OO4121
OO4121 (SkyWest Airlines) is a multi-stop service on 8 routes, busiest Austin to McAllen. Of 679 departures recorded from October 2024 to July 2026, 77.5% left on time, according to the US BTS.
- On-time departures77.5%of 679 flights
- Average delay13.7 min
- July 202631▼ 41.5%vs July 2025
- Cancelled0.6%
- Legs flown under this number8
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 27 | ▼ 12.9% |
| February | 28 | 26 | ▼ 7.1% |
| March | 31 | 7 | ▼ 77.4% |
| April | 30 | 19 | ▼ 36.7% |
| May | 32 | 51 | ▲ 59.4% |
| June | 30 | 35 | ▲ 16.7% |
| July | 53 | 31 | ▼ 41.5% |
| August | 56 | – | – |
| September | 56 | – | – |
| October | 34 | – | in progress |
| November | 28 | – | – |
| December | 19 | – | – |
| Year to date (Jan–Jul) | 235 | 196 | ▼ 16.6% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
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 | 71.0% | 76.9% | ▲ 8.4% |
| February | 78.6% | 88.5% | ▲ 12.6% |
| March | 79.3% | 83.3% | ▲ 5.1% |
| April | 73.3% | 73.7% | ▲ 0.5% |
| May | 53.1% | 80.4% | ▲ 51.3% |
| June | 73.3% | 82.9% | ▲ 13.0% |
| July | 67.9% | 87.1% | ▲ 28.2% |
| August | 69.6% | – | – |
| September | 91.1% | – | – |
| October | 82.4% | – | in progress |
| November | 85.7% | – | – |
| December | 79.0% | – | – |
| Year-to-date average (Jan–Jul) | 70.9% | 81.8% | ▲ 15.3% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 2 | 1 | ▼ 50.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.4% 675
- Cancelled 0.6% 4
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| AUS MFE Austin Bergstrom International Airport – McAllen Miller International Airport | 451 | 14.3 min | 75.8% | 506 |
| MFE AUS McAllen Miller International Airport – Austin Bergstrom International Airport | 451 | 12.0 min | 83.3% | 150 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 76.9% | 0 |
| November 2024 | 21 | 21 | 85.7% | 0 |
| December 2024 | 21 | 21 | 71.4% | 0 |
| January 2025 | 31 | 31 | 71.0% | 0 |
| February 2025 | 28 | 28 | 78.6% | 0 |
| March 2025 | 31 | 29 | 79.3% | 2 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 32 | 32 | 53.1% | 0 |
| June 2025 | 30 | 30 | 73.3% | 0 |
| July 2025 | 53 | 53 | 67.9% | 0 |
| August 2025 | 56 | 56 | 69.6% | 0 |
| September 2025 | 56 | 56 | 91.1% | 0 |
| October 2025 | 34 | 34 | 82.4% | 0 |
| November 2025 | 28 | 28 | 85.7% | 0 |
| December 2025 | 19 | 19 | 79.0% | 0 |
| January 2026 | 27 | 26 | 76.9% | 1 |
| February 2026 | 26 | 26 | 88.5% | 0 |
| March 2026 | 7 | 6 | 83.3% | 1 |
| April 2026 | 19 | 19 | 73.7% | 0 |
| May 2026 | 51 | 51 | 80.4% | 0 |
| June 2026 | 35 | 35 | 82.9% | 0 |
| July 2026 | 31 | 31 | 87.1% | 0 |