Important: This destination may have COVID-19 travel restrictions in place, including specific restrictions for lodging. Check any national, local, and health advisories for this destination before you book.

Flights from Lambert-St. Louis Intl. (STL) to Denver Intl. (DEN) starting at $44

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Find The Best Dates To Fly from Lambert-St. Louis Intl. to Denver Intl.

Amazing STL to DEN Flight Deals

The cheapest flights to Denver Intl. found within the past 7 days were $89 round trip and $44 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for STL to DEN

CarrierFlightDepart STLArrive DENSat
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UA535608:35 am10:00 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
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F927909:39 am11:07 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
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UA551911:00 am00:17 pmCheck Fare
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UA534701:41 pm02:58 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
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UA522105:15 pm06:41 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
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UA551011:00 am00:17 pm
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Best Denver Intl. Flight and Hotel Packages

Denver Intl. flight + hotel packages - economy flights

Cliff House at Pikes Peak
The Curtis Denver - a DoubleTree by Hilton Hotel
Embassy Suites Colorado Springs
DoubleTree by Hilton Denver Cherry Creek
The Ramble Hotel
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FAQs about flights from Lambert-St. Louis Intl. Airport (STL) to Denver Intl. Airport (DEN)

Can I catch a flight from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Denver, CO Airport (DEN-Denver Intl.) right now?

It's prudent to find out about any travel advice reports and quarantine requirements in place in your destination. Make sure you visit the Covid-19 Travel Advisor for up-to-date info on booking a flight to Denver, CO Airport (DEN-Denver Intl.) from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.).

Are there direct flights from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Denver Airport?

Multiple airlines operate nonstop flights from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Denver Airport. Among these are United Airlines and Frontier Airlines — check them out if you'd prefer to land at Denver sooner rather than later.

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

How long is the flight from St. Louis Lambert International Airport to DEN?

Flying from Lambert-St. Louis Intl. Airport (STL) to DIA airport is no sweat as the flight generally lasts about 2 hours and 19 minutes. With so little time spent in the air, it's highly likely that you'll disembark the plane feeling as sprightly as when you boarded.

What is the flight distance from Lambert-St. Louis Intl. Airport (STL) to DEN?

With just 777 mi separating STL and DEN, time will whiz by between the seat belt sign turning off and the captain readying the wheels for landing.

What airlines fly from Lambert Field to Denver Airport?

If you're heading to Denver from St. Louis, there are a few airlines that have direct flights. One of the most popular is United Airlines (UA), which has 130 flights on this route every month. Another good option is Frontier Airlines (F9), which offers 32 flights every month. The more airlines you take into account, the more likely you are to pick up an amazing deal.

What airlines have practices regarding COVID-19 in place and use social distancing?

From the moment you enter the departure terminal to when you leave the arrivals terminal, if you're flying with United Airlines, Southwest Airlines or Frontier Airlines you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.

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 2020. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Sunday, as data shows the end 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 2020, 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 2020 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2 weeks to 2 months 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 2020 saved nearly 40% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2020. Savings are subject to change based on departure location, date and destination.

Lambert-St. Louis Intl. to Denver Intl. Flight FAQ

Traveling From Lambert-St. Louis Intl.
Traveling To Denver Intl.
Shortest Flight Time 2 hours 15 mins
Earliest Departure Time 5:20AM CDT
Latest Departure Time 9:15PM CDT
Lowest Flight Price $89

Route Info

Flight path for flights from Lambert-St. Louis International Airport to Denver International Airport

Distance:
772.00 miles

Airlines & Aircraft Used on STL to DEN Flight Routes

Airline Carrier
Aircraft
American Airlines
Airbus A340-300
American Airlines
Boeing 737-800 pax
United Airlines
Boeing 737-300 pax
United Airlines
Boeing 737-800 (winglets) pax
United Airlines
Boeing 777-200 pax
*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.