OO4931
OO4931 (SkyWest Airlines) is a multi-stop service on 23 routes, busiest Chicago to Detroit. Of 568 departures recorded from October 2024 to July 2026, 73.0% left on time, according to the US BTS.
- On-time departures73.0%of 568 flights
- Average delay22.1 min
- July 202631▲ 3.3%vs July 2025
- Cancelled2.8%
- Legs flown under this number23
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 | 24 | 7 | ▼ 70.8% |
| February | 25 | 4 | ▼ 84.0% |
| March | 20 | 24 | ▲ 20.0% |
| April | 18 | 30 | ▲ 66.7% |
| May | 30 | 31 | ▲ 3.3% |
| June | 30 | 30 | 0.0% |
| July | 30 | 31 | ▲ 3.3% |
| August | 40 | – | – |
| September | 51 | – | – |
| October | 8 | – | in progress |
| November | 31 | – | – |
| December | 3 | – | – |
| Year to date (Jan–Jul) | 177 | 157 | ▼ 11.3% |
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 | 95.8% | 71.4% | ▼ 25.5% |
| February | 84.0% | 75.0% | ▼ 10.7% |
| March | 95.0% | 83.3% | ▼ 12.3% |
| April | 94.4% | 75.9% | ▼ 19.7% |
| May | 66.7% | 76.7% | ▲ 15.0% |
| June | 43.3% | 44.4% | ▲ 2.6% |
| July | 56.7% | 58.6% | ▲ 3.4% |
| August | 85.0% | – | – |
| September | 68.0% | – | – |
| October | 100.0% | – | in progress |
| November | 80.0% | – | – |
| December | 50.0% | – | – |
| Year-to-date average (Jan–Jul) | 76.6% | 69.3% | ▼ 9.4% |
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 | 0 | – |
| April | 0 | 1 | – |
| May | 0 | 1 | – |
| June | 0 | 3 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 0 | 7 |
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 97.2% 552
- Cancelled 2.8% 16
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
9Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 38 | 38 | 63.2% | 0 |
| November 2024 | 32 | 28 | 78.6% | 4 |
| December 2024 | 31 | 29 | 82.8% | 2 |
| January 2025 | 24 | 24 | 95.8% | 0 |
| February 2025 | 25 | 25 | 84.0% | 0 |
| March 2025 | 20 | 20 | 95.0% | 0 |
| April 2025 | 18 | 18 | 94.4% | 0 |
| May 2025 | 30 | 30 | 66.7% | 0 |
| June 2025 | 30 | 30 | 43.3% | 0 |
| July 2025 | 30 | 30 | 56.7% | 0 |
| August 2025 | 40 | 40 | 85.0% | 0 |
| September 2025 | 51 | 50 | 68.0% | 1 |
| October 2025 | 8 | 8 | 100.0% | 0 |
| November 2025 | 31 | 30 | 80.0% | 1 |
| December 2025 | 3 | 2 | 50.0% | 1 |
| January 2026 | 7 | 7 | 71.4% | 0 |
| February 2026 | 4 | 4 | 75.0% | 0 |
| March 2026 | 24 | 24 | 83.3% | 0 |
| April 2026 | 30 | 29 | 75.9% | 1 |
| May 2026 | 31 | 30 | 76.7% | 1 |
| June 2026 | 30 | 27 | 44.4% | 3 |
| July 2026 | 31 | 29 | 58.6% | 2 |