Historical on-time performance
San Jose to Denver
948 miData through May 2026Source: US DOT · BTS
Flights on SJC–DEN arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 2,530 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time87%Medianon timep9025 minCancel0.4%Flights1,006
- Southwest AirlinesOn-time77%Medianon timep9040 minCancel0.5%Flights1,524
Why flights run late
Delay causes
- Airline22%
- Weather2%
- Air traffic (NAS)44%
- Late aircraft32%
- Security1%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline55%
- Weather36%
- Air traffic (NAS)9%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 11 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 → DEN
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 10 min · 2,961 flights
- Middays83% on time · p90 25 min · 2,021 flights
- Evenings80% on time · p90 40 min · 1,289 flights
- Overnights78% on time · p90 50 min · 352 flights
- Afternoons74% on time · p90 60 min · 2,073 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 80% to 87% on time.
- Saturdays87% on time · p90 20 min · 1,071 flights
- Wednesdays86% on time · p90 20 min · 1,217 flights
- Tuesdays85% on time · p90 25 min · 1,165 flights
- Sundays83% on time · p90 30 min · 1,287 flights
- Mondays81% on time · p90 35 min · 1,321 flights
- Thursdays81% on time · p90 30 min · 1,307 flights
- Fridays80% on time · p90 40 min · 1,328 flights
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