$34 Frontier Airlines Cheap Flights from Denver to Ontario

Find The Best Day To Fly from Denver to Ontario

Amazing Frontier Airlines DEN to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $67 round trip and $34 one way. Prices and availability subject to change. Additional terms may apply.

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Frequently asked questions

Can I catch a flight from DEN to Los Angeles - Ontario Intl. Airport (ONT) right now?
Ensure you check out our Covid-19 Travel Advisor to learn if there are any current travel advice reports or quarantine requirements in effect in ONT when flying from DIA airport.
What terminal is Frontier Airlines at Denver Airport?
If you’re flying from Denver Airport to ONT with Frontier Airlines, you’re likely to be departing from the main terminal. Your airline should be able to let you know which terminal you’ll be hopping off the plane at.
Are there Frontier Airlines non-stop flights from DEN to ONT?
You can fly direct from DEN to Los Angeles - Ontario Intl. Airport (ONT) with Frontier Airlines and avoid the hassles of layovers. The less time you spend stuck in a plane, the more time you’ll have for adventuring.
How long is a Frontier Airlines flight from DEN to ONT?
From the minute your Frontier Airlines plane pushes back from the gate at DIA airport to the instant it taxis into Los Angeles - Ontario Intl. Airport (ONT), your trip will take an average of 2 hours and 52 minutes. With such a brief flight time, it’s a fantastic spur-of-the-moment escape.
What type of aircraft does Frontier Airlines fly from DEN to ONT?
The Airbus A320neo and the Airbus A321 are the two types of aircraft normally used by Frontier Airlines between DEN and Los Angeles - Ontario Intl. Airport (ONT).
How many direct and indirect flights does Frontier Airlines fly from DEN to ONT?
You can take your pick of roughly 2 flights every day with Frontier Airlines from DEN 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.
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Discover our best Frontier Airlines flight from Denver DEN to Ontario ONT 

To find the best deals on flights to Denver from Ontario with Frontier Airlines, just enter your travel dates, filter by Frontier Airlines, 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 Denver DEN to Ontario ONT with Frontier Airlines 

If you’re planning a round trip, booking return flights with Frontier Airlines is usually the most cost-effective option. With airfares ranging from $67 to $73, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way Frontier Airlines 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 Frontier Airlines flight from Denver to Ontario costs from $34. Prices and availability subject to change. Additional terms may apply. 

 

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

To find a cheap Frontier Airlines 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 Frontier Airlines 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 December, or if you book a flight with a stopover. 

 

Find nonstop flights from Denver DEN to Ontario ONT with Frontier Airlines 

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

 

Flexible airline tickets for Frontier Airlines 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 Frontier Airlines 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.

Frontier Airlines Airports
Hop on a(n) Frontier Airlines flight today by flying to many destinations out of these domestic and international airports:
Airport Code
Country
Airport Name
Number of Flights
DENUSADenver Intl.13
MCOUSAOrlando Intl.7
CUNMEXCancun Intl.6
GDLMEXDon Miguel Hidalgo y Costilla Intl.5
PHLUSAPhiladelphia Intl.2
ORDUSAO'Hare Intl.2
MIAUSAMiami Intl.1
LASUSAMcCarran Intl.1
MEXMEXMexico City Intl.1
LAXUSALos Angeles Intl.1

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