Flight OddsUA515 SAT → IAH
United Airlines · San Antonio, TX to Houston, TX · 133 flights observed, 2025-12-18 to 2026-05-20 · 191 mi
UA515 covers more than one route in the data window — the stats below are for SAT → IAH, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
83%
Median delay
-4 min
90th percentile
+25 min
Cancellation rate
1%
How often is UA515 on time?
Across 133 flights on SAT → IAH from 2025-12-18 to 2026-05-20, UA515 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -4 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 | 109 | 83% |
| 16-30 min | 12 | 9% |
| 31-60 min | 5 | 4% |
| 61-120 min | 4 | 3% |
| 2+ hrs | 2 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 14 | 93% | -1 min |
| 2026-01 | 31 | 90% | -3 min |
| 2026-02 | 11 | 100% | -8 min |
| 2026-03 | 26 | 65% | +21 min |
| 2026-04 | 30 | 77% | +10 min |
| 2026-05 | 20 | 85% | +2 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 18 | 94% |
| Tue | 19 | 89% |
| Wed | 19 | 89% |
| Thu | 19 | 79% |
| Fri | 19 | 84% |
| Sat | 19 | 68% |
| Sun | 19 | 74% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…