OO4921
OO4921 (SkyWest Airlines) is a multi-stop service on 16 routes, busiest Phoenix to Salt Lake City. Of 640 departures recorded from October 2024 to July 2026, 77.2% left on time, according to the US BTS.
- On-time departures77.2%of 640 flights
- Average delay15.1 min
- July 202631▲ 3.3%vs July 2025
- Cancelled1.9%
- Legs flown under this number16
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 | 12 | 16 | ▲ 33.3% |
| February | 14 | 8 | ▼ 42.9% |
| March | 28 | 48 | ▲ 71.4% |
| April | 30 | 32 | ▲ 6.7% |
| May | 31 | 27 | ▼ 12.9% |
| June | 30 | 30 | 0.0% |
| July | 30 | 31 | ▲ 3.3% |
| August | 56 | – | – |
| September | 38 | – | – |
| October | 48 | – | in progress |
| November | 29 | – | – |
| December | 30 | – | – |
| Year to date (Jan–Jul) | 175 | 192 | ▲ 9.7% |
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 | 100.0% | 81.3% | ▼ 18.8% |
| February | 85.7% | 75.0% | ▼ 12.5% |
| March | 57.1% | 57.8% | ▲ 1.1% |
| April | 83.3% | 51.6% | ▼ 38.1% |
| May | 83.9% | 77.8% | ▼ 7.3% |
| June | 86.7% | 83.3% | ▼ 3.9% |
| July | 76.7% | 58.1% | ▼ 24.3% |
| August | 87.5% | – | – |
| September | 86.8% | – | – |
| October | 72.9% | – | in progress |
| November | 62.5% | – | – |
| December | 96.4% | – | – |
| Year-to-date average (Jan–Jul) | 81.9% | 69.3% | ▼ 15.4% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 3 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 5 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 0 | 4 |
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 98.1% 628
- Cancelled 1.9% 12
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX SLC Phoenix Sky Harbor International Airport – Salt Lake City International Airport | 818 | 15.0 min | 77.8% | 306 |
| PHX BOI Phoenix Sky Harbor International Airport – Boise Air Terminal/Gowen Field | 1,184 | 4.5 min | 86.6% | 67 |
| BOI PHX Boise Air Terminal/Gowen Field – Phoenix Sky Harbor International Airport | 1,184 | 16.1 min | 76.4% | 55 |
| ORD DAY Chicago O'Hare International Airport – James M. Cox Dayton International Airport | 386 | 41.9 min | 51.7% | 30 |
| FNT ORD Bishop International Airport – Chicago O'Hare International Airport | 359 | 28.7 min | 62.5% | 30 |
| FLG DFW Flagstaff Pulliam Airport – Dallas Fort Worth International Airport | 1,370 | 1.6 min | 86.7% | 30 |
| DAY ORD James M. Cox Dayton International Airport – Chicago O'Hare International Airport | 386 | 50.1 min | 51.9% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 30 | 29 | 82.8% | 1 |
| December 2024 | 22 | 22 | 90.9% | 0 |
| January 2025 | 12 | 12 | 100.0% | 0 |
| February 2025 | 14 | 14 | 85.7% | 0 |
| March 2025 | 28 | 28 | 57.1% | 0 |
| April 2025 | 30 | 30 | 83.3% | 0 |
| May 2025 | 31 | 31 | 83.9% | 0 |
| June 2025 | 30 | 30 | 86.7% | 0 |
| July 2025 | 30 | 30 | 76.7% | 0 |
| August 2025 | 56 | 56 | 87.5% | 0 |
| September 2025 | 38 | 38 | 86.8% | 0 |
| October 2025 | 48 | 48 | 72.9% | 0 |
| November 2025 | 29 | 24 | 62.5% | 5 |
| December 2025 | 30 | 28 | 96.4% | 2 |
| January 2026 | 16 | 16 | 81.3% | 0 |
| February 2026 | 8 | 8 | 75.0% | 0 |
| March 2026 | 48 | 45 | 57.8% | 3 |
| April 2026 | 32 | 31 | 51.6% | 1 |
| May 2026 | 27 | 27 | 77.8% | 0 |
| June 2026 | 30 | 30 | 83.3% | 0 |
| July 2026 | 31 | 31 | 58.1% | 0 |