OO4638
OO4638 (SkyWest Airlines) is a multi-stop service on 13 routes, busiest Chicago to Colorado Springs. Of 656 departures recorded from October 2024 to July 2026, 72.6% left on time, according to the US BTS.
- On-time departures72.6%of 656 flights
- Average delay21.3 min
- July 202631▲ 0.0%vs July 2025
- Cancelled3.4%
- Legs flown under this number13
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 | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 212 | 212 | 0.0% |
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 | 70.0% | 93.1% | ▲ 33.0% |
| February | 85.2% | 85.2% | 0.0% |
| March | 87.1% | 71.4% | ▼ 18.0% |
| April | 86.2% | 64.3% | ▼ 25.4% |
| May | 71.0% | 75.9% | ▲ 6.9% |
| June | 46.7% | 50.0% | ▲ 7.1% |
| July | 50.0% | 71.4% | ▲ 42.9% |
| August | 79.3% | – | – |
| September | 73.3% | – | – |
| October | 67.7% | – | in progress |
| November | 72.4% | – | – |
| December | 69.0% | – | – |
| Year-to-date average (Jan–Jul) | 70.9% | 73.0% | ▲ 3.1% |
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 | 2 | ▲ 100.0% |
| February | 1 | 1 | 0.0% |
| March | 0 | 3 | – |
| April | 1 | 2 | ▲ 100.0% |
| May | 0 | 2 | – |
| June | 0 | 2 | – |
| July | 1 | 3 | ▲ 200.0% |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 15 | ▲ 275.0% |
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 96.6% 634
- Cancelled 3.4% 22
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD COS Chicago O'Hare International Airport – City of Colorado Springs Municipal Airport | 1,463 | 24.1 min | 68.4% | 454 |
| SFO FAT San Francisco International Airport – Fresno Yosemite International Airport | 253 | 27.0 min | 88.6% | 37 |
| BNA ORD Nashville International Airport – Chicago O'Hare International Airport | 660 | 12.1 min | 80.6% | 37 |
| ABQ SFO Albuquerque International Sunport – San Francisco International Airport | 1,439 | 11.0 min | 71.0% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 30 | 30 | 73.3% | 0 |
| December 2024 | 31 | 31 | 74.2% | 0 |
| January 2025 | 31 | 30 | 70.0% | 1 |
| February 2025 | 28 | 27 | 85.2% | 1 |
| March 2025 | 31 | 31 | 87.1% | 0 |
| April 2025 | 30 | 29 | 86.2% | 1 |
| May 2025 | 31 | 31 | 71.0% | 0 |
| June 2025 | 30 | 30 | 46.7% | 0 |
| July 2025 | 31 | 30 | 50.0% | 1 |
| August 2025 | 31 | 29 | 79.3% | 2 |
| September 2025 | 30 | 30 | 73.3% | 0 |
| October 2025 | 31 | 31 | 67.7% | 0 |
| November 2025 | 30 | 29 | 72.4% | 1 |
| December 2025 | 29 | 29 | 69.0% | 0 |
| January 2026 | 31 | 29 | 93.1% | 2 |
| February 2026 | 28 | 27 | 85.2% | 1 |
| March 2026 | 31 | 28 | 71.4% | 3 |
| April 2026 | 30 | 28 | 64.3% | 2 |
| May 2026 | 31 | 29 | 75.9% | 2 |
| June 2026 | 30 | 28 | 50.0% | 2 |
| July 2026 | 31 | 28 | 71.4% | 3 |