UA4655 ACV → SFO

United Airlines · Arcata/Eureka, CA to San Francisco, CA · 362 flights observed, 2025-07-01 to 2026-06-30 · 250 mi

This flight has been getting less reliable recently — 2026-06's on-time rate (27%) is well below the 65% average from earlier months.

UA4655 covers more than one route in the data window — the stats below are for ACV → SFO, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
62%
Median delay
+5 min
90th percentile
+90 min
Cancellation rate
1%

How often is UA4655 on time?

Across 362 flights on ACV → SFO from 2025-07-01 to 2026-06-30, UA4655 arrived within 15 minutes of schedule 62% of the time. The median arrival delay was +5 min, and the worst 10% of flights arrived +90 min or later. 1% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time22162%
16-30 min3811%
31-60 min3811%
61-120 min3510%
2+ hrs257%

Performance by month

MonthFlightsOn-timeAvg delay
2025-073184%+9 min
2025-082993%+3 min
2025-093073%+20 min
2025-103171%+9 min
2025-113070%+15 min
2025-122962%+24 min
2026-013184%+3 min
2026-022850%+49 min
2026-033060%+29 min
2026-043030%+57 min
2026-052836%+38 min
2026-063027%+44 min

Performance by day of week

DayFlightsOn-time
Mon5157%
Tue4965%
Wed5058%
Thu5260%
Fri5263%
Sat5267%
Sun5163%

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