Which departure time was most reliable for PHL to STL?
Among qualifying PHL-to-STL departure window results, Early morning had the highest on-time rate: 89.4% of 341 flights. Evening was lowest at 65.4% across 500 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 341 | 89.4% | 5.9% | 0.3% |
| Late morning | 307 | 82.7% | 9.8% | 1.0% |
| Afternoon | 337 | 72.1% | 17.5% | 0.6% |
| Evening | 500 | 65.4% | 23.2% | 2.0% |
| Night | 106 | 74.5% | 16.0% | 5.7% |
Which weekday was most reliable for PHL to STL?
Among qualifying PHL-to-STL weekday results, Wednesday had the highest on-time rate: 81.2% of 223 flights. Thursday was lowest at 70.3% across 239 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 245 | 71.8% | 20.0% | 1.6% |
| Tuesday | 227 | 78.9% | 11.5% | 1.8% |
| Wednesday | 223 | 81.2% | 13.9% | 0.9% |
| Thursday | 239 | 70.3% | 19.7% | 0.4% |
| Friday | 238 | 77.3% | 12.2% | 0.4% |
| Saturday | 172 | 79.7% | 10.5% | 1.7% |
| Sunday | 247 | 74.1% | 17.0% | 2.8% |
Which airline was most reliable for PHL to STL?
Among qualifying PHL-to-STL airline results, Republic Airways had the highest on-time rate: 85.0% of 100 flights. PSA Airlines was lowest at 69.2% across 133 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 725 | 78.1% | 13.9% | 0.3% |
| American Airlines | 633 | 73.5% | 18.2% | 1.1% |
| PSA Airlines | 133 | 69.2% | 15.0% | 9.0% |
| Republic Airways | 100 | 85.0% | 6.0% | 1.0% |
Which month was most reliable for PHL to STL?
Among qualifying PHL-to-STL month results, April 2026 had the highest on-time rate: 85.3% of 129 flights. July 2025 was lowest at 60.7% across 135 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 135 | 60.7% | 28.1% | 2.2% |
| August 2025 | 142 | 72.5% | 19.7% | 0.0% |
| September 2025 | 132 | 78.8% | 14.4% | 0.0% |
| October 2025 | 147 | 81.6% | 12.9% | 0.0% |
| November 2025 | 163 | 79.1% | 10.4% | 1.2% |
| December 2025 | 150 | 63.3% | 23.3% | 0.7% |
| January 2026 | 102 | 77.5% | 8.8% | 4.9% |
| February 2026 | 84 | 83.3% | 2.4% | 8.3% |
| March 2026 | 116 | 74.1% | 17.2% | 2.6% |
| April 2026 | 129 | 85.3% | 8.5% | 0.0% |
| May 2026 | 144 | 80.6% | 12.5% | 0.0% |
| June 2026 | 147 | 77.6% | 17.7% | 0.7% |
What drove PHL to STL delay minutes?
Late aircraft was the largest recorded PHL-to-STL delay category, accounting for 45.9% of 25,705 BTS-attributed delay minutes during July 2025–June 2026.
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