Cheap flights from Ontario to Chicago from $116
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 6/5. 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 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 Chicago
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
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
WestJet flights from Region of Ontario to Chicago O'Hare Intl Airport
Our best WestJet deals on Region of Ontario to Chicago O'Hare Intl Airport flight tickets
See travel insights to Chicago from
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?
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 $280.
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 $423. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from Region of Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $762.
What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?
Flying to Chicago O'Hare Intl Airport from Region of Ontario in the evening is the least expensive time of day to depart. momondo users have found prices as low as $350 when looking at flights departing in the evening. Try not to purchase tickets in the afternoon because they tend to be around $691. Of course, these prices can vary depending on the time of year and what airport you fly to.
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 16 weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $302 when searching 16 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 $263 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 Delta are the most popular carriers operating from Ontario to Chicago O'Hare Intl
What airlines fly to Chicago O'Hare Intl Airport?
Air Canada, American Airlines and United 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 51% of people opting to fly with this airline when traveling to Chicago O'Hare Intl Airport. Keep in mind that there are 3 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?
70 flights are operational daily from Region of Ontario to Chicago O'Hare Intl Airport as of May 2025. The most popular departure time for this route is 6:00AM, with 42% of flights per day taking off at noon.
How many flights depart from Region of Ontario to Chicago O'Hare Intl Airport on average per week?
The number of flights available between Region of Ontario and Chicago O'Hare Intl Airport is 493 per week as of May 2025. The most frequent departure day is Wed, with 19% of weekly flights leaving 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 were last updated today.
How many operators does momondo search for flights from Ontario to Chicago O'Hare Intl Airport?
As of May 2025, there are 4 operators available to choose from for flights from Ontario to Chicago O'Hare Intl Airport.
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 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 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 Embraer 175 (Enhanced Winglets), making up 13.68% of the total bookings. Other popular models include De Havilland (Bombardier) DHC-8-400 Dash 8Q with 13.38%, Embraer 195 E2 with 9.62%, and Airbus A220-300 with 8.22%.
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 $202 | Free Cancellation | Rating 7.0 9,252 reviews | |||
| PriceFrom $225 | Free Cancellation | Rating 7.4 8,696 reviews | |||
| PriceFrom $230 | Free Cancellation | Rating 7.2 10,000 reviews |
Traveling to a place near Chicago?
Book flights to Chicago if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ontario to Chicago?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Chicago. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Ontario to Chicago with flexible booking policies on momondo?
All flight searches from Ontario to Chicago on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Ontario to Chicago?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Chicago.
I’m not ready to book a flight from Ontario to Chicago right now. Can momondo alert me if prices change?
Price alerts on flights to Chicago 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.