About 1 in 4 UA 5688 flights from San Francisco arrived 15+ minutes late, diverted or cancelled over the past year (25%); 0.3% were cancelled. The typical flight landed 5 minutes early.
UA 5688: SFO → TUS
Scheduled to leave San Francisco at 8:57 p.m. local time, operated by SkyWest as OO 5688. Over the past year it arrived on time 75% of the time (296 flights), better than other UA flights on the route at that hour (66%). Last seen in the data Aug 10, 2026.
Usually United Airlines's last flight of the day from San Francisco to Tucson (100% of days). United Airlines's last SFO–TUS flight was cancelled 0.3% of the time, against 0.4% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 12:23 p.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 46 | 70% |
| Tuesday | 37 | 78% |
| Wednesday | 44 | 73% |
| Thursday | 43 | 74% |
| Friday | 44 | 68% |
| Saturday | 38 | 79% |
| Sunday | 44 | 82% |
Why it was late
All flights SFO → TUS · Connecting off UA 5688? Check the risk
Questions
How often is UA 5688 from SFO to TUS late?
United Airlines 5688 from San Francisco, CA to Tucson, AZ arrived 15 or more minutes late, was diverted or was cancelled on 25% of 296 scheduled flights between September 2025 and August 2026. 0.3% 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.