STL → DEN: cancellations & delays
Over Jan 2023 - Apr 2026, 1.0% of St. Louis Lambert International Airport (STL) to Denver International Airport (DEN) flights were cancelled and 22.5% arrived at least 15 minutes late, across 12,688 flights, flown by WN, UA, F9, OO. Cancellations peak in January.
Check today's live STL departures →Airport pages: St. Louis Lambert International Airport (STL) · Denver International Airport (DEN)
Rates are historical averages from U.S. DOT (BTS) on-time records; a specific flight's live estimate can differ with weather and the day's disruptions.