Which departure time was most reliable for MIA to ORD?
Among qualifying MIA-to-ORD departure window results, Early morning had the highest on-time rate: 84.1% of 914 flights. Evening was lowest at 56.0% across 1,014 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 914 | 84.1% | 8.6% | 1.8% |
| Late morning | 426 | 83.1% | 9.9% | 0.7% |
| Afternoon | 1,692 | 63.8% | 23.5% | 2.0% |
| Evening | 1,014 | 56.0% | 26.1% | 2.2% |
| Night | 401 | 71.1% | 17.7% | 3.2% |
Which weekday was most reliable for MIA to ORD?
Among qualifying MIA-to-ORD weekday results, Tuesday had the highest on-time rate: 74.9% of 622 flights. Sunday was lowest at 58.9% across 650 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 648 | 63.4% | 21.0% | 4.0% |
| Tuesday | 622 | 74.9% | 15.3% | 1.1% |
| Wednesday | 597 | 73.5% | 16.9% | 0.8% |
| Thursday | 642 | 69.5% | 17.4% | 1.6% |
| Friday | 652 | 68.7% | 18.9% | 1.4% |
| Saturday | 636 | 72.6% | 19.0% | 1.1% |
| Sunday | 650 | 58.9% | 25.5% | 3.5% |
Which airline was most reliable for MIA to ORD?
Among qualifying MIA-to-ORD airline results, Frontier Airlines had the highest on-time rate: 71.7% of 46 flights. Spirit Airlines was lowest at 58.7% across 346 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| American Airlines | 3,015 | 69.5% | 18.8% | 1.9% |
| United Airlines | 1,040 | 69.6% | 18.6% | 0.9% |
| Spirit Airlines | 346 | 58.7% | 24.3% | 6.1% |
| Frontier Airlines | 46 | 71.7% | 21.7% | 2.2% |
Which month was most reliable for MIA to ORD?
Among qualifying MIA-to-ORD month results, October 2025 had the highest on-time rate: 77.4% of 323 flights. July 2025 was lowest at 54.9% across 337 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 337 | 54.9% | 30.3% | 2.1% |
| August 2025 | 333 | 61.6% | 24.6% | 1.8% |
| September 2025 | 315 | 71.1% | 17.1% | 0.0% |
| October 2025 | 323 | 77.4% | 14.6% | 0.0% |
| November 2025 | 347 | 75.2% | 14.1% | 3.2% |
| December 2025 | 383 | 73.1% | 14.9% | 1.3% |
| January 2026 | 415 | 70.1% | 19.8% | 3.4% |
| February 2026 | 412 | 70.4% | 16.3% | 0.7% |
| March 2026 | 498 | 59.4% | 24.7% | 4.8% |
| April 2026 | 400 | 73.2% | 14.5% | 1.8% |
| May 2026 | 354 | 73.4% | 16.4% | 0.6% |
| June 2026 | 330 | 66.7% | 22.7% | 2.4% |
What drove MIA to ORD delay minutes?
National airspace was the largest recorded MIA-to-ORD delay category, accounting for 35.0% of 94,549 BTS-attributed delay minutes during July 2025–June 2026.
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