OO4021
OO4021 (SkyWest Airlines) is a multi-stop service on 20 routes, busiest Salt Lake City to Boise. Of 564 departures recorded from October 2024 to July 2026, 85.2% left on time, according to the US BTS.
- On-time departures85.2%of 564 flights
- Average delay9.4 min
- July 202610▼ 56.5%vs July 2025
- Cancelled0.5%
- Legs flown under this number20
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 27 | ▲ 2,600.0% |
| February | – | 10 | – |
| March | 23 | 6 | ▼ 73.9% |
| April | 47 | 22 | ▼ 53.2% |
| May | 37 | 55 | ▲ 48.6% |
| June | 30 | 54 | ▲ 80.0% |
| July | 23 | 10 | ▼ 56.5% |
| August | 26 | – | – |
| September | 26 | – | – |
| October | 30 | – | in progress |
| November | 27 | – | – |
| December | 19 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 50.0% | ▼ 50.0% |
| February | – | 100.0% | – |
| March | 87.0% | 33.3% | ▼ 61.7% |
| April | 100.0% | 72.7% | ▼ 27.3% |
| May | 78.4% | 87.3% | ▲ 11.3% |
| June | 83.3% | 98.2% | ▲ 17.8% |
| July | 82.6% | 80.0% | ▼ 3.2% |
| August | 88.5% | – | – |
| September | 80.8% | – | – |
| October | 100.0% | – | in progress |
| November | 85.2% | – | – |
| December | 89.5% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 3 | – |
| February | – | 0 | – |
| March | 0 | 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 | – | – |
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 99.5% 561
- Cancelled 0.5% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 6, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SLC BOI Salt Lake City International Airport – Boise Air Terminal/Gowen Field | 466 | 3.1 min | 89.4% | 169 |
| ATL CRW Hartsfield Jackson Atlanta International Airport – Yeager Airport | 585 | 23.7 min | 67.2% | 64 |
| SMF LAX Sacramento International Airport – Los Angeles International Airport | 600 | -5.3 min | 91.7% | 36 |
| LGA OMA LaGuardia Airport – Eppley Airfield | 1,843 | 37.4 min | 75.0% | 32 |
| DTW BUF Detroit Metropolitan Wayne County Airport – Buffalo Niagara International Airport | 387 | 2.8 min | 90.3% | 31 |
| BUF DTW Buffalo Niagara International Airport – Detroit Metropolitan Wayne County Airport | 387 | 10.7 min | 93.6% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 39 | 39 | 87.2% | 0 |
| November 2024 | 34 | 34 | 88.2% | 0 |
| December 2024 | 18 | 18 | 55.6% | 0 |
| January 2025 | 1 | 1 | 100.0% | 0 |
| March 2025 | 23 | 23 | 87.0% | 0 |
| April 2025 | 47 | 47 | 100.0% | 0 |
| May 2025 | 37 | 37 | 78.4% | 0 |
| June 2025 | 30 | 30 | 83.3% | 0 |
| July 2025 | 23 | 23 | 82.6% | 0 |
| August 2025 | 26 | 26 | 88.5% | 0 |
| September 2025 | 26 | 26 | 80.8% | 0 |
| October 2025 | 30 | 30 | 100.0% | 0 |
| November 2025 | 27 | 27 | 85.2% | 0 |
| December 2025 | 19 | 19 | 89.5% | 0 |
| January 2026 | 27 | 24 | 50.0% | 3 |
| February 2026 | 10 | 10 | 100.0% | 0 |
| March 2026 | 6 | 6 | 33.3% | 0 |
| April 2026 | 22 | 22 | 72.7% | 0 |
| May 2026 | 55 | 55 | 87.3% | 0 |
| June 2026 | 54 | 54 | 98.2% | 0 |
| July 2026 | 10 | 10 | 80.0% | 0 |