About 5 in 10 F9 4306 flights from San Francisco arrived 15+ minutes late, diverted or cancelled over the past year (54%); 3.5% were cancelled. The typical flight landed 17 minutes late.
F9 4306: SFO → SAN
Scheduled to leave San Francisco at 10:23 p.m. local time. Over the past year it arrived on time 46% of the time (171 flights), better than other F9 flights on the route at that hour (20%). Last seen in the data Aug 17, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 34 | 41% |
| Tuesday | 13 | — |
| Wednesday | 12 | — |
| Thursday | 29 | 41% |
| Friday | 31 | 45% |
| Saturday | 23 | 70% |
| Sunday | 29 | 41% |
Why it was late
All flights SFO → SAN · Connecting off F9 4306? Check the risk
Questions
How often is F9 4306 from SFO to SAN late?
Frontier Airlines 4306 from San Francisco, CA to San Diego, CA arrived 15 or more minutes late, was diverted or was cancelled on 54% of 171 scheduled flights between September 2025 and August 2026. 3.5% 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 Frontier Airlines for today's flight. Method.