Which departure time was most reliable for DEN to IAH?
Among qualifying DEN-to-IAH departure window results, Early morning had the highest on-time rate: 90.7% of 1,004 flights. Evening was lowest at 72.3% across 1,485 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 1,004 | 90.7% | 4.4% | 0.4% |
| Late morning | 779 | 79.7% | 13.0% | 0.3% |
| Afternoon | 1,142 | 72.9% | 16.7% | 0.2% |
| Evening | 1,485 | 72.3% | 18.7% | 0.0% |
| Night | 263 | 76.4% | 16.0% | 0.8% |
Which weekday was most reliable for DEN to IAH?
Among qualifying DEN-to-IAH weekday results, Tuesday had the highest on-time rate: 81.7% of 661 flights. Friday was lowest at 74.4% across 680 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 679 | 76.9% | 15.3% | 0.4% |
| Tuesday | 661 | 81.7% | 12.0% | 0.5% |
| Wednesday | 649 | 78.3% | 13.7% | 0.0% |
| Thursday | 667 | 79.0% | 14.7% | 0.1% |
| Friday | 680 | 74.4% | 15.0% | 0.1% |
| Saturday | 663 | 79.5% | 10.9% | 0.0% |
| Sunday | 674 | 75.5% | 16.6% | 0.3% |
Which airline was most reliable for DEN to IAH?
Among qualifying DEN-to-IAH airline results, Frontier Airlines had the highest on-time rate: 78.8% of 798 flights. United Airlines was lowest at 77.7% across 3,875 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| United Airlines | 3,875 | 77.7% | 13.9% | 0.2% |
| Frontier Airlines | 798 | 78.8% | 14.7% | 0.1% |
Which month was most reliable for DEN to IAH?
Among qualifying DEN-to-IAH month results, January 2026 had the highest on-time rate: 86.7% of 384 flights. July 2025 was lowest at 56.2% across 402 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 402 | 56.2% | 32.3% | 0.0% |
| August 2025 | 403 | 66.5% | 21.3% | 0.5% |
| September 2025 | 382 | 81.2% | 11.3% | 0.3% |
| October 2025 | 398 | 85.9% | 6.3% | 0.3% |
| November 2025 | 357 | 79.8% | 10.6% | 0.0% |
| December 2025 | 391 | 82.1% | 11.8% | 0.3% |
| January 2026 | 384 | 86.7% | 7.8% | 0.3% |
| February 2026 | 347 | 85.6% | 8.1% | 0.0% |
| March 2026 | 406 | 77.8% | 16.3% | 1.0% |
| April 2026 | 360 | 86.1% | 8.9% | 0.0% |
| May 2026 | 412 | 81.6% | 10.4% | 0.0% |
| June 2026 | 431 | 68.4% | 20.6% | 0.0% |
What drove DEN to IAH delay minutes?
Late aircraft was the largest recorded DEN-to-IAH delay category, accounting for 39.9% of 62,928 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.