Flight OddsUA4038 STL → IAH
United Airlines · St. Louis, MO to Houston, TX · 8 flights observed, 2025-10-29 to 2025-11-29 · 667 mi
UA4038 covers more than one route in the data window — the stats below are for STL → IAH, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
-23 min
90th percentile
+37 min
Cancellation rate
0%
How often is UA4038 on time?
Across 8 flights on STL → IAH from 2025-10-29 to 2025-11-29, UA4038 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -23 min, and the worst 10% of flights arrived +37 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 7 | 88% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 13% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 1 | 100% | -24 min |
| 2025-11 | 7 | 86% | +0 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | No data | — |
| Wed | 4 | 100% |
| Thu | No data | — |
| Fri | No data | — |
| Sat | 4 | 75% |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…