About 1 in 2 UA 4683 flights from Tucson arrived 15+ minutes late, diverted or cancelled over the past year (42%); 0.0% were cancelled. The typical flight landed 9 minutes late.
UA 4683: TUS → SFO
Scheduled to leave Tucson at 7:02 a.m. local time, operated by SkyWest as OO 4683. Over the past year it arrived on time 58% of the time (333 flights), worse than other UA flights on the route at that hour (79%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 49 | 49% |
| Tuesday | 48 | 60% |
| Wednesday | 48 | 58% |
| Thursday | 47 | 51% |
| Friday | 47 | 49% |
| Saturday | 47 | 66% |
| Sunday | 47 | 70% |
Why it was late
All flights TUS → SFO · Connecting off UA 4683? Check the risk
Questions
How often is UA 4683 from TUS to SFO late?
United Airlines 4683 from Tucson, AZ to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 42% of 333 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.