OO4990
OO4990 (SkyWest Airlines) is a multi-stop service on 21 routes, busiest San Luis Obispo to Phoenix. Of 695 departures recorded from October 2024 to July 2026, 66.6% left on time, according to the US BTS.
- On-time departures66.6%of 695 flights
- Average delay28.2 min
- July 202662▲ 6.9%vs July 2025
- Cancelled4.8%
- Legs flown under this number21
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 | 32 | 5 | ▼ 84.4% |
| February | 44 | 19 | ▼ 56.8% |
| March | 60 | 7 | ▼ 88.3% |
| April | 30 | 4 | ▼ 86.7% |
| May | 58 | 23 | ▼ 60.3% |
| June | 60 | 60 | 0.0% |
| July | 58 | 62 | ▲ 6.9% |
| August | 36 | – | – |
| September | 27 | – | – |
| October | 6 | – | in progress |
| November | 1 | – | – |
| December | 13 | – | – |
| Year to date (Jan–Jul) | 342 | 180 | ▼ 47.4% |
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 | 80.7% | 100.0% | ▲ 24.0% |
| February | 65.9% | 42.1% | ▼ 36.1% |
| March | 68.3% | 25.0% | ▼ 63.4% |
| April | 90.0% | 75.0% | ▼ 16.7% |
| May | 68.5% | 56.5% | ▼ 17.5% |
| June | 43.1% | 61.8% | ▲ 43.4% |
| July | 48.0% | 71.9% | ▲ 49.9% |
| August | 82.9% | – | – |
| September | 74.1% | – | – |
| October | 83.3% | – | in progress |
| November | 100.0% | – | – |
| December | 83.3% | – | – |
| Year-to-date average (Jan–Jul) | 66.4% | 61.8% | ▼ 6.9% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 3 | – |
| April | 0 | 0 | – |
| May | 4 | 0 | ▼ 100.0% |
| June | 2 | 5 | ▲ 150.0% |
| July | 8 | 5 | ▼ 37.5% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 15 | 13 | ▼ 13.3% |
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 95.3% 662
- Cancelled 4.7% 33
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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 62.5% | 0 |
| November 2024 | 53 | 53 | 71.7% | 0 |
| December 2024 | 21 | 18 | 83.3% | 3 |
| January 2025 | 32 | 31 | 80.7% | 1 |
| February 2025 | 44 | 44 | 65.9% | 0 |
| March 2025 | 60 | 60 | 68.3% | 0 |
| April 2025 | 30 | 30 | 90.0% | 0 |
| May 2025 | 58 | 54 | 68.5% | 4 |
| June 2025 | 60 | 58 | 43.1% | 2 |
| July 2025 | 58 | 50 | 48.0% | 8 |
| August 2025 | 36 | 35 | 82.9% | 1 |
| September 2025 | 27 | 27 | 74.1% | 0 |
| October 2025 | 6 | 6 | 83.3% | 0 |
| November 2025 | 1 | 1 | 100.0% | 0 |
| December 2025 | 13 | 12 | 83.3% | 1 |
| January 2026 | 5 | 5 | 100.0% | 0 |
| February 2026 | 19 | 19 | 42.1% | 0 |
| March 2026 | 7 | 4 | 25.0% | 3 |
| April 2026 | 4 | 4 | 75.0% | 0 |
| May 2026 | 23 | 23 | 56.5% | 0 |
| June 2026 | 60 | 55 | 61.8% | 5 |
| July 2026 | 62 | 57 | 71.9% | 5 |