About 1 in 3 AS 3499 flights from San Jose arrived 15+ minutes late, diverted or cancelled over the past year (30%); 0.4% were cancelled. The typical flight landed 1 minutes early.
AS 3499: SJC → SAN
Scheduled to leave San Jose at 9:09 a.m. local time, operated by SkyWest as OO 3499. Over the past year it arrived on time 70% of the time (279 flights), in line with other AS flights on the route at that hour (70%). Last seen in the data Aug 18, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 46 | 65% |
| Tuesday | 38 | 82% |
| Wednesday | 41 | 73% |
| Thursday | 45 | 71% |
| Friday | 45 | 51% |
| Saturday | 27 | 89% |
| Sunday | 37 | 68% |
Why it was late
All flights SJC → SAN · Connecting off AS 3499? Check the risk
Questions
How often is AS 3499 from SJC to SAN late?
Alaska Airlines 3499 from San Jose, CA to San Diego, CA arrived 15 or more minutes late, was diverted or was cancelled on 30% of 279 scheduled flights between September 2025 and August 2026. 0.4% 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 Alaska Airlines for today's flight. Method.