Best Time to Fly DEN to BOI: On-Time Stats by Hour & Airline
Denver International → Boise Air Terminal
Data through July 2026 · Last updated October 18, 2026
3,037 flights were scheduled from Denver (DEN) to Boise (BOI) in the last 12 months, and 76.8% of those that flew arrived on time, 0.8 points below the US average of 77.6%.
SkyWest Airlines was the most punctual of the 4 airlines on the route at 80.0%, while Southwest Airlines trailed at 72.1%.
November has been the best month (84% on time) and Friday the weakest day of the week (73%).
0.1% of flights were cancelled, versus 1.8% nationally.
DEN to BOI on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlines | 80.0% | 70 min | 0.1% | 903 |
| Frontier Airlines | 80.0% | 43 min | 0.0% | 130 |
| United Airlines | 78.9% | 56 min | 0.1% | 915 |
| Southwest Airlines | 72.1% | 44 min | 0.1% | 1,089 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to BOI
On-time arrival % by scheduled departure hour (local time), 5,961 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 1 | |
| 7am–8am | 91.3% | 0.0% | 874 |
| 8am–9am | 88.0% | 0.0% | 477 |
| 9am–10am | 78.9% | 0.0% | 204 |
| 10am–11am | 73.2% | 0.0% | 41 |
| 11am–12pm | 83.9% | 0.0% | 758 |
| 12pm–1pm | 61.0% | 0.0% | 42 |
| 1pm–2pm | 76.2% | 0.0% | 236 |
| 2pm–3pm | 70.0% | 0.5% | 198 |
| 3pm–4pm | 74.5% | 0.1% | 687 |
| 4pm–5pm | 75.5% | 0.0% | 253 |
| 5pm–6pm | 66.7% | 0.8% | 133 |
| 6pm–7pm | Limited data | 4 | |
| 7pm–8pm | 71.8% | 0.4% | 765 |
| 8pm–9pm | 65.3% | 1.0% | 728 |
| 9pm–10pm | 63.9% | 0.0% | 336 |
| 10pm–11pm | 55.4% | 0.9% | 224 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DEN to BOI
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 73.3% | -5.7 pts | 0.0% | 106 |
| Christmas & New Year (Dec 20 - Jan 3) | 74.1% | -5.0 pts | 0.0% | 248 |
| Summer peak (Jun 15 - Aug 15) | 65.0% | -14.1 pts | 0.9% | 1,036 |
| All other days | 79.1% | — | 0.1% | 4,571 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).