UA334 IAH → SFO

United Airlines · Houston, TX to San Francisco, CA · 97 flights observed, 2025-09-25 to 2026-01-05 · 1,635 mi

This flight has been getting less reliable recently — 2026-01's on-time rate (20%) is well below the 83% average from earlier months.

UA334 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
80%
Median delay
-14 min
90th percentile
+74 min
Cancellation rate
0%

How often is UA334 on time?

Across 97 flights on IAH → SFO from 2025-09-25 to 2026-01-05, UA334 arrived within 15 minutes of schedule 80% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +74 min or later. 0% of flights were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time7880%
16-30 min33%
31-60 min55%
61-120 min66%
2+ hrs55%

Performance by month

MonthFlightsOn-timeAvg delay
2025-09580%-5 min
2025-102785%+2 min
2025-112986%-7 min
2025-123181%+2 min
2026-01520%+140 min

Performance by day of week

DayFlightsOn-time
Mon1587%
Tue1493%
Wed1479%
Thu1464%
Fri1080%
Sat1580%
Sun1580%

Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…