About 1 in 3 UA 5480 flights from San Francisco arrived 15+ minutes late, diverted or cancelled over the past year (32%); 3.7% were cancelled. The typical flight landed 5 minutes early.
UA 5480: SFO → ACV
Scheduled to leave San Francisco at 4:31 p.m. local time, operated by SkyWest as OO 5480. Over the past year it arrived on time 68% of the time (269 flights), in line with other UA flights on the route at that hour (68%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 42 | 60% |
| Tuesday | 37 | 78% |
| Wednesday | 39 | 67% |
| Thursday | 39 | 56% |
| Friday | 40 | 68% |
| Saturday | 31 | 87% |
| Sunday | 41 | 63% |
Why it was late
All flights SFO → ACV · Connecting off UA 5480? Check the risk
Questions
How often is UA 5480 from SFO to ACV late?
United Airlines 5480 from San Francisco, CA to Arcata/Eureka, CA arrived 15 or more minutes late, was diverted or was cancelled on 32% of 269 scheduled flights between September 2025 and August 2026. 3.7% 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.