IAH → STL: cancellations & delays
Over Jan 2023 - Apr 2026, 1.2% of George Bush Intercontinental Airport (IAH) to St. Louis Lambert International Airport (STL) flights were cancelled and 27.8% arrived at least 15 minutes late, across 1,994 flights, flown by UA, OO. Cancellations peak in January.
Check today's live IAH departures →Airport pages: George Bush Intercontinental Airport (IAH) · St. Louis Lambert International Airport (STL)
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.