Route Reliability
Denver → Boise
DEN–BOI · 649 miles · Denver International Airport to Boise Airport
- 77%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 0.2%
- Cancelled
- 3,040
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines80%1,820 flights
- 2.Frontier Airlines80%122 flights
- 3.Southwest Airlines72%1,098 flights
What the data says
Morning flights do better here.
DEN–BOI flights departing between 6–9 AM arrived on time 90% of the time, versus 60% between 9 PM–12 AM.
Thursday is the weak spot.
DEN–BOI flights arrived on time 83% of the time on Wednesdays. On Thursdays: 74%.
United Airlines runs this route best.
United Airlines arrived on time 80% of the time on this route; Southwest Airlines managed 72%.
It basically never cancels.
Out of 3,040 scheduled flights, only 0.2% were cancelled.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon74%(423 flights)
- Tue79%(417 flights)
- Wed83%(415 flights)
- Thu74%(452 flights)
- Fri74%(430 flights)
- Sat79%(404 flights)
- Sun78%(485 flights)
- 6–9 AM90%(707 flights)
- 9 AM–12 PM83%(518 flights)
- 12–3 PM78%(176 flights)
- 3–6 PM73%(608 flights)
- 6–9 PM70%(707 flights)
- 9 PM–12 AM60%(310 flights)
Jun 62% → May 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 62% | 254 |
| July 2025 | 66% | 257 |
| August 2025 | 71% | 258 |
| September 2025 | 83% | 250 |
| October 2025 | 80% | 259 |
| November 2025 | 89% | 239 |
| December 2025 | 73% | 259 |
| January 2026 | 84% | 256 |
| February 2026 | 86% | 233 |
| March 2026 | 76% | 252 |
| April 2026 | 82% | 248 |
| May 2026 | 77% | 261 |
Keep nerding
Based on 3,040 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.