Important: This destination may have COVID-19 travel restrictions in place, including specific restrictions for lodging. Check any national, local, and health advisories for this destination before you book.

United Flights from Denver (DEN) to Ontario (ONT) from $59

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

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 $96 round trip and $59 one way. Prices and availability subject to change. Additional terms may apply.

FAQs about United Airlines Flights from DEN to ONT

Can I catch a flight from Denver, CO (DEN-Denver Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) right now?

It's wise to find out about any travel advice reports and quarantine requirements in effect in your destination city. Make sure you visit the Covid-19 Travel Advisor for up-to-date information on booking a flight to Ontario, CA (ONT-Los Angeles - Ontario Intl.) from Denver, CO (DEN-Denver Intl.).

What terminal is United Airlines at Denver Airport?

Before you jet off from Denver, CO (DEN-Denver Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) with United Airlines, it might be a good idea to get in touch with the airline for your terminal information. While your ticket should display some of the details, we can't guarantee it.

Are there United Airlines non-stop flights from DEN to ONT?

Unfortunately, there aren't any direct flights between Denver Intl. Airport (DEN) and Ontario, CA (ONT-Los Angeles - Ontario Intl.) with United Airlines. Plan to make at least one stopover if you have to stick to this particular airline and route.

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 Los Angeles - Ontario Intl. Airport (ONT), please visit our Customer Service Portal.

Which airlines offer COVID-19 measures and exercise social distancing rules?

Southwest Airlines, American Airlines and Delta are just some of the many carriers that employ COVID-19 measures and use social distancing rules on their flights. Some of their strategies are cleaning with disinfectant and providing passenger masks.

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 2020. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Sunday, as data shows the end of the week 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 2020, 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 2020 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2 weeks to 2 months prior to their travel dates.

How can I save money on airline tickets?

We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2020 saved nearly 40% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2020. Savings are subject to change based on departure location, date and destination.

CarrierFlightDepart DENArrive ONTSat
7/31
Sun
8/1
Mon
8/2
Tue
8/3
Wed
8/4
Thu
8/5
Fri
8/6
Stops
UA64911:43 am00:54 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
UA168907:30 pm08:45 pm
-
Check FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
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

Azure Hotel & Suites, Trademark Collection by Wyndham
Azure Hotel & Suites, Trademark Collection by Wyndham
3 out of 5
1945 E. Holt Blvd, Ontario, CA
The price is $103 per night from Aug 8 to Aug 8
This hotel features a restaurant, a fitness center, and a bar/lounge. Traveling on business? Take advantage of the 6 conference rooms, as well as the 24-hour ...
4.4/5Excellent! (51 reviews)
"Property is ver clean and quiet."

Reviewed on Jul 27, 2021

Azure Hotel & Suites, Trademark Collection by Wyndham
Ontario Airport Hotel & Conference Center
Ontario Airport Hotel & Conference Center
3.5 out of 5
700 N Haven Ave, Ontario, CA
The price is $110 per night from Aug 8 to Aug 8
This hotel features an outdoor pool, a 24-hour fitness center, and a restaurant. Traveling on business? Take advantage of the 16 conference rooms, as well as ...
3.8/5Good! (17 reviews)
"Nice stay"

Reviewed on Jun 16, 2021

Ontario Airport Hotel & Conference Center
DoubleTree by Hilton Ontario Airport
DoubleTree by Hilton Ontario Airport
4 out of 5
222 N Vineyard Ave, Ontario, CA
The price is $144 per night from Aug 8 to Aug 8
This smoke-free hotel features a nightclub and 2 restaurants. Traveling on business? Take advantage of the 13 conference rooms, 24-hour business center, and ...
3.4/5 (20 reviews)
"Clean and easy check in"

Reviewed on May 23, 2021

DoubleTree by Hilton 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.