Historical on-time performance
San Juan to Denver
2,733 miData through Dec 2025Source: US DOT · BTS
Flights on SJU–DEN arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.4%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-time77%Medianon timep9030 minCancel0.4%Flights276
Why flights run late
Delay causes
- Airline8%
- Weather0%
- Air traffic (NAS)54%
- Late aircraft37%
- 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 SJU → DEN
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Afternoons are the most reliable time of day to fly this route — 80% on time.
- Afternoons80% on time · p90 25 min · 358 flights
- Middays63% on time · p90 40 min · 346 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 76% on time.
- Wednesdays76% on time · p90 30 min · 98 flights · limited
- Fridays74% on time · p90 35 min · 98 flights · limited
- Sundays73% on time · p90 30 min · 100 flights · limited
- Saturdays71% on time · p90 40 min · 113 flights · limited
- Tuesdays70% on time · p90 40 min · 98 flights · limited
- Thursdays69% on time · p90 35 min · 98 flights · limited
- Mondays68% on time · p90 50 min · 99 flights · limited
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