OO4978
OO4978 (SkyWest Airlines) is a multi-stop service on 15 routes, busiest Tucson to Phoenix. Of 602 departures recorded from November 2024 to July 2026, 87.2% left on time, according to the US BTS.
- On-time departures87.2%of 602 flights
- Average delay10.2 min
- July 202628▼ 54.8%vs July 2025
- Cancelled0.5%
- Legs flown under this number15
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 | 2 | ▼ 93.5% |
| February | 28 | 3 | ▼ 89.3% |
| March | 31 | 1 | ▼ 96.8% |
| April | 30 | 24 | ▼ 20.0% |
| May | 12 | 32 | ▲ 166.7% |
| June | 53 | 50 | ▼ 5.7% |
| July | 62 | 28 | ▼ 54.8% |
| August | 35 | – | – |
| September | 56 | – | – |
| October | 60 | – | in progress |
| November | 3 | – | – |
| December | 16 | – | – |
| Year to date (Jan–Jul) | 247 | 140 | ▼ 43.3% |
according to the US BTS · November 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 | 90.3% | 0.0% | ▼ 100.0% |
| February | 100.0% | 66.7% | ▼ 33.3% |
| March | 80.7% | 0.0% | ▼ 100.0% |
| April | 96.7% | 87.5% | ▼ 9.5% |
| May | 91.7% | 81.3% | ▼ 11.4% |
| June | 90.6% | 84.0% | ▼ 7.3% |
| July | 91.9% | 92.9% | ▲ 1.0% |
| August | 94.3% | – | – |
| September | 90.7% | – | – |
| October | 85.0% | – | in progress |
| November | 66.7% | – | – |
| December | 40.0% | – | – |
| Year-to-date average (Jan–Jul) | 91.7% | 58.9% | ▼ 35.8% |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 2 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 0 | 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.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.5% 599
- Cancelled 0.5% 3
Share of all recorded flights in the period, all legs. · Nov 7, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| TUS PHX Tucson International Airport – Phoenix Sky Harbor International Airport | 178 | 7.3 min | 91.5% | 188 |
| DFW TUL Dallas Fort Worth International Airport – Tulsa International Airport | 382 | 0.5 min | 91.1% | 147 |
| TUL DFW Tulsa International Airport – Dallas Fort Worth International Airport | 382 | 3.9 min | 89.1% | 120 |
| PHX ELP Phoenix Sky Harbor International Airport – El Paso International Airport | 557 | 5.2 min | 86.7% | 45 |
| ELP PHX El Paso International Airport – Phoenix Sky Harbor International Airport | 557 | 21.1 min | 84.4% | 45 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 16 | 16 | 68.8% | 0 |
| December 2024 | 29 | 29 | 93.1% | 0 |
| January 2025 | 31 | 31 | 90.3% | 0 |
| February 2025 | 28 | 28 | 100.0% | 0 |
| March 2025 | 31 | 31 | 80.7% | 0 |
| April 2025 | 30 | 30 | 96.7% | 0 |
| May 2025 | 12 | 12 | 91.7% | 0 |
| June 2025 | 53 | 53 | 90.6% | 0 |
| July 2025 | 62 | 62 | 91.9% | 0 |
| August 2025 | 35 | 35 | 94.3% | 0 |
| September 2025 | 56 | 54 | 90.7% | 2 |
| October 2025 | 60 | 60 | 85.0% | 0 |
| November 2025 | 3 | 3 | 66.7% | 0 |
| December 2025 | 16 | 15 | 40.0% | 1 |
| January 2026 | 2 | 2 | 0.0% | 0 |
| February 2026 | 3 | 3 | 66.7% | 0 |
| March 2026 | 1 | 1 | 0.0% | 0 |
| April 2026 | 24 | 24 | 87.5% | 0 |
| May 2026 | 32 | 32 | 81.3% | 0 |
| June 2026 | 50 | 50 | 84.0% | 0 |
| July 2026 | 28 | 28 | 92.9% | 0 |