Vuelos de Frontier Airlines de St. Louis (STL) a Denver (DEN) desde $44

Be sure to visit our Covid-19 Travel Advisor to discover if there are any current travel advice reports and quarantine requirements in place in Denver Airport when flying from Lambert-St. Louis Intl. Airport (STL).

At Lambert-St. Louis Intl. Airport (STL), Frontier Airlines flights to DIA airport typically leave from terminal 1. Unsure as to exactly which terminal you’ll be disembarking at? It’ll likely be the main terminal.

There certainly are. Save yourself time and effort and fly straight from St. Louis Lambert International Airport to DIA airport with Frontier Airlines. Avoid long stopovers, reduce the risk of losing your bags and get to your destination faster — direct flights are the preferred way to travel for many savvy wanderers.

Your Frontier Airlines flight from STL to DEN should take roughly 4 hours and 10 minutes. There are many things you can do to pass the time. Asking the person next to you about their awesome travel experiences is one of them. If you’d rather a different type of in-flight entertainment, you could always watch a TV show.

The Airbus A321 and the Airbus A320neo are the aircraft models routinely operated by Frontier Airlines between STL and DEN.

In each week, you’ll find about 9 Frontier Airlines flights servicing the route between St. Louis Lambert International Airport and Denver Airport.

For more info about changing your flight to Denver Intl. Airport (DEN), please visit our Customer Service Portal.

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.

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.

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.