Historical on-time performance
Denver to San Juan
2,733 miData through Dec 2025Source: US DOT · BTS
Flights on DEN–SJU arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 276 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time73%Medianon timep9040 minCancel0.0%Flights276
Why flights run late
Delay causes
- Airline31%
- Weather0%
- Air traffic (NAS)39%
- Late aircraft31%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DEN → SJU
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best day of week
On-time rates are fairly even by day on this route — ranging from 65% to 83% on time.
- Tuesdays83% on time · p90 25 min · 98 flights · limited
- Wednesdays80% on time · p90 30 min · 98 flights · limited
- Mondays77% on time · p90 40 min · 99 flights · limited
- Fridays76% on time · p90 30 min · 98 flights · limited
- Sundays68% on time · p90 40 min · 100 flights · limited
- Saturdays67% on time · p90 40 min · 113 flights · limited
- Thursdays65% on time · p90 35 min · 98 flights · limited
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