$99 United Cheap Flights from Denver to Ontario

Find The Best Day To Fly from Denver to Ontario

Amazing United DEN to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $188 round trip and $99 one way. Prices and availability subject to change. Additional terms may apply.

ONT From DEN Economy Coach Packages on Similar Airlines

Residence Inn Ontario Airport
Best Western Plus Ontario Airport & Convention Center
Comfort Suites Redlands
Don't see what you're looking for?
See all available trips from Denver Intl. to Los Angeles - Ontario Intl.
View all trips

Frequently asked questions

Can I catch a flight from Denver Airport to ONT right now?
Ensure you check out our Covid-19 Travel Advisor to learn if there are any present quarantine requirements or travel advice reports in place in Los Angeles - Ontario Intl. Airport (ONT) when jet-setting from Denver Airport.
What terminal is United Airlines at Denver Airport?
If you’re flying with United Airlines from Denver Airport, you’ll generally board from the main terminal. If you’re heading to Los Angeles - Ontario Intl. Airport (ONT) from here, you’ll probably be disembarking at terminal 2.
Are there United Airlines non-stop flights from DEN to ONT?
If you’re going from DIA airport to ONT and want a direct flight, United Airlines has got you covered. Choose your favorite seat now and you’ll be touching down at your destination in next to no time.
How long is a United Airlines flight from DEN to ONT?
Just 3 hours and 23 minutes is approximately how long you can anticipate being in the air for if you’re traveling with United Airlines from DEN to Los Angeles - Ontario Intl. Airport (ONT). That’ll give you just enough time to read some of your book or enjoy a bit of shut-eye.
What type of aircraft does United Airlines fly from DEN to ONT?
Booked a flight with United Airlines between DEN and ONT? The Airbus A319 and the Boeing 737-900 are the two airplane models that commonly operate on this flight path.
How many direct and indirect flights does United Airlines fly from DEN to ONT?
You’ll have a lot of flexibility if you fly with United Airlines from DEN to ONT. Currently, it has approximately 3 flights daily.
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.
CarrierFlightDepart DENArrive ONTSat
6/3
Sun
6/4
Mon
6/5
Tue
6/6
Wed
6/7
Thu
6/8
Fri
6/9
Stops
UA43011:15 am00:34 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
UA56404:18 pm00:06 amCheck Fare
-
Check FareCheck FareCheck FareCheck FareCheck Fare
2 Stops
UA133507:06 pm08:26 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops

Discover our best United flight from Denver DEN to Ontario ONT 

To find the best deals on flights to Denver from Ontario with United, just enter your travel dates, filter by United, and hit search. You’ll find 3 flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Denver DEN 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 $188 to $188, 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 Denver DEN 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 Denver to Ontario costs from $99. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to Ontario ONT from  Denver DEN with United 

To find a cheap United flight from Denver DEN 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 Denver DEN 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 June, or if you book a flight with a stopover. 

 

Find nonstop flights from Denver DEN 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 0 hour(s) 19 min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Denver DEN 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  Denver DEN 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

Comfort Inn & Suites near Ontario Airport
Comfort Inn & Suites near Ontario Airport
2.5 out of 5
3333 Shelby St, Ontario, CA, 91764
This hotel features an outdoor pool and a spa tub. Traveling on business? Take advantage of the business center and free WiFi in public areas. Guests will appreciate ...
7.6/10 Good! (707 reviews)
"The staff was very friendly and accommodating"

Reviewed on May 31, 2023

Comfort Inn & Suites near Ontario Airport
Ontario Airport Hotel & Conference Center
Ontario Airport Hotel & Conference Center
3.5 out of 5
700 N Haven Ave, Ontario, CA, 91764
This hotel features an outdoor pool, a 24-hour gym, and a restaurant. Traveling on business? Take advantage of the 16 conference rooms, as well as the 24-hour ...
8.2/10 Very Good! (1,503 reviews)
"It was a great stay, I enjoyed the hospitality."

Reviewed on May 26, 2023

Ontario Airport Hotel & Conference Center
SureStay Hotel by Best Western Ontario Airport
SureStay Hotel by Best Western Ontario Airport
2.5 out of 5
3201 East Centrelake Drive, Ontario, CA, 91761
An outdoor pool is featured at this hotel, along with free self parking. WiFi in public areas is free. A business center, a snack bar/deli, and express check-out ...
8.2/10 Very Good! (1,002 reviews)
"I stayed at the Ontario property and Darrell is an amazing customer service agent very knowledgeable and helpful and knows his rurou"

Reviewed on May 31, 2023

SureStay Hotel by Best Western Ontario Airport
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.