Flight OddsUA636 IAH → SAT
United Airlines · Houston, TX to San Antonio, TX · 43 flights observed, 2025-07-01 to 2025-08-18 · 191 mi
UA636 covers more than one route in the data window — the stats below are for IAH → SAT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
72%
Median delay
-1 min
90th percentile
+71 min
Cancellation rate
0%
How often is UA636 on time?
Across 43 flights on IAH → SAT from 2025-07-01 to 2025-08-18, UA636 arrived within 15 minutes of schedule 72% of the time. The median arrival delay was -1 min, and the worst 10% of flights arrived +71 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 | 31 | 72% |
| 16-30 min | 1 | 2% |
| 31-60 min | 5 | 12% |
| 61-120 min | 4 | 9% |
| 2+ hrs | 2 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 67% | +19 min |
| 2025-08 | 13 | 85% | +21 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 71% |
| Tue | 7 | 71% |
| Wed | 7 | 71% |
| Thu | 4 | 25% |
| Fri | 4 | 100% |
| Sat | 7 | 100% |
| Sun | 7 | 57% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…