Flight OddsIAH → STL United Airlines
United Airlines · Houston, TX to St. Louis, MO · 1,231 flights, 2025-07-01 to 2026-06-30 · aggregated across 48 flight numbers
On-time arrival
82%
Median delay
-7 min
90th percentile
+36 min
Cancellation rate
1%
How on-time is United Airlines from IAH to STL?
Across every United Airlines flight number on IAH → STL (1,231 flights, 2025-07-01 to 2026-06-30), 82% arrived within 15 minutes of schedule. Median arrival delay -7 min; the worst 10% ran +36 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 1,002 | 82% |
| 16-30 min | 72 | 6% |
| 31-60 min | 80 | 7% |
| 61-120 min | 42 | 3% |
| 2+ hrs | 20 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 105 | 78% | +11 min |
| 2025-08 | 110 | 75% | +8 min |
| 2025-09 | 113 | 89% | -6 min |
| 2025-10 | 110 | 83% | +2 min |
| 2025-11 | 111 | 80% | +3 min |
| 2025-12 | 90 | 84% | 0 min |
| 2026-01 | 84 | 87% | -3 min |
| 2026-02 | 82 | 90% | -5 min |
| 2026-03 | 91 | 77% | +14 min |
| 2026-04 | 89 | 88% | -4 min |
| 2026-05 | 104 | 85% | +1 min |
| 2026-06 | 127 | 77% | +7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 175 | 82% |
| Tue | 170 | 83% |
| Wed | 177 | 88% |
| Thu | 189 | 80% |
| Fri | 187 | 82% |
| Sat | 134 | 84% |
| Sun | 184 | 79% |
UA flight numbers on IAH → STL
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…