Cheap flights from Ontario to Illinois from $117
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 2/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted 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
Cheap bus & train deals from Ontario to Illinois
All round-trip flight deals from Ontario to Illinois
Air Canada flights from Region of Ontario to Illinois
Our best Air Canada deals on Region of Ontario to Illinois flight tickets
United Airlines flights from Region of Ontario to Illinois
Our best United Airlines 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?
The cheapest month to fly to Illinois from Region of Ontario is in April. Flight prices, which tend to average around $239, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of April, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $242.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Region of Ontario to Illinois is on a Wednesday when prices can be found for as low as $269. Flights from Region of Ontario to Illinois on a Tuesday will generally be more expensive and average around $323. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
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 morning. Flights from Region of Ontario to Illinois during this time can be as low as $279. Flights in the afternoon are often more expensive with an average ticket price of $335.
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 18 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $304 when searching 18 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 $266 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 United Airlines are the most popular carriers operating from Ontario to Illinois
What airlines fly to Illinois?
Air Canada, American Airlines and United 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 50% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 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 January 2025, there are 71 flights per day flying from Region of Ontario to Illinois. The most common time of day flights depart is 6:00AM, with 53% of flights taking off at noon.
How many flights depart from Region of Ontario to Illinois on average per week?
As of January 2025, there are 503 flights per week flying from Region of Ontario to Illinois. The most common day of the week flights depart is Wed, with 16% of flights 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
When did momondo last update prices for flights from Ontario to Illinois?
Prices for flights from Ontario to Illinois were last updated today.
How many operators does momondo search for flights from Ontario to Illinois?
The number of operators available for flights from Ontario to Illinois is 6 as of January 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 offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify 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 required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable 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 18.08% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 16.02%, Boeing 737-800 at 11.02%, and Embraer 175 (Enhanced Winglets) at 8.99%.
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 $206 | Free Cancellation | Rating 7.0 8,587 reviews | |||
| PriceFrom $209 | Free Cancellation | Rating 7.9 276 reviews | |||
| PriceFrom $219 | Free Cancellation | Rating 7.4 8,964 reviews | |||
| PriceFrom $238 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to Illinois?
Finding the right flight to Illinois from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.
Can I find flights from Ontario to Illinois with flexible booking policies on momondo?
momondo does allow users to show only those flights to Illinois from Ontario which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Ontario to Illinois?
momondo provides multiple filters to help you find the best flight to Illinois from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Ontario to Illinois right now. Can momondo alert me if prices change?
Price alerts on flights to Illinois from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.