Which departure time was most reliable for DEN to BOI?
Among qualifying DEN-to-BOI departure window results, Early morning had the highest on-time rate: 89.7% of 709 flights. Night was lowest at 62.2% across 283 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 709 | 89.7% | 5.5% | 0.0% |
| Late morning | 521 | 83.1% | 9.2% | 0.0% |
| Afternoon | 716 | 72.1% | 16.3% | 0.1% |
| Evening | 810 | 67.4% | 19.9% | 0.5% |
| Night | 283 | 62.2% | 20.8% | 0.4% |
Which weekday was most reliable for DEN to BOI?
Among qualifying DEN-to-BOI weekday results, Wednesday had the highest on-time rate: 80.8% of 416 flights. Friday was lowest at 70.7% across 433 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 423 | 72.3% | 13.7% | 0.0% |
| Tuesday | 431 | 78.7% | 13.7% | 0.0% |
| Wednesday | 416 | 80.8% | 12.5% | 0.2% |
| Thursday | 457 | 74.0% | 13.6% | 0.4% |
| Friday | 433 | 70.7% | 16.2% | 0.2% |
| Saturday | 405 | 78.0% | 13.3% | 0.0% |
| Sunday | 474 | 77.2% | 14.6% | 0.4% |
Which airline was most reliable for DEN to BOI?
Among qualifying DEN-to-BOI airline results, United Airlines had the highest on-time rate: 78.9% of 946 flights. Southwest Airlines was lowest at 71.3% across 1,093 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Southwest Airlines | 1,093 | 71.3% | 16.4% | 0.2% |
| United Airlines | 946 | 78.9% | 12.2% | 0.3% |
| SkyWest Airlines | 874 | 78.1% | 13.3% | 0.1% |
| Frontier Airlines | 126 | 78.6% | 11.1% | 0.0% |
Which month was most reliable for DEN to BOI?
Among qualifying DEN-to-BOI month results, November 2025 had the highest on-time rate: 86.1% of 245 flights. June 2026 was lowest at 59.3% across 253 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 261 | 63.2% | 24.5% | 1.5% |
| August 2025 | 259 | 69.5% | 21.6% | 0.4% |
| September 2025 | 250 | 82.8% | 10.0% | 0.0% |
| October 2025 | 260 | 78.1% | 7.7% | 0.0% |
| November 2025 | 245 | 86.1% | 6.5% | 0.0% |
| December 2025 | 259 | 73.0% | 16.2% | 0.0% |
| January 2026 | 256 | 82.8% | 8.6% | 0.0% |
| February 2026 | 234 | 84.6% | 7.3% | 0.0% |
| March 2026 | 253 | 75.1% | 18.2% | 0.4% |
| April 2026 | 248 | 82.3% | 8.5% | 0.0% |
| May 2026 | 261 | 75.9% | 13.0% | 0.0% |
| June 2026 | 253 | 59.3% | 24.1% | 0.0% |
What drove DEN to BOI delay minutes?
Late aircraft was the largest recorded DEN-to-BOI delay category, accounting for 50.3% of 39,742 BTS-attributed delay minutes during July 2025–June 2026.
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