Historical on-time performance
San Jose to San Diego
418 miData through May 2026Source: US DOT · BTS
Flights on SJC–SAN arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 4,928 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time77%Medianon timep9035 minCancel1.3%Flights1,182
- Southwest AirlinesOn-time72%Medianon timep9040 minCancel1.0%Flights3,746
Why flights run late
Delay causes
- Airline21%
- Weather2%
- Air traffic (NAS)36%
- Late aircraft40%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline39%
- Weather44%
- Air traffic (NAS)17%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 54 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 SJC → SAN
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 — 87% on time.
- Mornings87% on time · p90 15 min · 4,335 flights
- Middays78% on time · p90 30 min · 4,305 flights
- Afternoons76% on time · p90 40 min · 3,308 flights
- Overnights68% on time · p90 50 min · 1,086 flights
- Evenings65% on time · p90 50 min · 3,383 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 67% to 85% on time.
- Tuesdays85% on time · p90 20 min · 2,182 flights
- Saturdays85% on time · p90 20 min · 1,705 flights
- Wednesdays81% on time · p90 30 min · 2,175 flights
- Mondays77% on time · p90 35 min · 2,599 flights
- Thursdays73% on time · p90 40 min · 2,598 flights
- Sundays73% on time · p90 40 min · 2,517 flights
- Fridays67% on time · p90 50 min · 2,641 flights
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