STL → SLC: cancellations & delays
Over Jan 2023 - Apr 2026, 0.6% of St. Louis Lambert International Airport (STL) to Salt Lake City International Airport (SLC) flights were cancelled and 11.3% arrived at least 15 minutes late, across 3,244 flights, flown by DL, WN, OO. Cancellations peak in January.
Check today's live STL departures →Airport pages: St. Louis Lambert International Airport (STL) · Salt Lake City International Airport (SLC)
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.