$31 Cheap Flights from Ontario to Denver

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

Change your flight without a fee on select flights

Find The Best Dates To Fly from Los Angeles - Ontario Intl. to Denver Intl.

Amazing ONT to DEN Flight Deals

The cheapest flights to Denver Intl. found within the past 7 days were $72 round trip and $31 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for ONT to DEN

CarrierFlightDepart ONTArrive DENThu
1/20
Fri
1/21
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1/22
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1/23
Mon
1/24
Tue
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Wed
1/26
Stops
UA150301:25 pm04:40 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
F997406:24 pm09:42 pmCheck Fare
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0 Stops
F975210:06 am03:06 pm
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1 Stops

Best Denver Intl. Flight and Hotel Packages

Denver Intl. flight + hotel packages - economy flights

The Oxford Hotel
Eagle River Lodge
The Hotel Denver
Glenwood Springs Inn
Hotel Colorado
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FAQs about flights from Los Angeles - Ontario Intl. Airport (ONT) to Denver Intl. Airport (DEN)

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

It's always wise to know about any quarantine requirements and travel advice reports in effect in your destination city. Make sure you go to the Covid-19 Travel Advisor for up-to-date info on booking a flight to Denver, CO Airport (DEN-Denver Intl.).

Are there direct flights from Ontario Airport to DEN?

Your next great adventure is on the other side of a single flight. You can travel direct from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) to Denver, CO Airport (DEN-Denver Intl.) with multiple airlines, including United Airlines and Frontier Airlines.

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 DEN, please visit our Customer Service Portal.

How long is the flight from Los Angeles - Ontario Intl. Airport (ONT) to Denver Intl. Airport (DEN)?

On average, traveling from Ontario Airport to Denver, CO Airport (DEN-Denver Intl.) takes a mere 2 hours and 15 minutes in total. Use the short flight to rest your eyelids for a while or listen to a podcast before the next leg of your journey begins.

What is the flight distance from Ontario Airport to Denver, CO Airport (DEN-Denver Intl.)?

From ONT, you'll travel 808 mi before touching down at Denver Intl. Airport (DEN). That should be enough time to read a couple of chapters of your book or maybe even squeeze in a quick power nap.

What airlines fly from Los Angeles - Ontario Intl. Airport (ONT) to DEN?

If you're planning a trip to Denver from Los Angeles, you'll find several airlines offering direct flights. One of the most well-known is United Airlines (UA), which has 54 flights on this route every month. Another option is Frontier Airlines (F9), which offers 30 flights every month. The more airlines you take into account, the more likely you are to walk away with a terrific deal.

What airlines have practices regarding COVID-19 in place and use social distancing?

From the moment you enter the departure terminal to when you leave the arrivals terminal, if you're flying with United Airlines, Southwest Airlines or Frontier Airlines you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.

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.

 

Traveling From Los Angeles - Ontario Intl.
Traveling To Denver Intl.
Shortest Flight Time 2 hours 10 mins
Earliest Departure Time 6:30AM PST
Latest Departure Time 6:50PM PST
Lowest Flight Price $72

Route Info

Flight path for flights from LA/Ontario International Airport to Denver International Airport

Distance:
931.00 miles

Airlines & Aircraft Used on ONT to DEN Flight Routes

Airline Carrier
Aircraft
American Airlines
Airbus A320-100/200

Discover our best flights from Ontario ONT to Denver DEN. 

With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

 

Find our best return flights from Ontario ONT to Denver DEN at the right price  

Airfares to Denver DEN from Ontario ONT currently cost between $72 and $98. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way flights from Ontario ONT to Denver DEN 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Ontario ONT to Denver DEN on Travelocity starting at $31. Prices and availability subject to change. Additional terms may apply. 

 

Get to Denver DEN from Ontario ONT quicker with direct flights. 

Get to Denver faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to DEN from ONT to take around 2 hour(s) 10 min(s).  

 

Find our cheapest airfares for flights from Ontario ONT to Denver DEN

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to DEN from ONT. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

 

Get our best airfare deals for your flight from Ontario ONT to Denver DEN today 

If you’re flexible about when you travel, May is usually the cheapest month to fly from Ontario ONT to Denver DEN. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

 

Book flexible airline tickets for flights to Denver DEN from Ontario ONT 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to DEN from ONT have this option.  

 

Travel with confidence when you book flights to Denver DEN from Ontario ONT with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving. 

*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.