Which departure time was most reliable for SAN to ORD?
Among qualifying SAN-to-ORD departure window results, Night had the highest on-time rate: 93.4% of 484 flights. Afternoon was lowest at 63.4% across 1,335 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 1,013 | 82.7% | 9.4% | 1.8% |
| Late morning | 536 | 79.9% | 11.2% | 0.7% |
| Afternoon | 1,335 | 63.4% | 22.5% | 1.3% |
| Evening | 439 | 76.5% | 14.4% | 1.4% |
| Night | 484 | 93.4% | 3.1% | 1.2% |
Which weekday was most reliable for SAN to ORD?
Among qualifying SAN-to-ORD weekday results, Tuesday had the highest on-time rate: 82.9% of 533 flights. Sunday was lowest at 70.6% across 571 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 566 | 73.5% | 15.2% | 1.8% |
| Tuesday | 533 | 82.9% | 9.8% | 0.6% |
| Wednesday | 516 | 77.7% | 13.2% | 1.6% |
| Thursday | 561 | 75.9% | 12.8% | 0.9% |
| Friday | 561 | 75.4% | 16.9% | 0.7% |
| Saturday | 499 | 78.0% | 14.4% | 1.8% |
| Sunday | 571 | 70.6% | 15.4% | 2.1% |
Which airline was most reliable for SAN to ORD?
Among qualifying SAN-to-ORD airline results, United Airlines had the highest on-time rate: 80.7% of 1,672 flights. Frontier Airlines was lowest at 37.7% across 61 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,672 | 80.7% | 10.6% | 0.5% |
| American Airlines | 1,386 | 75.0% | 15.2% | 1.8% |
| Alaska Airlines | 688 | 70.8% | 16.7% | 2.3% |
| Frontier Airlines | 61 | 37.7% | 50.8% | 1.6% |
Which month was most reliable for SAN to ORD?
Among qualifying SAN-to-ORD month results, February 2026 had the highest on-time rate: 85.5% of 242 flights. July 2025 was lowest at 69.6% across 336 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 336 | 69.6% | 19.9% | 1.5% |
| August 2025 | 320 | 70.3% | 18.4% | 0.9% |
| September 2025 | 269 | 82.5% | 11.2% | 0.4% |
| October 2025 | 357 | 82.1% | 9.0% | 1.1% |
| November 2025 | 318 | 71.1% | 16.7% | 3.8% |
| December 2025 | 309 | 75.4% | 14.9% | 2.3% |
| January 2026 | 247 | 75.7% | 14.2% | 1.2% |
| February 2026 | 242 | 85.5% | 7.4% | 0.0% |
| March 2026 | 332 | 70.5% | 16.3% | 2.7% |
| April 2026 | 333 | 77.5% | 14.7% | 0.3% |
| May 2026 | 364 | 82.4% | 7.4% | 0.5% |
| June 2026 | 380 | 73.9% | 16.6% | 1.1% |
What drove SAN to ORD delay minutes?
Late aircraft was the largest recorded SAN-to-ORD delay category, accounting for 36.3% of 66,175 BTS-attributed delay minutes during July 2025–June 2026.
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