Historical on-time performance
San Jose to Los Angeles
308 miData through May 2026Source: US DOT · BTS
Flights on SJC–LAX arrive on time 87% of the time over the last 12 months.
On-time rate87%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 4,321 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesbestOn-time92%Medianon timep905 minCancel0.4%Flights2,153
- Delta Air LinesOn-time89%Medianon timep905 minCancel3.3%Flights360
- Southwest AirlinesOn-time80%Medianon timep9030 minCancel0.3%Flights1,808
Why flights run late
Delay causes
- Airline42%
- Weather5%
- Air traffic (NAS)12%
- Late aircraft41%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline62%
- Weather15%
- Air traffic (NAS)23%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 26 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 → LAX
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 — 92% on time.
- Mornings92% on time · p90 5 min · 4,899 flights
- Middays89% on time · p90 15 min · 3,086 flights
- Afternoons85% on time · p90 20 min · 2,575 flights
- Evenings82% on time · p90 30 min · 3,129 flights
- Overnights80% on time · p90 40 min · 1,512 flights
Best day of week
Tuesdays are the most reliable day to fly this route — 92% on time.
- Tuesdays92% on time · p90 10 min · 2,092 flights
- Wednesdays90% on time · p90 10 min · 2,066 flights
- Saturdays89% on time · p90 15 min · 1,813 flights
- Thursdays87% on time · p90 20 min · 2,295 flights
- Mondays86% on time · p90 25 min · 2,305 flights
- Fridays84% on time · p90 25 min · 2,329 flights
- Sundays82% on time · p90 25 min · 2,301 flights
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