STL → PHL: cancellations & delays
Over Jan 2023 - Apr 2026, 1.6% of St. Louis Lambert International Airport (STL) to Philadelphia International Airport (PHL) flights were cancelled and 18.9% arrived at least 15 minutes late, across 4,770 flights, flown by WN, AA, OH, YX, F9. Cancellations peak in January.
Check today's live STL departures →Airport pages: St. Louis Lambert International Airport (STL) · Philadelphia International Airport (PHL)
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.