San Diego (SAN) to San Jose (SJC): On-Time Performance
Data through July 2026
San Diego (SAN) to San Jose (SJC) effectively runs on two schedules. In January 2026, 87% of arrivals were on time; in July 2026 that fell to 66% — a 21-point seasonal swing. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 69%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 14
- last 12 months
- Duration
- 1h 31m
- scheduled
- Distance
- 417 mi
Best airline from SAN to SJC
5 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlinesmost reliable | 79% | 12 min | 0.8% | 129 |
| Alaska Airlines | 78% | 10 min | 1.2% | 171 |
| SkyWest Airlines | 77% | 13 min | 1.1% | 2,460 |
| Spirit Airlines | 77% | 19 min | 0.8% | 530 |
| Southwest Airlines | 76% | 14 min | 0.8% | 7,893 |
Monthly on-time trend
Best time to fly from SAN to SJC
Aim for departures around 6 a.m. (96% on-time); avoid 7 p.m. departures (65%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 15 min |
| Tuesday | 85% | 8 min |
| Wednesday | 86% | 8 min |
| Thursday | 74% | 16 min |
| Friday | 69% | 20 min |
| Saturdaybest | 86% | 9 min |
| Sunday | 70% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft67%
- Airline operations18%
- National airspace system13%
- Weather1%
Frequently asked questions
- How often are flights from SAN to SJC delayed?
- 24% of SAN–SJC flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 14 minutes.
- Which airline is most reliable from SAN to SJC?
- Frontier Airlines has the best on-time record on this route at 79%, based on 129 flights. 5 airlines flew SAN–SJC frequently enough to compare in this period.
- What is the best time of day to fly from SAN to SJC?
- Departures around 6 a.m. have the best record (96% on-time), while departures around 7 p.m. have the worst (65%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SAN to SJC?
- The scheduled SAN–SJC flight time averages 1h 31m over 417 miles. Actual arrival times vary — flights on this route land 15+ minutes late 24% of the time.
- How often are SAN to SJC flights cancelled?
- 0.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SAN to SJC?
- July 2026 was the roughest month in this dataset, with only 66% of arrivals on time. The best was January 2026 at 87%. If your dates are flexible, that 21-point gap is worth planning around.
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Based on 11,183 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.