Flight OddsUA234 IAH → SFO
United Airlines · Houston, TX to San Francisco, CA · 84 flights observed, 2025-09-25 to 2025-12-17 · 1,635 mi
UA234 covers more than one route in the data window — the stats below are for IAH → SFO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
86%
Median delay
-9 min
90th percentile
+26 min
Cancellation rate
1%
How often is UA234 on time?
Across 84 flights on IAH → SFO from 2025-09-25 to 2025-12-17, UA234 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +26 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 | 71 | 86% |
| 16-30 min | 4 | 5% |
| 31-60 min | 5 | 6% |
| 61-120 min | 2 | 2% |
| 2+ hrs | 1 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-09 | 6 | 100% | -6 min |
| 2025-10 | 30 | 80% | +2 min |
| 2025-11 | 30 | 80% | +8 min |
| 2025-12 | 17 | 100% | -15 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 12 | 100% |
| Tue | 12 | 92% |
| Wed | 12 | 75% |
| Thu | 12 | 83% |
| Fri | 12 | 92% |
| Sat | 12 | 75% |
| Sun | 11 | 82% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…