Cheap flights from Ontario to Chicago from C$ 137
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 Chicago departing on 12/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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American Airlines flights from Region of Ontario to Chicago O'Hare Intl Airport
Our best American Airlines deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets
Delta flights from Region of Ontario to Chicago O'Hare Intl Airport
Our best Delta deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets
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How to get the cheapest flight ticket from Region of Ontario to Chicago O'Hare Intl Airport
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 Chicago O'Hare Intl Airport?
In general, May is the cheapest month to fly from Region of Ontario to Chicago O'Hare Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 360. The month of November is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Region of Ontario averaging around C$ 380.
What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?
The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Friday when prices can be found for as low as C$ 784. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Region of Ontario to Chicago O'Hare Intl Airport for around C$ 1,305.
What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?
In the evening is the cheapest time of day to fly from Region of Ontario to Chicago O'Hare Intl Airport when you can find flight prices for as low as C$ 585. Flying to Chicago O'Hare Intl Airport in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are C$ 1,508 on average. Flights to Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl flight route?
Fly from Toronto Pearson Intl to Chicago O'Hare Intl for the best Ontario - Chicago O'Hare Intl flight prices
How far in advance should I book a flight to Chicago O'Hare Intl Airport?
You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Region of Ontario when booking 12 weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around C$ 404 when searching 12 weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Region of Ontario for as low as C$ 338 on momondo.
What cabin class options are available on Ontario to Chicago O'Hare Intl flights?
There are 4 cabin classes available to choose from on Ontario to Chicago O'Hare Intl 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 Chicago O'Hare Intl?
Air Canada, American Airlines, and United Airlines are the most popular carriers operating from Ontario to Chicago O'Hare Intl
Which airlines fly to Chicago O'Hare Intl Airport?
Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from Region of Ontario according to our data. Air Canada is the first choice among our users, with 75% of people opting to fly with this airline when travelling to Chicago O'Hare Intl Airport. Keep in mind that there are 5 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from Region of Ontario to Chicago O'Hare Intl Airport on average per day?
As of June 2025, there are 93 flights per day flying from Region of Ontario to Chicago O'Hare Intl Airport. The most common time of day flights depart is 6:00a.m., with 43% of flights taking off at noon.
How many flights depart from Region of Ontario to Chicago O'Hare Intl Airport on average per week?
As of June 2025, 651 flights take off from Region of Ontario and land in Chicago O'Hare Intl Airport each week. The most common flight departure day for this route is Wed, with 16% of weekly flights taking off on this day.
Cheap Region of Ontario to Chicago O'Hare Intl Airport flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Chicago O'Hare Intl Airport
When did momondo last update prices for flights from Ontario to Chicago O'Hare Intl Airport?
Prices for flights from Ontario to Chicago O'Hare Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Ontario to Chicago O'Hare Intl Airport?
There are 5 operators available for flights from Ontario to Chicago O'Hare Intl Airport as of June 2025.
How old do you have to be to fly from Ontario to Chicago O'Hare Intl Airport?
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 Chicago O'Hare Intl Airport.
What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?
The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Region of Ontario to Chicago O'Hare Intl Airport?
Based on momondo bookings for flights between Region of Ontario and Chicago O'Hare Intl Airport, the leading plane model is De Havilland (Bombardier) DHC-8-400 Dash 8Q, making up 15.86% of the total bookings. Other popular models include Embraer 175 (Enhanced Winglets) with 14.99%, Boeing 737-800 with 11.73%, and Airbus A220-300 with 8.37%.
Best airlines flying from Region of Ontario to Chicago O'Hare Intl Airport
Compare and see reviews for airlines that fly from Region of Ontario to Chicago O'Hare Intl Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 232 | Free Cancellation | Rating 8.0 289 reviews | |||
| PriceFrom C$ 278 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom C$ 283 | Free Cancellation | Rating 7.1 9,573 reviews | |||
| PriceFrom C$ 302 | Free Cancellation | Rating 7.4 8,810 reviews | |||
| PriceFrom C$ 423 | Free Cancellation | Rating 7.2 2,878 reviews |
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Why should I use momondo to find a flight deal from Ontario to Chicago?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Chicago for you.
Can I find flights from Ontario to Chicago with flexible booking policies on momondo?
Flights from Ontario to Chicago 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 Chicago?
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 Chicago from Ontario.
I’m not ready to book a flight from Ontario to Chicago right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Ontario to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.