Best Time to Fly SJC to SAN: On-Time Stats by Hour & Airline
Norman Y. Mineta San Jose International → San Diego International
Data through July 2026 · Last updated October 18, 2026
4,986 flights were scheduled from San Jose (SJC) to San Diego (SAN) in the last 12 months, and 70.7% of those that flew arrived on time, 6.9 points below the US average of 77.6%.
Alaska Airlines was the most punctual of the 3 airlines on the route at 83.8%, while Southwest Airlines trailed at 69.0%.
January has been the best month (84% on time) and Friday the weakest day of the week (64%).
1.0% of flights were cancelled, versus 1.8% nationally.
SJC to SAN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlines | 83.8% | 49 min | 0.0% | 80 |
| SkyWest Airlines | 75.3% | 49 min | 1.4% | 1,159 |
| Southwest Airlines | 69.0% | 46 min | 0.9% | 3,740 |
| Spirit Airlines | Limited data | 7 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SJC to SAN
On-time arrival % by scheduled departure hour (local time), 10,701 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 89.4% | 1.1% | 945 |
| 7am–8am | 88.0% | 0.8% | 732 |
| 8am–9am | 81.2% | 0.8% | 669 |
| 9am–10am | 84.8% | 1.1% | 558 |
| 10am–11am | 73.7% | 0.3% | 1,147 |
| 11am–12pm | 71.4% | 0.9% | 673 |
| 12pm–1pm | 76.4% | 0.7% | 543 |
| 1pm–2pm | 76.6% | 0.5% | 571 |
| 2pm–3pm | 74.2% | 0.9% | 776 |
| 3pm–4pm | 73.2% | 1.1% | 693 |
| 4pm–5pm | 69.8% | 0.0% | 414 |
| 5pm–6pm | 70.6% | 1.4% | 870 |
| 6pm–7pm | 59.8% | 2.0% | 751 |
| 7pm–8pm | 55.9% | 1.4% | 696 |
| 8pm–9pm | 68.8% | 0.8% | 397 |
| 9pm–10pm | 65.3% | 1.6% | 249 |
| 10pm–11pm | Limited data | 17 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SJC to SAN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 77.2% | +0.7 pts | 0.0% | 220 |
| Christmas & New Year (Dec 20 - Jan 3) | 57.1% | -19.4 pts | 4.2% | 424 |
| Summer peak (Jun 15 - Aug 15) | 68.6% | -7.9 pts | 0.7% | 1,951 |
| All other days | 76.5% | — | 0.9% | 8,106 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).