Beginning of main content
Round Trip Icon
Trip Type
Flight 1
Flight 2
Flight 3
Flight 4
Flight 5
Due to coronavirus (COVID-19) travel advisories, some destinations may be unavailable for certain dates. Find out more.

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Amazing STL to DEN Flight Deals

The cheapest flights to Denver Intl. found within the past 7 days were $97 round trip and $49 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for STL to DEN

Carrier Flight Depart STL Arrive DEN Thu
8/13
Fri
8/14
Sat
8/15
Sun
8/16
Mon
8/17
Tue
8/18
Wed
8/19
Stops
UA 5566 06:00 am 07:18 am Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 5412 08:10 am 09:29 am Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 5683 04:45 pm 06:23 pm Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
F9 279 06:27 pm 07:52 pm Check fare - Check fare - Check fare Check fare - 0 stop(s)
F9 281 07:32 pm 08:57 pm - Check fare - Check fare - - - 0 stop(s)
UA 5932 11:59 am 01:10 pm - - Check fare - - - - 0 stop(s)

FAQs about flights from Lambert-St. Louis Intl. Airport (STL) to Denver Intl. Airport (DEN)

Are there direct flights from St. Louis Lambert International Airport to Denver Airport?

Sometimes, a vacation is all about the journey; sometimes the magic is in the destination. If you're keen to get to where you're going fast, multiple airlines operate direct flights from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Denver, CO Airport (DEN-Denver Intl.), including Southwest Airlines and United Airlines.

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

If you're traveling from St. Louis to Denver, you can expect the flight to take approximately 3 hours and 13 minutes. If this is longer than you'd hoped, why not make the most of it? Read about where you're going, organize some last-minute details and get as much sleep as possible before the adventure starts.

What is the flight distance from St. Louis Lambert International Airport to Denver Airport?

There's a flight distance of 963 miles separating St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) and Denver, CO Airport (DEN-Denver Intl.). This is classified as a medium-haul flight. You'll have plenty of time to watch the in-flight entertainment and catch up on some shut-eye if you want to feel fresh on landing.

What airlines fly from St. Louis Lambert International Airport to Denver Airport?

If you're flying to Denver from St. Louis, you'll find a number of airlines offering direct flights. One of the most well-known is Southwest Airlines (WN), which has 161 flights on this route each month. You should also pore through the deals available through United Airlines (UA). Another leading carrier, it operates 146 flights each month on the St. Louis to Denver route. Be sure to compare the two airlines to find your ideal fare.

Flying Tips & Tricks How do I find my flight number?
  • Your flight number can be found in your travel itinerary. It's not hard to locate if you know exactly what you're looking for. Browse the document for a code made up of letters and numbers. The first one to two letters and single digit identify your airline (these are called IATA airline codes). This is followed by one, two, three or four digits — your flight number.
How early can you check bags for a flight?
  • Check-in and baggage drop times can differ between airlines. But if you're on an international flight, aim to get to the airport three hours before departure. Traveling domestically? Normally, you can hand your bags over one to two hours before takeoff. Don't be late — check-in typically closes an hour before departure for international flights and 45 minutes before for domestic ones.

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

Traveling FromLambert-St. Louis Intl.
Traveling ToDenver Intl.
Shortest Flight Time2 hours 15 mins
Earliest Departure Time6:00AM CDT
Latest Departure Time7:35PM CDT
Lowest Flight Price$97

St. Louis to Denver Carriers and Route Information

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.