$114 Cheap United flights from Chicago to Ontario (ORD to ONT)

Find The Best Day To Fly from Chicago to Ontario

Amazing United ORD to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $227 round trip and $114 one way. Prices and availability subject to change. Additional terms may apply.

Fri, Aug 22 - Sun, Aug 24
ORD
Chicago
ONT
Ontario
$227 Roundtrip, found 21 hours ago
$227
Roundtrip
found 21 hours ago
Select United flight, departing Fri, Aug 22 from Chicago to Ontario, returning Sun, Aug 24, priced at $227 found 21 hours ago
Sun, Jun 1 - Mon, Jun 30
ORD
Chicago
ONT
Ontario
$231 Roundtrip, found 4 days ago
$231
Roundtrip
found 4 days ago
Select United flight, departing Sun, Jun 1 from Chicago to Ontario, returning Mon, Jun 30, priced at $231 found 4 days ago
Wed, Jul 2 - Thu, Jul 3
ORD
Chicago
ONT
Ontario
$237 Roundtrip, just found
$237
Roundtrip
just found
Select United flight, departing Wed, Jul 2 from Chicago to Ontario, returning Thu, Jul 3, priced at $237 just found
Tue, Jul 22 - Sat, Jul 26
ORD
Chicago
ONT
Ontario
$239 Roundtrip, found 3 days ago
$239
Roundtrip
found 3 days ago
Select United flight, departing Tue, Jul 22 from Chicago to Ontario, returning Sat, Jul 26, priced at $239 found 3 days ago
Tue, Jun 3 - Tue, Jun 10
ORD
Chicago
ONT
Ontario
$241 Roundtrip, found 5 days ago
$241
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jun 3 from Chicago to Ontario, returning Tue, Jun 10, priced at $241 found 5 days ago
Wed, Jun 18 - Tue, Jun 24
ORD
Chicago
ONT
Ontario
$241 Roundtrip, found 7 hours ago
$241
Roundtrip
found 7 hours ago
Select United flight, departing Wed, Jun 18 from Chicago to Ontario, returning Tue, Jun 24, priced at $241 found 7 hours ago

ONT From ORD Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
Motel 6 Ontario, CA - Convention Center - Airport

Motel 6 Ontario, CA - Convention Center - Airport

2 out of 5
per person
May 25 - Jun 1
found 1 day ago
Roundtrip flight included
Chicago (CHI) to Ontario (ONT)
Chino Motel

Chino Motel

2.5 out of 5
per person
May 25 - Jun 1
found 1 day ago
Roundtrip flight included
Chicago (CHI) to Ontario (ONT)
Welcome Inn

Welcome Inn

2 out of 5
per person
May 25 - Jun 1
found 1 day ago
Roundtrip flight included
Chicago (CHI) to Ontario (ONT)
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Frequently asked questions

Can I catch a flight from O'Hare Airport to ONT right now?
Be sure to check out our Covid-19 Travel Advisor to discover if there are any present quarantine requirements and travel advice reports in effect in Los Angeles - Ontario Intl. Airport (ONT) when flying from O’Hare Airport.
What terminal is United Airlines at O'Hare Airport?
Before you fly from O’Hare Airport to Los Angeles - Ontario Intl. Airport (ONT) with United Airlines, it might be a good idea to get in touch with the airline to find out your terminal information. While your boarding pass should have some of the relevant details, there’s no guarantee.
Are there United Airlines non-stop flights from ORD to ONT?
You won’t find any direct flights between O’Hare Intl. Airport (ORD) and Ontario Airport with United Airlines. You should be prepared to make at least one stopover if you need to stick to this airline and route.
How long is a United Airlines flight from ORD to ONT?
Depending on no delays and good weather, your United Airlines flight from O’Hare Intl. Airport (ORD) to Los Angeles - Ontario Intl. Airport (ONT) should take around 6 hours and 28 minutes. That means you’ve got time to enjoy some refreshments, get some rest and work on your travel schedule before you land.
How many direct and indirect flights does United Airlines fly from ORD to ONT?
You can select from approximately 4 United Airlines flights every day from ORD to ONT.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to ONT, please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Chicago ORD to Ontario ONT 

To find the best deals on flights to Chicago from Ontario with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Chicago ORD to Ontario ONT with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $227 to $241, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from Chicago ORD to Ontario ONT 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Chicago to Ontario costs from $114. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to Ontario ONT from  Chicago ORD with United 

To find a cheap United flight from Chicago ORD to Ontario ONT, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from Chicago ORD to Ontario ONT 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as August, or if you book a flight with a stopover. 

 

Find nonstop flights from Chicago ORD to Ontario ONT with United 

If you’re keen to be on Ontario soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Chicago ORD to Ontario ONT 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to Ontario ONT from  Chicago ORD with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to Ontario

Ontario Airport Inn
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2.5 out of 5
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This hotel doesn't skimp on freebies - guests receive free buffet breakfast, free self parking, and a free airport shuttle. Traveling on business? Take advantage ...
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Motel 6 Ontario, CA - Convention Center - Airport
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2 out of 5
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An outdoor pool, free self parking, and laundry facilities are featured at this motel. A snack bar/deli is provided and the front desk is staffed ...
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Reviewed on Apr 25, 2025

Motel 6 Ontario, CA - Convention Center - Airport
Ontario Airport Hotel & Conference Center
Ontario Airport Hotel & Conference Center
3.5 out of 5
700 N Haven Ave, Ontario, CA
This hotel features an outdoor pool, a 24-hour gym, and a restaurant. Traveling on business? Take advantage of the 24-hour business center and free WiFi in public ...
8.6/10 Excellent! (2,772 reviews)
"Pet friendly, price for room wasn’t outrageously expensive. I would definitely stay here again."

Reviewed on Apr 25, 2025

Ontario Airport Hotel & Conference Center
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.