Historical on-time performance
Atlanta to San Jose
2,116 miData through Dec 2025Source: US DOT · BTS
Flights on ATL–SJC arrive on time 85% of the time over the last 12 months.
On-time rate85%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights
based on 885 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time85%Medianon timep9020 minCancel1.1%Flights885
Why flights run late
Delay causes
- Airline46%
- Weather14%
- Air traffic (NAS)22%
- Late aircraft19%
- Security1%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ATL → 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 — 88% on time.
- Mornings88% on time · p90 15 min · 1,050 flights
- Evenings84% on time · p90 25 min · 837 flights
- Afternoons81% on time · p90 40 min · 167 flights · limited
- Overnights81% on time · p90 25 min · 418 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 91% on time.
- Wednesdays91% on time · p90 10 min · 341 flights
- Saturdays86% on time · p90 20 min · 269 flights
- Tuesdays85% on time · p90 20 min · 338 flights
- Fridays85% on time · p90 25 min · 392 flights
- Thursdays85% on time · p90 20 min · 390 flights
- Mondays83% on time · p90 25 min · 373 flights
- Sundays80% on time · p90 30 min · 384 flights
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