Cheap Flights from Chicago (ORD) to Ontario (ONO)

Popular airlines from Chicago O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal)

Frequently asked questions

How much does a flight from O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal) cost?
Secure a cheap one-way flight or cheap return flight from O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal)?
The cheapest month to fly from ORD to ONO is , when there's less demand. Off-peak season is typically when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from ORD to ONO. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal)?
Direct flights from O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ORD to ONO?
Usually you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* But this can vary depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal)?
To avoid possible delays on the O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal) route, fly before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Ontario from O'Hare Intl. Airport (ORD)?
Check out your flight options from O'Hare Intl. Airport (ORD) to Boise Airport (BOI). This is the only airport in Ontario you can jet into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal) last-minute?
Waiting until just before your trip to book a ticket from ORD to ONO often results in higher prices. Although you may find some last-minute deals, they aren't always guaranteed. Be flexible with your itinerary for a better chance of landing a bargain.
Is it cheaper to book an ORD to ONO flight and hotel package?
You'll typically save money by booking an ORD to ONO flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. Once you've selected your ideal accommodations and flights, consider other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Ontario, OR (ONO-Ontario Municipal)?
In most instances, you can modify or cancel your ORD to ONO flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you need further details, go to our Customer Service portal.

Travel information

Origin airport
O'Hare Intl.
Destination airport
Ontario Municipal
Distance
1469 mi

Book with confidence

Chicago to Ontario Flights

The cheapest times to fly from Chicago to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Chicago to Ontario are during the month of . You can find some of the cheapest flights from Chicago to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Chicago to Ontario

Sunday is one of the best days to book for cheap flights from Chicago to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Chicago to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Chicago to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Chicago to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Chicago to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Chicago to Ontario Flights

Explore a world of travel with Expedia

*Available to One Key members.