£104 Cheap Flights from Ontario Intl. Airport (ONT) to Chicago (ORD)

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Compare flights from Ontario Intl. Airport to Chicago easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Ontario Intl. Airport to Chicago. Operating between them 1 flights per day, 4 airlines cover the route. And United Airlines fly direct, getting you to O'Hare Intl. in just 4hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Ontario Intl. Airport to O'Hare Intl..

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.

Grab a great deal on your flight from Ontario Intl. Airport (ONT) to O'Hare Intl. (ORD)

The easiest way to view the best deals on flights from Ontario Intl. Airport to Chicago today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Ontario Intl. Airport to O'Hare Intl. start at just £209 and range up to £261.

To find an even better deal, try

• being flexible on your dates – midweek flights can be cheaper
• looking for other airports near Ontario Intl. Airport and Chicago
• booking your flight during February, the cheapest month on this route
• varying your flight times – early morning and late at night are sometimes cheaper

Why you should book your Ontario Intl. Airport to Chicago flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Ontario Intl. Airport to O'Hare Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.

Frequently Asked Questions

How much does a flight from Ontario Intl. Airport (ONT) to Chicago, IL (ORD-O'Hare Intl.) cost?

You can find one-way and return flights from ONT to ORD with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when ONT to ORD ticket fares go up or down.

What is the cheapest month to fly from Ontario Intl. Airport (ONT) to Chicago, IL (ORD)?

The cheapest months to fly from Ontario Intl. Airport (ONT) to Chicago, IL (ORD) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.

Which airlines fly direct from Ontario Intl. Airport (ONT) to Chicago, IL (ORD)?

Enter ONT to ORD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.

What is the cheapest airline that flies from Ontario Intl. Airport (ONT) to Chicago, IL (ORD-O'Hare Intl.)?

United also offers one of the cheapest connecting return flights on this route, with prices starting from around £367. Airport (ONT) to Chicago, IL (ORD-O'Hare Intl.), with prices starting from around £396 for flights that can be booked for departure within the next year. United is one of the cheapest airlines offering nonstop return flights from Ontario Intl. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.

How do I find cheap flights from Ontario Intl. Airport (ONT) to Chicago, IL (ORD)?

To find a cheap flight from Ontario Intl. Airport (ONT) to Chicago, IL (ORD), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

What is the best time to fly from Ontario Intl. Airport (ONT) to Chicago, IL (ORD)?

The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

What is the earliest flight from Ontario Intl. Airport (ONT) to Chicago, IL (ORD)?

Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from Ontario Intl. Airport (ONT) to Chicago, IL (ORD). To compare more early flights, use the "Early Morning" and "Morning" filters in your search.

How long does it take to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Chicago, IL (ORD-O'Hare Intl.)?

Direct flights from ONT to ORD usually take about 4 hours, traveling roughly 2,729 kilometers. If you opt for a connecting flight, expect to add around 5 hours to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.

Can you fly business or first class from Ontario Intl. Airport (ONT) to Chicago, IL (ORD)?

Select the "Business class" and "First class" filters when looking for Ontario Intl. Airport (ONT) to Chicago, IL (ORD) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.

How do I earn miles on a Ontario Intl. Airport (ONT) to Chicago, IL (ORD) flight with Expedia?

It's easy to earn miles on a Ontario Intl. Airport (ONT) to Chicago, IL (ORD) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

Is it cheaper to buy a plane ticket from Ontario Intl. Airport (ONT) to Chicago, IL (ORD) at the last minute?

Typically, booking a last minute flight from Ontario Intl. Airport (ONT) to Chicago, IL (ORD) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Is it cheaper to book a Ontario Intl. Airport (ONT) to Chicago, IL (ORD) flight and hotel package?

Securing a Ontario Intl. Airport (ONT) to Chicago, IL (ORD) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

Can I cancel or change the date of my flight from Ontario Intl. Airport (ONT) to Chicago, IL (ORD)?

If you booked your Ontario Intl. Airport (ONT) to Chicago, IL (ORD) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.