Flight OddsUA4821 IAH → AMA
United Airlines · Houston, TX to Amarillo, TX · 292 flights observed, 2025-07-01 to 2026-06-30 · 518 mi
UA4821 covers more than one route in the data window — the stats below are for IAH → AMA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
-17 min
90th percentile
+25 min
Cancellation rate
1%
How often is UA4821 on time?
Across 292 flights on IAH → AMA from 2025-07-01 to 2026-06-30, UA4821 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -17 min, and the worst 10% of flights arrived +25 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 255 | 88% |
| 16-30 min | 7 | 2% |
| 31-60 min | 14 | 5% |
| 61-120 min | 6 | 2% |
| 2+ hrs | 8 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 27 | 81% | +15 min |
| 2025-08 | 28 | 93% | -11 min |
| 2025-09 | 29 | 90% | -10 min |
| 2025-10 | 23 | 100% | -17 min |
| 2025-11 | 30 | 87% | +1 min |
| 2025-12 | 17 | 71% | +19 min |
| 2026-01 | 16 | 100% | -14 min |
| 2026-02 | 25 | 100% | -19 min |
| 2026-03 | 29 | 79% | -12 min |
| 2026-04 | 17 | 94% | -10 min |
| 2026-05 | 27 | 81% | -2 min |
| 2026-06 | 22 | 82% | +17 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 48 | 90% |
| Tue | 40 | 93% |
| Wed | 41 | 85% |
| Thu | 49 | 86% |
| Fri | 49 | 92% |
| Sat | 22 | 73% |
| Sun | 41 | 90% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…