Flight OddsUA4256 IAH → BHM
United Airlines · Houston, TX to Birmingham, AL · 166 flights observed, 2025-07-02 to 2026-06-29 · 562 mi
UA4256 covers more than one route in the data window — the stats below are for IAH → BHM, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
78%
Median delay
-9 min
90th percentile
+80 min
Cancellation rate
2%
How often is UA4256 on time?
Across 166 flights on IAH → BHM from 2025-07-02 to 2026-06-29, UA4256 arrived within 15 minutes of schedule 78% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +80 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 | 127 | 78% |
| 16-30 min | 11 | 7% |
| 31-60 min | 4 | 2% |
| 61-120 min | 11 | 7% |
| 2+ hrs | 9 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 24 | 58% | +25 min |
| 2025-08 | 27 | 85% | +1 min |
| 2025-09 | 21 | 81% | +0 min |
| 2025-12 | 14 | 86% | +8 min |
| 2026-01 | 6 | 83% | +7 min |
| 2026-02 | 15 | 87% | -5 min |
| 2026-03 | 26 | 85% | +1 min |
| 2026-04 | 7 | 86% | -6 min |
| 2026-05 | 6 | 50% | +35 min |
| 2026-06 | 16 | 75% | +13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 27 | 78% |
| Tue | 10 | 90% |
| Wed | 23 | 83% |
| Thu | 29 | 83% |
| Fri | 28 | 54% |
| Sat | 18 | 83% |
| Sun | 27 | 89% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…