Route Reliability
San Francisco → Denver
SFO–DEN · 967 miles · San Francisco International Airport to Denver International Airport
- 77%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 0.5%
- Cancelled
- 5,384
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines83%3,364 flights
- 2.Frontier Airlines77%565 flights
- 3.Southwest Airlines63%1,455 flights
What the data says
Morning flights do better here.
SFO–DEN flights departing between 3–6 AM arrived on time 95% of the time, versus 61% between 3–6 PM.
Thursday is the weak spot.
SFO–DEN flights arrived on time 82% of the time on Saturdays. On Thursdays: 73%.
United Airlines has a clear lead on this route.
United Airlines arrived on time 83% of the time on this route; Southwest Airlines managed 63%.
Slipping a little lately.
SFO–DEN flights arrived on time 77% of the time over the last three months in the data, compared with 82% 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
- Mon75%(794 flights)
- Tue79%(733 flights)
- Wed78%(738 flights)
- Thu73%(796 flights)
- Fri74%(795 flights)
- Sat82%(705 flights)
- Sun77%(774 flights)
- 3–6 AM95%(655 flights)
- 6–9 AM88%(1383 flights)
- 9 AM–12 PM69%(541 flights)
- 12–3 PM63%(1194 flights)
- 3–6 PM61%(629 flights)
- 6–9 PM80%(769 flights)
- 9 PM–12 AM75%(164 flights)
Jun 71% → May 73% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 71% | 461 |
| July 2025 | 67% | 448 |
| August 2025 | 72% | 456 |
| September 2025 | 75% | 450 |
| October 2025 | 82% | 460 |
| November 2025 | 78% | 432 |
| December 2025 | 76% | 452 |
| January 2026 | 88% | 434 |
| February 2026 | 83% | 397 |
| March 2026 | 84% | 442 |
| April 2026 | 76% | 422 |
| May 2026 | 73% | 481 |
Same trip, other airports
Keep nerding
Based on 5,384 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.