Flight OddsUA1277 STL → IAH
United Airlines · St. Louis, MO to Houston, TX · 44 flights observed, 2025-08-19 to 2025-10-25 · 667 mi
UA1277 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
-16 min
90th percentile
+18 min
Cancellation rate
2%
How often is UA1277 on time?
Across 44 flights on STL → IAH from 2025-08-19 to 2025-10-25, UA1277 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -16 min, and the worst 10% of flights arrived +18 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 38 | 88% |
| 16-30 min | 2 | 5% |
| 31-60 min | 2 | 5% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 8 | 63% | +4 min |
| 2025-09 | 20 | 95% | -8 min |
| 2025-10 | 15 | 93% | -13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 9 | 100% |
| Tue | 5 | 80% |
| Wed | No data | — |
| Thu | 4 | 75% |
| Fri | 10 | 80% |
| Sat | 10 | 90% |
| Sun | 5 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…