OO4631
OO4631 (SkyWest Airlines) is a multi-stop service on 15 routes, busiest Casper to Denver. Of 570 departures recorded from October 2024 to July 2026, 87.0% left on time, according to the US BTS.
- On-time departures87.0%of 570 flights
- Average delay6.6 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.2%
- 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 | 31 | 0.0% |
| February | 12 | 28 | ▲ 133.3% |
| March | 6 | 31 | ▲ 416.7% |
| April | 10 | 30 | ▲ 200.0% |
| May | 16 | 31 | ▲ 93.8% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 136 | 212 | ▲ 55.9% |
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 | 77.4% | 90.3% | ▲ 16.7% |
| February | 83.3% | 85.7% | ▲ 2.9% |
| March | 83.3% | 83.9% | ▲ 0.6% |
| April | 100.0% | 86.7% | ▼ 13.3% |
| May | 87.5% | 93.6% | ▲ 6.9% |
| June | 100.0% | 73.3% | ▼ 26.7% |
| July | 83.9% | 90.3% | ▲ 7.7% |
| August | 80.7% | – | – |
| September | 93.3% | – | – |
| October | 90.3% | – | in progress |
| November | 96.7% | – | – |
| December | 83.9% | – | – |
| Year-to-date average (Jan–Jul) | 87.9% | 86.3% | ▼ 1.9% |
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 | 0 | 0 | – |
| February | 0 | 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 | – | – |
| Year to date (Jan–Jul) | 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 99.8% 569
- Cancelled 0.2% 1
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| CPR DEN Casper-Natrona County International Airport – Denver International Airport | 370 | 8.5 min | 87.4% | 278 |
| MOT DEN Minot International Airport – Denver International Airport | 972 | 1.6 min | 88.9% | 126 |
| DEN SLC Denver International Airport – Salt Lake City International Airport | 628 | 4.1 min | 86.5% | 37 |
| BOI DEN Boise Air Terminal/Gowen Field – Denver International Airport | 1,042 | 9.5 min | 81.1% | 37 |
| DEN ICT Denver International Airport – Wichita Dwight D. Eisenhower National Airport | 674 | 1.4 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 8 | 8 | 100.0% | 0 |
| November 2024 | 30 | 30 | 86.7% | 0 |
| December 2024 | 31 | 30 | 76.7% | 1 |
| January 2025 | 31 | 31 | 77.4% | 0 |
| February 2025 | 12 | 12 | 83.3% | 0 |
| March 2025 | 6 | 6 | 83.3% | 0 |
| April 2025 | 10 | 10 | 100.0% | 0 |
| May 2025 | 16 | 16 | 87.5% | 0 |
| June 2025 | 30 | 30 | 100.0% | 0 |
| July 2025 | 31 | 31 | 83.9% | 0 |
| August 2025 | 31 | 31 | 80.7% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 31 | 31 | 90.3% | 0 |
| November 2025 | 30 | 30 | 96.7% | 0 |
| December 2025 | 31 | 31 | 83.9% | 0 |
| January 2026 | 31 | 31 | 90.3% | 0 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 31 | 31 | 83.9% | 0 |
| April 2026 | 30 | 30 | 86.7% | 0 |
| May 2026 | 31 | 31 | 93.6% | 0 |
| June 2026 | 30 | 30 | 73.3% | 0 |
| July 2026 | 31 | 31 | 90.3% | 0 |