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

View AU$155 flight on Sat, 4 Oct. 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Chicago O'Hare International Airport (ORD)

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun., 12 Oct. - Sun., 26 Oct.
ONT
Ontario
ORD
Chicago
AU$481 Return, found 6 days ago
AU$481
Return
found 6 days ago
Select United flight, departing Sun., 12 Oct. from Ontario to Chicago, returning Sun., 26 Oct., priced at AU$481 found 6 days ago
American Airlines
Sat., 27 Sep. - Sat., 11 Oct.
ONT
Ontario
ORD
Chicago
AU$687 Return, found 5 days ago
AU$687
Return
found 5 days ago
Select American Airlines flight, departing Sat., 27 Sep. from Ontario to Chicago, returning Sat., 11 Oct., priced at AU$687 found 5 days ago
United
Sun., 30 Nov. - Sun., 14 Dec.
ONT
Ontario
ORD
Chicago
AU$849 Return, found 6 days ago
AU$849
Return
found 6 days ago
Select United flight, departing Sun., 30 Nov. from Ontario to Chicago, returning Sun., 14 Dec., priced at AU$849 found 6 days ago
United
Fri., 25 Jul. - Mon., 28 Jul.
ONT
Ontario
ORD
Chicago
AU$892 Return, found 1 day ago
AU$892
Return
found 1 day ago
Select United flight, departing Fri., 25 Jul. from Ontario to Chicago, returning Mon., 28 Jul., priced at AU$892 found 1 day ago
Flight from Ontario to Chicago route information
Origin airport
Los Angeles - Ontario Intl.
Destination airport
O'Hare Intl.
Airlines serving
United
Return price
AU$481
Distance
2713 km
Average flight time
4 hours 3 mins

Your quick guide to flights from Ontario to Chicago

Pick up great flights from Ontario to Chicago

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Ontario to Chicago. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Ontario to Chicago that take around hours.

Find cheap flights from Ontario to Chicago

From the great flight deals with prices currently ranging from AU$481 to AU$892, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Ontario to Chicago around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Chicago is normally in October.

Reasons to book your flight from Ontario to Chicago with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Ontario to Chicago across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Chicago right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from ONT to O'Hare Airport?
If you’re planning on travelling from Los Angeles - Ontario Intl. Airport (ONT) to O’Hare Intl. Airport (ORD), round-trip flights start from AU$481. This price is based on fares available within the last 7 days on Expedia for flights departing within the next year, so don’t hang about. Book now and save yourself both money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Los Angeles - Ontario Intl. Airport (ONT) to O'Hare Airport?
This can differ between air carriers, as each one has its own terms and conditions. Visit the Customer Service Portal, where you’ll find easy instructions on how to cancel your flight online.
How do I find cheap flights from ONT to O'Hare Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for ONT to O’Hare Airport flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from Los Angeles - Ontario Intl. Airport (ONT) to O'Hare Intl. Airport (ORD)?
Expect to be cruising at altitude for a while, as the flight distance from Ontario Airport to ORD is 2 700 kilometres. Create a playlist of your favourite songs before you leave home to keep yourself entertained during your trip.
Which airlines fly direct from Ontario Airport to ORD?
If you want to travel straight from ONT to O’Hare Airport, you’ll have to book a flight with one or more stops. Unfortunately, there are no airlines that fly directly between these airports.
Are ONT to ORD flight tickets cheaper when they're purchased at the last minute?
Late planners can occasionally nab a bargain, with some super cheap fares from Ontario Airport to ORD showing up a few weeks before the date of departure. If you’d rather plan ahead of time, Expedia compares and updates all the best flight deals continuously — as early as a year in advance in some cases. It depends on the carrier though, as not all airlines release prices so far in advance.

Explore a world of travel with Expedia

Ontario Airports

Los Angeles

Los Angeles Intl. to Chicago
AU$276.60

Orange County

John Wayne to Chicago
AU$412.60

Long Beach

Long Beach Municipal to Chicago
AU$650.20

Burbank

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