Which departure time was most reliable for ORD to MIA?
Among qualifying ORD-to-MIA departure window results, Early morning had the highest on-time rate: 83.8% of 1,763 flights. Evening was lowest at 56.7% across 764 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 1,763 | 83.8% | 8.9% | 1.4% |
| Late morning | 917 | 71.0% | 18.9% | 0.9% |
| Afternoon | 1,002 | 65.5% | 22.1% | 1.6% |
| Evening | 764 | 56.7% | 26.8% | 5.0% |
Which weekday was most reliable for ORD to MIA?
Among qualifying ORD-to-MIA weekday results, Tuesday had the highest on-time rate: 79.3% of 623 flights. Sunday was lowest at 62.5% across 654 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 649 | 71.3% | 17.7% | 3.4% |
| Tuesday | 623 | 79.3% | 11.9% | 1.6% |
| Wednesday | 596 | 78.0% | 12.4% | 1.3% |
| Thursday | 639 | 75.0% | 15.3% | 1.1% |
| Friday | 650 | 70.8% | 17.1% | 2.0% |
| Saturday | 639 | 70.4% | 19.6% | 1.4% |
| Sunday | 654 | 62.5% | 24.6% | 2.8% |
Which airline was most reliable for ORD to MIA?
Among qualifying ORD-to-MIA airline results, American Airlines had the highest on-time rate: 74.0% of 3,015 flights. Spirit Airlines was lowest at 57.5% across 348 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| American Airlines | 3,015 | 74.0% | 16.5% | 1.9% |
| United Airlines | 1,041 | 72.9% | 15.3% | 0.6% |
| Spirit Airlines | 348 | 57.5% | 26.4% | 6.3% |
| Frontier Airlines | 46 | 63.0% | 21.7% | 2.2% |
Which month was most reliable for ORD to MIA?
Among qualifying ORD-to-MIA month results, September 2025 had the highest on-time rate: 83.1% of 313 flights. March 2026 was lowest at 61.4% across 497 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 338 | 67.5% | 19.8% | 2.4% |
| August 2025 | 334 | 74.3% | 15.9% | 1.5% |
| September 2025 | 313 | 83.1% | 10.9% | 0.0% |
| October 2025 | 329 | 83.0% | 11.9% | 0.0% |
| November 2025 | 347 | 75.8% | 14.7% | 2.9% |
| December 2025 | 386 | 68.9% | 22.3% | 1.3% |
| January 2026 | 412 | 66.7% | 20.1% | 4.1% |
| February 2026 | 411 | 77.6% | 12.7% | 1.0% |
| March 2026 | 497 | 61.4% | 23.9% | 4.8% |
| April 2026 | 401 | 72.6% | 14.2% | 1.2% |
| May 2026 | 352 | 77.8% | 14.2% | 0.9% |
| June 2026 | 330 | 66.1% | 20.3% | 1.8% |
What drove ORD to MIA delay minutes?
Late aircraft was the largest recorded ORD-to-MIA delay category, accounting for 37.8% of 79,143 BTS-attributed delay minutes during July 2025–June 2026.
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