About 1 in 2 UA 4655 flights from Arcata arrived 15+ minutes late, diverted or cancelled over the past year (48%); 0.8% were cancelled. The typical flight landed 12 minutes late.
UA 4655: ACV → SFO
Scheduled to leave Arcata at 2:15 p.m. local time, operated by SkyWest as OO 4655. Over the past year it arrived on time 52% of the time (362 flights), in line with other UA flights on the route at that hour (52%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 47% |
| Tuesday | 49 | 51% |
| Wednesday | 52 | 50% |
| Thursday | 52 | 50% |
| Friday | 52 | 46% |
| Saturday | 52 | 62% |
| Sunday | 52 | 56% |
Why it was late
All flights ACV → SFO · Connecting off UA 4655? Check the risk
Questions
How often is UA 4655 from ACV to SFO late?
United Airlines 4655 from Arcata/Eureka, CA to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 48% of 362 scheduled flights between September 2025 and August 2026. 0.8% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check United Airlines for today's flight. Method.