario to Illinois. Make sure to double check the flight details before booking.
Cheap Air Canada flights from Ontario to Illinois
Explore cheap flight options specifically provided by Air Canada for the route between Ontario and Illinois. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 432,781 searches. Data last updated 2 July 2024.
Take a gander at the lowest prices we've found on Air Canada flights from Ontario to Illinois. Check back soon if you're not seeing flights that suit your needs.
Cheap Ontario to Illinois flights in July & August 2024
Find cheap flight options from Ontario to Illinois specifically for the months of July and August 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 432,781 searches. Prices were last updated on 2 July 2024.
The lowest fares we've come across on flights travelling from Ontario to Illinois in July and August 2024. More deals are always being added, so be sure to check back regularly.
Ontario to Illinois 2024 flight deals
Discover exclusive flight deals for travel between Ontario and Illinois in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 432,781 searches. Data last updated 2 July 2024.
The lowest fares we've come across on flights travelling from Ontario to Illinois in July and August 2024. More deals are always being added, so be sure to check back regularly.
Direct flights to Illinois from Ontario
Discover non-stop flight options from Ontario to Illinois. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 432,781 searches. Data last updated 2 July 2024.
To help reduce your travel time, choose from one of these non-stop flights from Ontario to Illinois. Select from other flights from Ontario to Illinois by using the search form above.
Ontario to Illinois flights leaving soon
Find last-minute flight options from Ontario to Illinois for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 432,781 searches. Data last updated 2 July 2024.
Users seeking a last-minute flight from Ontario to Illinois should consider booking one of these fares. It's wise to confirm all flight details are correct before booking.
One-way flights to Illinois from Ontario
Search for one-way flight options from Ontario to Illinois. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 432,781 searches. Data last updated 2 July 2024.
If you're seeking multiple options on one-way flights from Ontario to Illinois, be sure to check out these deals, which are updated often. Users in need of a round-trip flight from Ontario to Illinois instead should update the search form at the top of page.
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 432,781 searches. Data last updated 2 July 2024.
Fly from
Fly to
Budget
C$ 267 - C$ 510
Route
Depart
Return
Price
Toronto IslandChicago Midway
YTZ - MDW
YTZMDW
Toronto Island
Fri 26/7
Nonstop1h 47m
Chicago Midway
Mon 29/7
Nonstop1h 42m
Toronto Pearson IntlChicago O'Hare Intl
YYZ - ORD
YYZORD
Toronto Pearson Intl
Thu 25/7
Nonstop1h 57m
Chicago O'Hare Intl
Sun 28/7
Nonstop1h 48m
Toronto Pearson IntlChicago O'Hare Intl
YYZ - ORD
YYZORD
Toronto Pearson Intl
Fri 23/8
1 stop6h 12m
Chicago O'Hare Intl
Sun 25/8
Nonstop1h 48m
Toronto Pearson IntlChicago O'Hare Intl
YYZ - ORD
YYZORD
Toronto Pearson Intl
Wed 18/9
1 stop11h 35m
Chicago O'Hare Intl
Sun 22/9
1 stop21h 31m
Toronto Pearson IntlChicago O'Hare Intl
YYZ - ORD
YYZORD
Toronto Pearson Intl
Tue 13/8
Nonstop1h 54m
Chicago O'Hare Intl
Tue 20/8
1 stop6h 34m
Toronto IslandChicago Midway
YTZ - MDW
YTZMDW
Toronto Island
Thu 1/8
Nonstop1h 47m
Chicago Midway
Sun 4/8
Nonstop1h 42m
Toronto Pearson IntlChicago O'Hare Intl
YYZ - ORD
YYZORD
Toronto Pearson Intl
Wed 28/8
1 stop4h 01m
Chicago O'Hare Intl
Tue 10/9
1 stop6h 08m
Montreal Pierre Elliott Trudeau IntlChicago O'Hare Intl
YUL - ORD
YULORD
Montreal Pierre Elliott Trudeau Intl
Tue 20/8
1 stop5h 59m
Chicago O'Hare Intl
Fri 23/8
1 stop14h 40m
Toronto IslandChicago Midway
YTZ - MDW
YTZMDW
Toronto Island
Mon 15/7
Nonstop1h 47m
Chicago Midway
Thu 18/7
Nonstop1h 42m
No data available for this route at this time. Please check back soon.
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.
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 2 July 2024.
To help decide which airline to fly from Ontario to Illinois, see what other customers have to say about WestJet, Air Canada and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
Boarding
Entertainment
Food
Comfort
Overall
Reviews
A/C was not working on the ground so it was 110 degrees on the plane when we boarded and we sat there for almost 40 minutes because Austin’s gate system has not kept up with growth. Not Alaska’s fault 100% but it was miserable.
Crew
Boarding
Entertainment
Food
Comfort
Overall
Reviews
A/C was not working on the ground so it was 110 degrees on the plane when we boarded and we sat there for almost 40 minutes because Austin’s gate system has not kept up with growth. Not Alaska’s fault 100% but it was miserable.
Crew
Boarding
Entertainment
Food
Comfort
Overall
Reviews
A/C was not working on the ground so it was 110 degrees on the plane when we boarded and we sat there for almost 40 minutes because Austin’s gate system has not kept up with growth. Not Alaska’s fault 100% but it was miserable.
Crew
Boarding
Entertainment
Food
Comfort
Overall
Reviews
A/C was not working on the ground so it was 110 degrees on the plane when we boarded and we sat there for almost 40 minutes because Austin’s gate system has not kept up with growth. Not Alaska’s fault 100% but it was miserable.
Crew
Boarding
Entertainment
Food
Comfort
Overall
Reviews
A/C was not working on the ground so it was 110 degrees on the plane when we boarded and we sat there for almost 40 minutes because Austin’s gate system has not kept up with growth. Not Alaska’s fault 100% but it was miserable.
Crew
Boarding
Entertainment
Food
Comfort
Overall
Reviews
A/C was not working on the ground so it was 110 degrees on the plane when we boarded and we sat there for almost 40 minutes because Austin’s gate system has not kept up with growth. Not Alaska’s fault 100% but it was miserable.
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
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Ontario to IllinoisSee prices for flight routes from nearby airports that may be better suited for you.
See prices for flight routes from nearby airports that may be better suited for you.
Top 10 airlines flying from Ontario to Illinois
Discover the top 10 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 432,781 searches. Data last updated 2 July 2024.
Search flights from Ontario to Illinois by cabin class
Find flights from Ontario to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Hourly flight availability from Ontario to Illinois
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 2 July 2024.
| 16%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 19%of flight departures | Morning6 am to noon |
| 53%of flight departures | AfternoonNoon to 6 pm |
| 12%of flight departures | Evening6 pm to midnight |
Book a flight to one of these trending destinations
User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
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.