Which departure time was most reliable for ORD to SJU?
Among qualifying ORD-to-SJU departure window results, Early morning had the highest on-time rate: 77.0% of 713 flights. Evening was lowest at 42.2% across 154 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 713 | 77.0% | 12.9% | 1.3% |
| Afternoon | 429 | 73.4% | 15.6% | 1.6% |
| Evening | 154 | 42.2% | 40.3% | 7.1% |
| Night | 82 | 75.6% | 13.4% | 1.2% |
Which weekday was most reliable for ORD to SJU?
Among qualifying ORD-to-SJU weekday results, Wednesday had the highest on-time rate: 78.0% of 186 flights. Sunday was lowest at 66.7% across 201 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 208 | 67.8% | 20.7% | 2.9% |
| Tuesday | 192 | 75.5% | 17.2% | 1.6% |
| Wednesday | 186 | 78.0% | 15.6% | 0.0% |
| Thursday | 201 | 73.6% | 12.9% | 1.5% |
| Friday | 207 | 72.0% | 15.0% | 1.4% |
| Saturday | 208 | 72.1% | 13.0% | 4.3% |
| Sunday | 201 | 66.7% | 22.9% | 2.0% |
Which airline was most reliable for ORD to SJU?
Among qualifying ORD-to-SJU airline results, United Airlines had the highest on-time rate: 78.6% of 665 flights. Spirit Airlines was lowest at 58.2% across 297 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| United Airlines | 665 | 78.6% | 11.6% | 0.3% |
| American Airlines | 429 | 71.6% | 19.1% | 1.4% |
| Spirit Airlines | 297 | 58.2% | 25.6% | 6.7% |
| Frontier Airlines | 12 | 75.0% | 0.0% | 0.0% |
Which month was most reliable for ORD to SJU?
Among qualifying ORD-to-SJU month results, February 2026 had the highest on-time rate: 87.1% of 139 flights. March 2026 was lowest at 56.4% across 179 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 127 | 71.7% | 16.5% | 0.0% |
| August 2025 | 111 | 71.2% | 16.2% | 0.9% |
| September 2025 | 51 | 78.4% | 11.8% | 0.0% |
| October 2025 | 74 | 79.7% | 8.1% | 0.0% |
| November 2025 | 100 | 73.0% | 20.0% | 1.0% |
| December 2025 | 131 | 73.3% | 20.6% | 0.0% |
| January 2026 | 155 | 63.2% | 16.1% | 8.4% |
| February 2026 | 139 | 87.1% | 8.6% | 0.0% |
| March 2026 | 179 | 56.4% | 26.3% | 5.0% |
| April 2026 | 140 | 75.7% | 15.7% | 2.9% |
| May 2026 | 105 | 81.9% | 6.7% | 0.0% |
| June 2026 | 91 | 68.1% | 26.4% | 0.0% |
What drove ORD to SJU delay minutes?
Airline was the largest recorded ORD-to-SJU delay category, accounting for 33.5% of 21,289 BTS-attributed delay minutes during July 2025–June 2026.
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