Historical on-time performance
Atlanta to San Jose
2,116 miData through May 2026Source: 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)
Cancelled1.3%of scheduled flights
based on 900 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 minCancel1.3%Flights900
Why flights run late
Delay causes
- Airline45%
- Weather12%
- Air traffic (NAS)22%
- Late aircraft21%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline75%
- Weather25%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 12 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 ATL → 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 — 90% on time.
- Mornings90% on time · p90 10 min · 964 flights
- Evenings84% on time · p90 25 min · 856 flights
- Middays82% on time · p90 20 min · 101 flights · limited
- Overnights81% on time · p90 25 min · 437 flights
- Afternoons80% on time · p90 45 min · 173 flights · limited
Best day of week
Wednesdays are the most reliable day to fly this route — 90% on time.
- Wednesdays90% on time · p90 10 min · 345 flights
- Thursdays85% on time · p90 20 min · 394 flights
- Tuesdays85% on time · p90 25 min · 343 flights
- Saturdays85% on time · p90 20 min · 288 flights
- Mondays85% on time · p90 20 min · 375 flights
- Fridays85% on time · p90 25 min · 397 flights
- Sundays81% on time · p90 30 min · 389 flights
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