Which departure time was most reliable for DCA to IAH?
Among qualifying DCA-to-IAH departure window results, Early morning had the highest on-time rate: 88.4% of 951 flights. Evening was lowest at 72.5% across 581 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 951 | 88.4% | 5.6% | 2.4% |
| Late morning | 368 | 85.9% | 9.2% | 0.8% |
| Afternoon | 1,300 | 74.3% | 17.9% | 1.0% |
| Evening | 581 | 72.5% | 16.9% | 4.1% |
Which weekday was most reliable for DCA to IAH?
Among qualifying DCA-to-IAH weekday results, Tuesday had the highest on-time rate: 84.1% of 496 flights. Friday was lowest at 75.5% across 478 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 490 | 78.0% | 14.5% | 2.9% |
| Tuesday | 496 | 84.1% | 10.3% | 1.4% |
| Wednesday | 485 | 80.2% | 12.6% | 1.6% |
| Thursday | 478 | 80.5% | 13.6% | 0.6% |
| Friday | 478 | 75.5% | 15.7% | 1.3% |
| Saturday | 301 | 83.7% | 8.6% | 2.0% |
| Sunday | 472 | 75.8% | 14.6% | 4.0% |
Which airline was most reliable for DCA to IAH?
Among qualifying DCA-to-IAH airline results, United Airlines had the highest on-time rate: 82.8% of 2,413 flights. PSA Airlines was lowest at 64.5% across 276 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| United Airlines | 2,413 | 82.8% | 11.8% | 0.9% |
| Republic Airways | 511 | 71.8% | 14.3% | 5.1% |
| PSA Airlines | 276 | 64.5% | 21.7% | 5.4% |
Which month was most reliable for DCA to IAH?
Among qualifying DCA-to-IAH month results, October 2025 had the highest on-time rate: 87.6% of 291 flights. June 2026 was lowest at 67.5% across 280 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 207 | 72.5% | 20.3% | 2.4% |
| August 2025 | 207 | 81.6% | 13.5% | 1.0% |
| September 2025 | 272 | 86.0% | 9.6% | 0.0% |
| October 2025 | 291 | 87.6% | 6.2% | 0.0% |
| November 2025 | 270 | 78.9% | 11.9% | 3.0% |
| December 2025 | 274 | 79.9% | 14.6% | 0.7% |
| January 2026 | 282 | 78.7% | 8.9% | 6.4% |
| February 2026 | 258 | 87.6% | 7.0% | 2.3% |
| March 2026 | 289 | 79.6% | 13.5% | 3.8% |
| April 2026 | 282 | 83.3% | 12.8% | 0.0% |
| May 2026 | 288 | 70.1% | 20.1% | 1.0% |
| June 2026 | 280 | 67.5% | 20.0% | 2.9% |
What drove DCA to IAH delay minutes?
Late aircraft was the largest recorded DCA-to-IAH delay category, accounting for 43.2% of 48,823 BTS-attributed delay minutes during July 2025–June 2026.
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