S$203 Cheap Flights from Chicago to Ontario

View S$203 flight on Thu, 14 Aug, 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 40% on select hotels after you book a flight*
  • payments icon
    Earn twice
    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Chicago to Ontario (ORD-ONT)

Prices were available within the past 7 days and start at S$203 for one-way flights and S$405 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 14 Aug - Thu, 21 Aug
ORD
Chicago
ONT
Ontario
S$405 Return, found 2 days ago
S$405
Return
found 2 days ago
Select Delta flight, departing Thu, 14 Aug from Chicago to Ontario, returning Thu, 21 Aug, priced at S$405 found 2 days ago
United
Thu, 14 Aug - Thu, 21 Aug
ORD
Chicago
ONT
Ontario
S$450 Return, found 2 days ago
S$450
Return
found 2 days ago
Select United flight, departing Thu, 14 Aug from Chicago to Ontario, returning Thu, 21 Aug, priced at S$450 found 2 days ago
United
Thu, 14 Aug - Thu, 21 Aug
ORD
Chicago
ONT
Ontario
S$463 Return, found 2 days ago
S$463
Return
found 2 days ago
Select United flight, departing Thu, 14 Aug from Chicago to Ontario, returning Thu, 21 Aug, priced at S$463 found 2 days ago
Delta
Thu, 14 Aug - Thu, 21 Aug
ORD
Chicago
ONT
Ontario
S$464 Return, found 2 days ago
S$464
Return
found 2 days ago
Select Delta flight, departing Thu, 14 Aug from Chicago to Ontario, returning Thu, 21 Aug, priced at S$464 found 2 days ago
United
Thu, 14 Aug - Thu, 21 Aug
ORD
Chicago
ONT
Ontario
S$469 Return, found 2 days ago
S$469
Return
found 2 days ago
Select United flight, departing Thu, 14 Aug from Chicago to Ontario, returning Thu, 21 Aug, priced at S$469 found 2 days ago
Delta
Mon, 11 Aug - Mon, 18 Aug
ORD
Chicago
ONT
Ontario
S$471 Return, found 5 days ago
S$471
Return
found 5 days ago
Select Delta flight, departing Mon, 11 Aug from Chicago to Ontario, returning Mon, 18 Aug, priced at S$471 found 5 days ago
Delta
Thu, 14 Aug - Thu, 21 Aug
ORD
Chicago
ONT
Ontario
S$482 Return, found 2 days ago
S$482
Return
found 2 days ago
Select Delta flight, departing Thu, 14 Aug from Chicago to Ontario, returning Thu, 21 Aug, priced at S$482 found 2 days ago
Delta
Thu, 14 Aug - Thu, 21 Aug
ORD
Chicago
ONT
Ontario
S$485 Return, found 2 days ago
S$485
Return
found 2 days ago
Select Delta flight, departing Thu, 14 Aug from Chicago to Ontario, returning Thu, 21 Aug, priced at S$485 found 2 days ago
United
Thu, 14 Aug - Thu, 21 Aug
ORD
Chicago
ONT
Ontario
S$492 Return, found 2 days ago
S$492
Return
found 2 days ago
Select United flight, departing Thu, 14 Aug from Chicago to Ontario, returning Thu, 21 Aug, priced at S$492 found 2 days ago
American Airlines
Thu, 14 Aug - Thu, 21 Aug
ORD
Chicago
ONT
Ontario
S$513 Return, found 2 days ago
S$513
Return
found 2 days ago
Select American Airlines flight, departing Thu, 14 Aug from Chicago to Ontario, returning Thu, 21 Aug, priced at S$513 found 2 days ago

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

September is typically the cheapest month to fly

From S$151 - S$424 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.
Return price
S$404
Distance
2713 km
Average flight time
2 hours 55 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 Delta, United, 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$203 and roundtrip prices from S$405*.
 

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 Los Angeles. 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$405. 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$327.80

Orange County

Chicago to Los Angeles Intl.
S$353.60

Long Beach

Chicago to Long Beach Municipal
S$391.20

Burbank

Chicago Airports

Chicago

*Available to Expedia members.