Denver (DEN) to San Juan (SJU): On-Time Performance
Data through May 2026
Denver (DEN) to San Juan (SJU) is a thinner route than most in this dataset — 333 departures over the past year, roughly 6 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 74% arrived on time.
- On-time
- 74%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 0.91
- last 12 months
- Duration
- 5h 43m
- scheduled
- Distance
- 2,733 mi
Monthly on-time trend
Best time to fly from DEN to SJU
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Mondaybest | 80% | 13 min |
| Tuesday | 80% | 11 min |
| Wednesday | 80% | 11 min |
| Thursday | 71% | 11 min |
| Friday | 76% | 15 min |
| Saturday | 68% | 15 min |
| Sunday | 65% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft23%
- Airline operations27%
- National airspace system47%
- Weather3%
Frequently asked questions
- How often are flights from DEN to SJU delayed?
- 26% of DEN–SJU flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 13 minutes.
- How long is the flight from DEN to SJU?
- The scheduled DEN–SJU flight time averages 5h 43m over 2,733 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
- How often are DEN to SJU flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from DEN to SJU?
- June 2025 was the roughest month in this dataset, with only 47% of arrivals on time. The best was May 2026 at 97%. If your dates are flexible, that 50-point gap is worth planning around.
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Based on 639 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.