Historical on-time performance
Denver to San Jose
949 miData through May 2026Source: US DOT · BTS
Flights on DEN–SJC arrive on time 74% of the time over the last 12 months.
On-time rate74%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 2,535 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time80%Medianon timep9045 minCancel0.0%Flights1,004
- Southwest AirlinesOn-time70%Medianon timep9050 minCancel0.7%Flights1,531
Why flights run late
Delay causes
- Airline32%
- Weather2%
- Air traffic (NAS)8%
- Late aircraft58%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline30%
- Weather30%
- Air traffic (NAS)40%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 10 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 DEN → 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 — 89% on time.
- Mornings89% on time · p90 15 min · 2,081 flights
- Middays81% on time · p90 30 min · 2,316 flights
- Afternoons76% on time · p90 40 min · 1,361 flights
- Evenings66% on time · p90 75 min · 1,923 flights
- Overnights60% on time · p90 70 min · 1,075 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 79% on time.
- Wednesdays79% on time · p90 35 min · 1,224 flights
- Tuesdays78% on time · p90 45 min · 1,179 flights
- Mondays76% on time · p90 40 min · 1,335 flights
- Thursdays76% on time · p90 45 min · 1,317 flights
- Sundays75% on time · p90 50 min · 1,308 flights
- Fridays74% on time · p90 45 min · 1,335 flights
- Saturdays74% on time · p90 50 min · 1,058 flights
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