Which departure time was most reliable for DCA to STL?
Among qualifying DCA-to-STL departure window results, Early morning had the highest on-time rate: 82.5% of 616 flights. Evening was lowest at 59.5% across 684 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 616 | 82.5% | 10.2% | 1.9% |
| Late morning | 66 | 80.3% | 13.6% | 1.5% |
| Afternoon | 1,042 | 72.7% | 15.8% | 1.5% |
| Evening | 684 | 59.5% | 26.2% | 4.2% |
Which weekday was most reliable for DCA to STL?
Among qualifying DCA-to-STL weekday results, Saturday had the highest on-time rate: 78.3% of 217 flights. Sunday was lowest at 61.8% across 322 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 375 | 73.1% | 17.3% | 3.2% |
| Tuesday | 384 | 78.1% | 15.6% | 0.8% |
| Wednesday | 375 | 72.0% | 17.9% | 2.1% |
| Thursday | 370 | 73.5% | 15.4% | 1.4% |
| Friday | 371 | 66.3% | 19.7% | 2.2% |
| Saturday | 217 | 78.3% | 13.4% | 1.4% |
| Sunday | 322 | 61.8% | 20.5% | 5.9% |
Which airline was most reliable for DCA to STL?
Among qualifying DCA-to-STL airline results, Republic Airways had the highest on-time rate: 77.0% of 200 flights. PSA Airlines was lowest at 63.9% across 615 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 1,403 | 74.7% | 14.1% | 1.2% |
| PSA Airlines | 615 | 63.9% | 24.1% | 4.9% |
| Republic Airways | 200 | 77.0% | 13.0% | 3.5% |
| American Airlines | 175 | 66.9% | 24.6% | 2.3% |
| Envoy Air | 21 | 90.5% | 9.5% | 0.0% |
Which month was most reliable for DCA to STL?
Among qualifying DCA-to-STL month results, September 2025 had the highest on-time rate: 80.6% of 216 flights. July 2025 was lowest at 57.0% across 200 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 200 | 57.0% | 29.0% | 6.0% |
| August 2025 | 197 | 79.2% | 13.2% | 0.5% |
| September 2025 | 216 | 80.6% | 13.9% | 0.9% |
| October 2025 | 223 | 74.0% | 15.7% | 0.0% |
| November 2025 | 209 | 72.7% | 16.7% | 1.9% |
| December 2025 | 203 | 65.5% | 20.2% | 1.5% |
| January 2026 | 199 | 75.4% | 13.6% | 6.5% |
| February 2026 | 179 | 74.3% | 15.1% | 3.4% |
| March 2026 | 200 | 71.0% | 19.0% | 3.0% |
| April 2026 | 193 | 75.6% | 12.4% | 0.5% |
| May 2026 | 197 | 71.1% | 19.3% | 2.0% |
| June 2026 | 198 | 63.6% | 19.2% | 3.0% |
What drove DCA to STL delay minutes?
Late aircraft was the largest recorded DCA-to-STL delay category, accounting for 51.4% of 45,204 BTS-attributed delay minutes during July 2025–June 2026.
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