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Amazing Frontier Airlines STL to DEN Flight Deals

The cheapest flights to Denver 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.

DEN From STL Economy Coach Packages on Similar Airlines

Carrier Flight Depart STL Arrive DEN Thu
F9 279 09:55 am 11:23 am Check fare - Check fare - - Check fare - 0 stop(s)
F9 281 10:45 am 12:13 pm - Check fare - Check fare Check fare - - 0 stop(s)

FAQs about Frontier Airlines Flights from STL to DEN

What terminal is Frontier Airlines at St. Louis Lambert International Airport?

If you're flying with Frontier Airlines from St. Louis, MO (STL-Lambert-St. Louis Intl.), you'll usually catch your flight from terminal 1. If you're traveling to Denver, CO (DEN-Denver Intl.) from here, you'll likely be pulling in at the main terminal.

Are there Frontier Airlines non-stop flights from STL to DEN?

With Frontier Airlines offering nonstop services from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Denver, CO (DEN-Denver Intl.), your next exciting adventure is a plane ride away. Wave goodbye to the stress and luggage hiccups that often come with stopovers, and secure your seat today.

How long is a Frontier Airlines flight from STL to DEN?

Watch a few TV episodes, listen to a podcast or just recline your seat and relax. Whatever interests you, you'll need to find a way to pass the 4 hours and 11 minutes that it takes to fly from STL to DEN with Frontier Airlines.

What type of aircraft does Frontier Airlines fly from STL to DEN?

If you're on your way from STL to DEN with Frontier Airlines, you'll probably be cruising the skies aboard the Airbus A320 or the Airbus A321.

How many direct and indirect flights does Frontier Airlines fly from STL to DEN?

You shouldn't have any problems finding a flight from STL to DEN. With roughly 20 Frontier Airlines flights operating on this route each month, there's bound to be one that's perfect for you.

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 Denver, CO (DEN-Denver Intl.), please visit our Customer Service Portal.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Tuesdays tend to be the cheapest, according to flight demand on Travelocity in 2019. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Monday, as data shows the start 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 2019, flights departing on a Tuesday 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 2019 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 1-2 weeks 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 2019 saved nearly 50% when their return flights consisted of two different airlines or fare types.

*According to flight demand on from January to December 2019. 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.