Cheap flights from St. Louis to Denver (STL - DEN) from $29

Tuesday flights are generally found to be more expensive for flights from St. Louis to Denver. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Denver.

Find a great deal and save up to 10% by booking at least 15 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Denver within the next two weeks, with the cheapest ticket starting at $185.

February can be a great time to fly to Denver from St. Louis with a flight ticket averaging about $194. Cheapflights users have found deals in the month of February for as cheap as $67. The most expensive prices can be found in the month of June.

It’s optimal to fly from St. Louis to Denver in the afternoon. By choosing this option you can save up to 42% on the cost of your flight, compared to a flight at noon.

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 4 different airlines have flights from Lambert-St Louis (STL) to Denver Intl (DEN) on a regular basis. There are 18 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 23m.

Yes, there are multiple flights from St. Louis to Denver for under $100. The cheapest flight booked recently is on Frontier for just $38, but on average you can expect to pay $68.

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 $74.

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

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

Flights from Lambert-St Louis to Denver Intl have been viewed 56 times in the past calendar month.

23 flight departures from St. Louis to Denver per day on average.
Early Morning (Midnight to 6am) - 17% of flight departures
Morning (6am - Noon) - 30% of flight departures
Afternoon (Noon - 6pm) - 39% of flight departures
Evening (6pm - Midnight) - 13% of flight departures

Departing from St. Louis to Denver will take you 2h 29m. Airlines will cover a distance of 772 mi. Generally, flights for this route are nonstop.

Frontier, at $38, was found to be the cheapest airline from St. Louis to Denver.. Users have found that Frontier is 80% cheaper than the other options available to this destination.

One-way options have recently been found by users for as low as $29 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $91 and Delta from $109 one-way.

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

No one likes to see their flight delayed. When booking a flight from St. Louis to Denver consider choosing Air Canada (80%), United Airlines (78%) or Frontier (67%) as they are the most reliable in getting you off to your destination on time.

Looking for the cheapest flight from St. Louis to Denver? While on average our users pay $637, our data indicates the cheapest price to be $41. The most popular route (Lambert-St Louis - Denver Intl), is priced around $68.

Great question - STL to DEN just means Lambert-St Louis Airport to Denver Intl Airport. Now you’ll know what these unique codes when you look for flights!

Deals for St. Louis to Denver flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from St. Louis to Denver.

Users can book flights with no change fees policies with our dedicated filters. Book flights from St. Louis to Denver flexibly with Cheapflights today.

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