F91229
F91229 (Frontier Airlines) flies Denver to San Francisco. Of 242 departures recorded from November 2024 to July 2026, 67.4% left on time, according to the US BTS.
Recorded departures by month
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 7 | 9 | ▲ 28.6% |
| February | 5 | 10 | ▲ 100.0% |
| March | – | 4 | – |
| April | 8 | 10 | ▲ 25.0% |
| May | 28 | 19 | ▼ 32.1% |
| June | 14 | 30 | ▲ 114.3% |
| July | – | 12 | – |
| August | 7 | – | – |
| September | 17 | – | – |
| October | 18 | – | in progress |
| November | 21 | – | – |
| December | 17 | – | – |
according to the US BTS · November 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 42.9% | 88.9% | ▲ 107.4% |
| February | 60.0% | 100.0% | ▲ 66.7% |
| March | – | 100.0% | – |
| April | 62.5% | 90.0% | ▲ 44.0% |
| May | 75.0% | 57.9% | ▼ 22.8% |
| June | 64.3% | 16.7% | ▼ 74.1% |
| July | – | 8.3% | – |
| August | 100.0% | – | – |
| September | 88.2% | – | – |
| October | 72.2% | – | in progress |
| November | 90.5% | – | – |
| December | 88.2% | – | – |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | – | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
according to the US BTS · November 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 100.0% 242
- Cancelled 0.0% 0
Share of all recorded flights in the period, all legs. · Nov 10, 2024 → Jul 29, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN SFO Denver International Airport – San Francisco International Airport | 1,553 | 16.4 min | 67.4% | 242 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 2 | 2 | 100.0% | 0 |
| December 2024 | 4 | 4 | 75.0% | 0 |
| January 2025 | 7 | 7 | 42.9% | 0 |
| February 2025 | 5 | 5 | 60.0% | 0 |
| April 2025 | 8 | 8 | 62.5% | 0 |
| May 2025 | 28 | 28 | 75.0% | 0 |
| June 2025 | 14 | 14 | 64.3% | 0 |
| August 2025 | 7 | 7 | 100.0% | 0 |
| September 2025 | 17 | 17 | 88.2% | 0 |
| October 2025 | 18 | 18 | 72.2% | 0 |
| November 2025 | 21 | 21 | 90.5% | 0 |
| December 2025 | 17 | 17 | 88.2% | 0 |
| January 2026 | 9 | 9 | 88.9% | 0 |
| February 2026 | 10 | 10 | 100.0% | 0 |
| March 2026 | 4 | 4 | 100.0% | 0 |
| April 2026 | 10 | 10 | 90.0% | 0 |
| May 2026 | 19 | 19 | 57.9% | 0 |
| June 2026 | 30 | 30 | 16.7% | 0 |
| July 2026 | 12 | 12 | 8.3% | 0 |