Route Reliability
Sacramento → Denver
SMF–DEN · 909 miles · Sacramento International Airport to Denver International Airport
- 82%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 0.4%
- Cancelled
- 3,827
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines88%1,802 flights
- 2.Frontier Airlines82%164 flights
- 3.Southwest Airlines77%1,861 flights
What the data says
Morning flights do better here.
SMF–DEN flights departing between 3–6 AM arrived on time 96% of the time, versus 69% between 3–6 PM.
Saturday comes out ahead.
A small edge: 86% on time on Saturdays against 80% on Thursdays.
United Airlines runs this route best.
United Airlines arrived on time 88% of the time on this route; Southwest Airlines managed 77%.
Ticking up lately.
SMF–DEN flights arrived on time 86% of the time over the last three months in the data, compared with 83% in the three months before that.
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
- Mon82%(596 flights)
- Tue83%(506 flights)
- Wed83%(533 flights)
- Thu80%(566 flights)
- Fri81%(602 flights)
- Sat86%(433 flights)
- Sun83%(559 flights)
- 3–6 AM96%(564 flights)
- 6–9 AM94%(666 flights)
- 9 AM–12 PM90%(569 flights)
- 12–3 PM75%(919 flights)
- 3–6 PM69%(560 flights)
- 6–9 PM72%(517 flights)
Jun 75% → May 86% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 75% | 367 |
| July 2025 | 70% | 374 |
| August 2025 | 80% | 343 |
| September 2025 | 82% | 342 |
| October 2025 | 91% | 335 |
| November 2025 | 87% | 315 |
| December 2025 | 75% | 299 |
| January 2026 | 85% | 262 |
| February 2026 | 88% | 258 |
| March 2026 | 85% | 291 |
| April 2026 | 88% | 290 |
| May 2026 | 86% | 319 |
Keep nerding
Based on 3,827 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.