S$164 Cheap Flights from Chicago to Ontario

View S$164 flight on Sat, 23 Aug, 2025Opens in a new window

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

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Cheap Flights from Chicago to Ontario (ORD-ONT)

Prices were available within the past 7 days and start at S$164 for one-way flights and S$327 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, 23 Aug - Sat, 30 Aug
ORD
Chicago
ONT
Ontario
S$327 Return, found 1 day ago
S$327
Return
found 1 day ago
Select United flight, departing Sat, 23 Aug from Chicago to Ontario, returning Sat, 30 Aug, priced at S$327 found 1 day ago
United
Sat, 23 Aug - Wed, 27 Aug
ORD
Chicago
ONT
Ontario
S$329 Return, found 6 hours ago
S$329
Return
found 6 hours ago
Select United flight, departing Sat, 23 Aug from Chicago to Ontario, returning Wed, 27 Aug, priced at S$329 found 6 hours ago
Delta
Sat, 23 Aug - Wed, 27 Aug
ORD
Chicago
ONT
Ontario
S$329 Return, found 6 hours ago
S$329
Return
found 6 hours ago
Select Delta flight, departing Sat, 23 Aug from Chicago to Ontario, returning Wed, 27 Aug, priced at S$329 found 6 hours ago
United
Sat, 23 Aug - Wed, 27 Aug
ORD
Chicago
ONT
Ontario
S$341 Return, found 6 hours ago
S$341
Return
found 6 hours ago
Select United flight, departing Sat, 23 Aug from Chicago to Ontario, returning Wed, 27 Aug, priced at S$341 found 6 hours ago
American Airlines
Sat, 23 Aug - Wed, 27 Aug
ORD
Chicago
ONT
Ontario
S$341 Return, found 6 hours ago
S$341
Return
found 6 hours ago
Select American Airlines flight, departing Sat, 23 Aug from Chicago to Ontario, returning Wed, 27 Aug, priced at S$341 found 6 hours ago
American Airlines
Sat, 23 Aug - Wed, 27 Aug
ORD
Chicago
ONT
Ontario
S$352 Return, found 6 hours ago
S$352
Return
found 6 hours ago
Select American Airlines flight, departing Sat, 23 Aug from Chicago to Ontario, returning Wed, 27 Aug, priced at S$352 found 6 hours ago
Delta
Sat, 23 Aug - Wed, 27 Aug
ORD
Chicago
ONT
Ontario
S$355 Return, found 6 hours ago
S$355
Return
found 6 hours ago
Select Delta flight, departing Sat, 23 Aug from Chicago to Ontario, returning Wed, 27 Aug, priced at S$355 found 6 hours ago
United
Sat, 23 Aug - Wed, 27 Aug
ORD
Chicago
ONT
Ontario
S$365 Return, found 6 hours ago
S$365
Return
found 6 hours ago
Select United flight, departing Sat, 23 Aug from Chicago to Ontario, returning Wed, 27 Aug, priced at S$365 found 6 hours ago
American Airlines
Sat, 23 Aug - Wed, 27 Aug
ORD
Chicago
ONT
Ontario
S$366 Return, found 6 hours ago
S$366
Return
found 6 hours ago
Select American Airlines flight, departing Sat, 23 Aug from Chicago to Ontario, returning Wed, 27 Aug, priced at S$366 found 6 hours ago
United
Sat, 23 Aug - Wed, 27 Aug
ORD
Chicago
ONT
Ontario
S$367 Return, found 6 hours ago
S$367
Return
found 6 hours ago
Select United flight, departing Sat, 23 Aug from Chicago to Ontario, returning Wed, 27 Aug, priced at S$367 found 6 hours ago
American Airlines
Sat, 23 Aug - Wed, 27 Aug
ORD
Chicago
ONT
Ontario
S$379 Return, found 6 hours ago
S$379
Return
found 6 hours ago
Select American Airlines flight, departing Sat, 23 Aug from Chicago to Ontario, returning Wed, 27 Aug, priced at S$379 found 6 hours ago

Find the cheapest month to fly from Chicago (ORD) to Ontario (ONT)

October is typically the cheapest month to fly

From S$151 - S$409 per traveller.

Graph displaying average flight prices per month

Chicago to Ontario route information
Origin airport
O'Hare Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
American Airlines, Delta, United
Return price
S$326
Distance
2713 km
Average flight time
3 hours 8 mins

Perfect flights from Chicago to Ontario

Your Journey from Chicago to Ontario

Start your unforgettable journey with Expedia. Our broad selection of flights from Chicago to Ontario caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including United, Delta, American Airlines. Our selection of flights from O'Hare Intl. to Los Angeles - Ontario Intl. caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Chicago to Ontario Flights

Experience the joy of finding cheap flights from O'Hare Intl. to Los Angeles - Ontario Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$164 and roundtrip prices from S$327*.
 

Pre-Flight Essentials

Ensure a smooth journey from Chicago to Ontario with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant Ontario

Picture yourself stepping off the plane in Ontario and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your Chicago to Ontario Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Chicago to Ontario.
 

Beyond the Flight – Exploring Ontario

With Expedia, your adventure extends beyond the flight. Explore Ontario at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Chicago to Ontario with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Chicago to Ontario with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

Frequently asked questions

How much is a flight from ORD to ONT?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip flight from O'Hare Intl. Airport (ORD) to ONT was S$327. Fares this cheap don't hang around, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from O'Hare Intl. Airport (ORD) to Los Angeles - Ontario Intl. Airport (ONT)?
Each air carrier has its own terms and conditions. If you do decide to cancel, follow the simple instructions on our Customer Service Portal.
How do I find cheap flights from O'Hare Airport to ONT 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 ORD to ONT flights, you'll see a "no change fees" filter for you to select.
How far is the flight from O'Hare Intl. Airport (ORD) to ONT?
The flight distance from O'Hare Intl. Airport (ORD) to Los Angeles - Ontario Intl. Airport (ONT) is 2,700 kilometres. Listen to some music or bury your nose in a book and the journey will zip on by.
Which airlines fly direct from ORD to Ontario Airport?
Direct flights aren't available, so you'll have to make at least one stop between ORD and ONT. Use the layover time to stretch your legs and take a break.
Are O'Hare Airport to Los Angeles - Ontario Intl. Airport (ONT) flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can sometimes pick up a bargain, with some of the cheapest fares from O'Hare Intl. Airport (ORD) to Los Angeles - Ontario Intl. Airport (ONT) emerging a few weeks prior to the departure date. If you'd rather plan ahead, Expedia compares and updates the best flight deals continuously --- as early as 12 months in advance in some cases. It depends on the carrier though, as not all airlines quote prices so far in advance.

Explore a world of travel with Expedia

Ontario Airports

Los Angeles

Chicago to Los Angeles Intl.
S$321.70

Orange County

Chicago to John Wayne
S$328.90

Long Beach

Chicago to Long Beach Municipal
S$431.00

Burbank

*Available to Expedia members.