F91500
F91500 (Frontier Airlines) flies Ontario to Denver. Of 571 departures recorded from October 2024 to July 2026, 86.6% left on time, according to the US BTS.
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 19 | 31 | ▲ 63.2% |
| February | 23 | 28 | ▲ 21.7% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 27 | 31 | ▲ 14.8% |
| June | 24 | 30 | ▲ 25.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 4 | – | – |
| October | 25 | – | in progress |
| November | 30 | – | – |
| December | 18 | – | – |
| Year to date (Jan–Jul) | 185 | 212 | ▲ 14.6% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 73.7% | 93.6% | ▲ 27.0% |
| February | 78.3% | 89.3% | ▲ 14.1% |
| March | 87.1% | 87.1% | 0.0% |
| April | 86.2% | 90.0% | ▲ 4.4% |
| May | 84.6% | 96.8% | ▲ 14.4% |
| June | 66.7% | 96.7% | ▲ 45.0% |
| July | 63.3% | 93.6% | ▲ 47.7% |
| August | 61.3% | – | – |
| September | 75.0% | – | – |
| October | 95.8% | – | in progress |
| November | 96.7% | – | – |
| December | 83.3% | – | – |
| Year-to-date average (Jan–Jul) | 77.1% | 92.4% | ▲ 19.8% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 0 | ▼ 100.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 99.3% 567
- Cancelled 0.7% 4
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ONT DEN Ontario International Airport – Denver International Airport | 1,316 | 4.0 min | 86.6% | 571 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 100.0% | 0 |
| November 2024 | 27 | 27 | 96.3% | 0 |
| December 2024 | 20 | 20 | 100.0% | 0 |
| January 2025 | 19 | 19 | 73.7% | 0 |
| February 2025 | 23 | 23 | 78.3% | 0 |
| March 2025 | 31 | 31 | 87.1% | 0 |
| April 2025 | 30 | 29 | 86.2% | 1 |
| May 2025 | 27 | 26 | 84.6% | 1 |
| June 2025 | 24 | 24 | 66.7% | 0 |
| July 2025 | 31 | 30 | 63.3% | 1 |
| August 2025 | 31 | 31 | 61.3% | 0 |
| September 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 25 | 24 | 95.8% | 1 |
| November 2025 | 30 | 30 | 96.7% | 0 |
| December 2025 | 18 | 18 | 83.3% | 0 |
| January 2026 | 31 | 31 | 93.6% | 0 |
| February 2026 | 28 | 28 | 89.3% | 0 |
| March 2026 | 31 | 31 | 87.1% | 0 |
| April 2026 | 30 | 30 | 90.0% | 0 |
| May 2026 | 31 | 31 | 96.8% | 0 |
| June 2026 | 30 | 30 | 96.7% | 0 |
| July 2026 | 31 | 31 | 93.6% | 0 |