Route Reliability
Denver → San Juan
DEN–SJU · 2,733 miles · Denver International Airport to Luis Muñoz Marín International Airport
- 78%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 0.3%
- Cancelled
- 333
- Flights in the data
Data through May 2026.
United Airlines is the only airline in this data on this route, arriving on time 78% of the time across 333 flights. No comparison to make.
What the data says
Sunday scaries are real for this one.
DEN–SJU flights arrived on time 86% of the time on Wednesdays and just 67% on Sundays. That gap is worth planning around.
It basically never cancels.
Out of 333 scheduled flights, only 0.3% were cancelled.
Ticking up lately.
DEN–SJU flights arrived on time 88% of the time over the last three months in the data, compared with 84% in the three months before that.
The breakdown
- Mon85%(47 flights)
- Tue83%(46 flights)
- Wed86%(44 flights)
- Thu79%(47 flights)
- Fri78%(45 flights)
- Sat69%(51 flights)
- Sun67%(46 flights)
Jun 50% → May 97% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 50% | 28 |
| July 2025 | 53% | 30 |
| August 2025 | 50% | 20 |
| October 2025 | 87% | 31 |
| November 2025 | 93% | 29 |
| December 2025 | 81% | 31 |
| January 2026 | 87% | 30 |
| February 2026 | 86% | 28 |
| March 2026 | 72% | 29 |
| April 2026 | 93% | 30 |
| May 2026 | 97% | 31 |
Keep nerding
Based on 333 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.