Best Time to Fly SJU to DEN: On-Time Stats by Hour & Airline
Luis Munoz Marin International → Denver International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 87.2% of San Juan (SJU) to Denver (DEN) flights arrived on time (333 scheduled flights). That is 9.6 points above the national average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
December has been the best month (92% on time) and Sunday the weakest day of the week (80%).
0.3% of flights were cancelled, versus 1.8% nationally.
SJU to DEN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 87.2% | 54 min | 0.3% | 333 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SJU to DEN
On-time arrival % by scheduled departure hour (local time), 639 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 1pm–2pm | 80.3% | 0.0% | 341 |
| 2pm–3pm | 86.3% | 0.7% | 298 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SJU to DEN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 30 | ||
| Summer peak (Jun 15 - Aug 15) | 79.3% | -4.3 pts | 0.0% | 124 |
| All other days | 83.7% | — | 0.2% | 471 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).