Cheap flights from Ontario to Illinois from C$ 122
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Illinois departing on 9/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Early arrival? Instantly customize your resultsTrusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Ontario to Illinois
Cheap round-trip flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
Lufthansa flights from Region of Ontario to Illinois
Our best Lufthansa deals on Region of Ontario to Illinois flight tickets
Delta flights from Region of Ontario to Illinois
Our best Delta deals on Region of Ontario to Illinois flight tickets
See travel insights to Illinois from
How to get the cheapest flight ticket from Region of Ontario to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
In general, March is the cheapest month to fly from Region of Ontario to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 349. If you don’t want to visit Illinois in March, then you should wait until April to fly from Region of Ontario, when ticket prices are also cheap, with an average price of C$ 349.
What is the cheapest day to depart on your flight to Illinois?
According to our data, Friday is the cheapest day to fly to Illinois from Region of Ontario. The lowest ticket price found for a Friday departure recently was C$ 883. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Illinois is Tuesday, with ticket prices averaging around C$ 1,400.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Region of Ontario to Illinois during this time can be as low as C$ 586. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are C$ 1,608 on average. Flights to Illinois from Region of Ontario in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.
What is the cheapest Ontario to Illinois flight route?
Fly from Toronto Island to Chicago Midway for the best Ontario - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Region of Ontario when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around C$ 420 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Region of Ontario for as low as C$ 364 on momondo.
What cabin class options are available on Ontario to Illinois flights?
There are 4 cabin classes available to choose from on Ontario to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Ontario to Illinois?
Porter Airlines, Air Canada, and American Airlines are the most popular carriers operating from Ontario to Illinois
Which airlines fly to Illinois?
Air Canada, United Airlines and Porter Airlines are the top three most popular airlines that fly to Illinois from Region of Ontario according to our data. Air Canada is the first choice among our users, with 65% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Region of Ontario to Illinois on average per day?
As of April 2025, 93 flights take off from Region of Ontario and land in Illinois each day. The most common flight departure time for this route is 6:00a.m., with 44% of daily flights taking off at noon.
How many flights depart from Region of Ontario to Illinois on average per week?
651 flights are operational weekly from Region of Ontario to Illinois as of April 2025. The most popular departure day for this route is Tue, with 16% of flights per week taking off on this day.
Cheap Region of Ontario to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Illinois
Best price found | C$ 122 |
|---|---|
Fastest flight time | 1h 49m |
Direct flights | Every day |
Airports in Illinois | 2 airports |
When did momondo last update prices for flights from Ontario to Illinois?
Prices for flights from Ontario to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario to Illinois?
There are 5 operators available for flights from Ontario to Illinois as of April 2025.
How old do you have to be to fly from Ontario to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Region of Ontario to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Region of Ontario to Illinois is De Havilland (Bombardier) DHC-8-400 Dash 8Q, representing 15.55% of all bookings. The subsequent popular models are Embraer 175 (Enhanced Winglets) at 12.21%, Embraer 195 E2 at 9.34%, and Boeing 737 MAX 8 at 9.24%.
Best airlines flying from Region of Ontario to Illinois
Compare and see reviews for airlines that fly from Region of Ontario to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 260 | Free Cancellation | Rating 8.0 284 reviews | |||
| PriceFrom C$ 302 | Free Cancellation | Rating 7.0 9,189 reviews | |||
| PriceFrom C$ 308 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom C$ 330 | Free Cancellation | Rating 7.4 8,685 reviews | |||
| PriceFrom C$ 429 | Free Cancellation | Rating 7.2 2,815 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to Illinois?
It is quick and easy to find Ontario to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.
Can I find flights from Ontario to Illinois with flexible booking policies on momondo?
Flights from Ontario to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Ontario to Illinois?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Ontario.
I’m not ready to book a flight from Ontario to Illinois right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Illinois from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.