Historical on-time performance
Boise to San Jose
523 miData through Dec 2025Source: US DOT · BTS
Flights on BOI–SJC arrive on time 86% of the time over the last 12 months.
On-time rate86%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 623 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 timep9010 minCancel0.4%Flights275
- Southwest AirlinesOn-time81%Medianon timep9030 minCancel0.0%Flights348
Why flights run late
Delay causes
- Airline25%
- Weather0%
- Air traffic (NAS)4%
- Late aircraft71%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly BOI → SJC
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 94% on time.
- Mornings94% on time · p90 5 min · 612 flights
- Middays91% on time · p90 10 min · 862 flights
- Afternoons81% on time · p90 25 min · 451 flights
- Evenings78% on time · p90 30 min · 187 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 84% to 93% on time.
- Wednesdays93% on time · p90 10 min · 294 flights
- Saturdays92% on time · p90 5 min · 219 flights
- Tuesdays90% on time · p90 10 min · 297 flights
- Sundays90% on time · p90 10 min · 306 flights
- Thursdays88% on time · p90 20 min · 330 flights
- Fridays85% on time · p90 25 min · 333 flights
- Mondays84% on time · p90 25 min · 334 flights
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