About 1 in 8 UA 5491 flights from San Francisco arrived 15+ minutes late, diverted or cancelled over the past year (12%); 0.0% were cancelled. The typical flight landed 6 minutes early.
UA 5491: SFO → PSC
Scheduled to leave San Francisco at 9:30 a.m. local time, operated by SkyWest as OO 5491. Over the past year it arrived on time 88% of the time (253 flights), worse than other UA flights on the route at that hour (92%). Last seen in the data Jun 24, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 38 | 92% |
| Tuesday | 38 | 92% |
| Wednesday | 32 | 81% |
| Thursday | 32 | 88% |
| Friday | 38 | 82% |
| Saturday | 38 | 92% |
| Sunday | 37 | 86% |
Why it was late
All flights SFO → PSC · Connecting off UA 5491? Check the risk
Questions
How often is UA 5491 from SFO to PSC late?
United Airlines 5491 from San Francisco, CA to Pasco/Kennewick/Richland, WA arrived 15 or more minutes late, was diverted or was cancelled on 12% of 253 scheduled flights between September 2025 and August 2026. 0.0% 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.