Historical on-time performance
San Diego to San Jose
418 miData through May 2026Source: US DOT · BTS
Flights on SAN–SJC arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 4,918 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time81%Medianon timep9035 minCancel1.2%Flights1,170
- Southwest AirlinesOn-time77%Medianon timep9040 minCancel0.8%Flights3,748
Why flights run late
Delay causes
- Airline23%
- Weather2%
- Air traffic (NAS)9%
- Late aircraft66%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline38%
- Weather44%
- Air traffic (NAS)18%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 45 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SAN → SJC
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 89% on time.
- Mornings89% on time · p90 15 min · 4,267 flights
- Middays78% on time · p90 35 min · 4,117 flights
- Afternoons75% on time · p90 40 min · 3,101 flights
- Evenings70% on time · p90 55 min · 2,928 flights
- Overnights68% on time · p90 50 min · 1,877 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 85% on time.
- Tuesdays85% on time · p90 20 min · 2,165 flights
- Wednesdays85% on time · p90 25 min · 2,159 flights
- Saturdays84% on time · p90 25 min · 1,697 flights
- Thursdays76% on time · p90 40 min · 2,579 flights
- Mondays75% on time · p90 40 min · 2,578 flights
- Sundays73% on time · p90 45 min · 2,497 flights
- Fridays72% on time · p90 50 min · 2,615 flights
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