Cheap flights from St. Louis to Denver (STL - DEN)

Flight FAQs

From St. Louis to Denver

What airports do I use to fly from St. Louis to Denver?

You will need to book a flight from Lambert-St Louis to Denver Intl if you want to fly from St. Louis to Denver. At least 6 different airlines have flights from Lambert-St Louis (STL) to Denver Intl (DEN) on a regular basis. There are 14 flights to Denver from the St. Louis airport per day. If you manage to book one that is nonstop, then you can expect the flight time from STL to DEN to be around 2h 20m.

Which airlines flying from Lambert-St Louis to Denver Intl have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Lambert-St Louis to Denver Intl that may be offering flexible cancellation policies are Frontier, United Airlines, and American Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from St. Louis to Denver for under $100 on Cheapflights?

Yes, there are multiple flights from St. Louis to Denver for under $100. The cheapest flight booked recently is on Frontier for just $61, but on average you can expect to pay $82.

Are there nonstop flights from St. Louis to Denver for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from St. Louis to Denver under $100. A good price for a nonstop flight from St. Louis to Denver is less than $85.

Are there last-minute flights available from St. Louis to Denver for under $100?

There are currently 20+ open flights from St. Louis to Denver within the next 7 days for less than $100.

What days are nonstop flights available from St. Louis to Denver?

Days when nonstop flights are available for this flight are: Thursday, Friday, Saturday.

How popular is this St. Louis to Denver flight route?

Flights from Lambert-St Louis to Denver Intl have been viewed 358 times in the past calendar month.

How many flights depart from St. Louis to Denver on average per day?

14 flight departures from St. Louis to Denver per day on average.
Early Morning (Midnight to 6am) - 7% of flight departures
Morning (6am - Noon) - 57% of flight departures
Afternoon (Noon - 6pm) - 14% of flight departures
Evening (6pm - Midnight) - 21% of flight departures

How long is the flight from St. Louis to Denver?

Departing from St. Louis to Denver will take you 2h 30m. Airlines will cover a distance of 772 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from St. Louis to Denver round-trip?

Frontier, at $61, was found to be the cheapest airline from St. Louis to Denver. An alternate airline flying to your destination would be Spirit Airlines. Users have found that Frontier is 61% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from St. Louis to Denver one-way?

One-way options have recently been found by users for as low as $31 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $50 and United Airlines from $59 one-way.

What are the most reliable airlines from St. Louis to Denver?

No one likes to see their flight delayed. When booking a flight from St. Louis to Denver consider choosing Frontier (86%), SkyWest Airlines (86%) or Air Canada (85%) as they are the most reliable in getting you off to your destination on time.

What are the cheapest flights from St. Louis to Denver?

Looking for the cheapest flight from St. Louis to Denver? While on average our users pay $412, our data indicates the cheapest price to be $38. The most popular route (Lambert-St Louis - Denver Intl), is priced around $68.

What are the most popular airlines that fly from St. Louis to Denver?

When booking a flight from St. Louis to Denver, you may want to consider flying on Major Airline, American Airlines or Delta as they are the most popular for this route.