About 1 in 3 UA 4733 flights from Boise arrived 15+ minutes late, diverted or cancelled over the past year (39%); 0.0% were cancelled. The typical flight landed 6 minutes late.
UA 4733: BOI → SFO
Scheduled to leave Boise at 10:35 a.m. local time, operated by SkyWest as OO 4733. Over the past year it arrived on time 61% of the time (337 flights), in line with other UA flights on the route at that hour (60%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 50 | 50% |
| Tuesday | 47 | 74% |
| Wednesday | 47 | 60% |
| Thursday | 49 | 53% |
| Friday | 49 | 49% |
| Saturday | 46 | 78% |
| Sunday | 49 | 61% |
Why it was late
All flights BOI → SFO · Connecting off UA 4733? Check the risk
Questions
How often is UA 4733 from BOI to SFO late?
United Airlines 4733 from Boise, ID to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 39% of 337 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.