Cheap Frontier Airlines flights from Denver to Ontario (DEN to ONT)

Find The Best Day To Fly from Denver to Ontario

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.
*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.