Which departure time was most reliable for ORD to ATL?
Among qualifying ORD-to-ATL departure window results, Early morning had the highest on-time rate: 83.2% of 1,734 flights. Evening was lowest at 58.0% across 1,496 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 1,734 | 83.2% | 9.9% | 1.8% |
| Late morning | 1,488 | 81.2% | 11.0% | 1.4% |
| Afternoon | 1,689 | 69.3% | 19.7% | 2.5% |
| Evening | 1,496 | 58.0% | 27.3% | 3.3% |
Which weekday was most reliable for ORD to ATL?
Among qualifying ORD-to-ATL weekday results, Wednesday had the highest on-time rate: 77.7% of 900 flights. Sunday was lowest at 68.1% across 939 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 957 | 69.4% | 19.4% | 3.4% |
| Tuesday | 914 | 77.6% | 13.3% | 1.3% |
| Wednesday | 900 | 77.7% | 14.7% | 1.0% |
| Thursday | 935 | 74.7% | 15.0% | 1.5% |
| Friday | 945 | 70.5% | 17.8% | 2.5% |
| Saturday | 819 | 75.1% | 16.7% | 2.3% |
| Sunday | 939 | 68.1% | 20.2% | 3.6% |
Which airline was most reliable for ORD to ATL?
Among qualifying ORD-to-ATL airline results, Delta Air Lines had the highest on-time rate: 78.3% of 2,623 flights. SkyWest Airlines was lowest at 60.0% across 40 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 2,623 | 78.3% | 12.7% | 2.4% |
| United Airlines | 1,611 | 73.7% | 16.3% | 1.1% |
| Frontier Airlines | 713 | 65.5% | 22.9% | 3.1% |
| American Airlines | 689 | 63.1% | 27.0% | 3.0% |
| Envoy Air | 366 | 76.0% | 14.8% | 2.2% |
| Republic Airways | 287 | 68.3% | 15.3% | 4.5% |
| Spirit Airlines | 75 | 60.0% | 26.7% | 0.0% |
| SkyWest Airlines | 40 | 60.0% | 27.5% | 2.5% |
| PSA Airlines | 5 | 80.0% | 20.0% | 0.0% |
Which month was most reliable for ORD to ATL?
Among qualifying ORD-to-ATL month results, September 2025 had the highest on-time rate: 87.1% of 543 flights. March 2026 was lowest at 59.8% across 515 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 569 | 63.8% | 24.3% | 2.3% |
| August 2025 | 573 | 76.6% | 15.9% | 1.7% |
| September 2025 | 543 | 87.1% | 8.8% | 0.0% |
| October 2025 | 569 | 78.0% | 13.2% | 0.0% |
| November 2025 | 526 | 73.6% | 16.0% | 5.1% |
| December 2025 | 491 | 62.7% | 22.0% | 3.5% |
| January 2026 | 444 | 71.6% | 17.1% | 2.3% |
| February 2026 | 445 | 82.7% | 9.7% | 0.0% |
| March 2026 | 515 | 59.8% | 23.5% | 5.8% |
| April 2026 | 554 | 71.5% | 17.0% | 2.9% |
| May 2026 | 597 | 75.4% | 15.7% | 1.2% |
| June 2026 | 583 | 74.8% | 17.7% | 2.6% |
What drove ORD to ATL delay minutes?
Late aircraft was the largest recorded ORD-to-ATL delay category, accounting for 47.2% of 126,502 BTS-attributed delay minutes during July 2025–June 2026.
Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.