OO5821
OO5821 (SkyWest Airlines) is a multi-stop service on 11 routes, busiest Chicago to Milwaukee. Of 449 departures recorded from October 2024 to July 2026, 76.9% left on time, according to the US BTS.
- On-time departures76.9%of 449 flights
- Average delay11.6 min
- July 20261▼ 96.8%vs July 2025
- Cancelled2.5%
- Legs flown under this number11
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 | – | 31 | – |
| February | 10 | 27 | ▲ 170.0% |
| March | 16 | 31 | ▲ 93.8% |
| April | 6 | 30 | ▲ 400.0% |
| May | 24 | 31 | ▲ 29.2% |
| June | 30 | 6 | ▼ 80.0% |
| July | 31 | 1 | ▼ 96.8% |
| August | 29 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
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 | – | 63.3% | – |
| February | 60.0% | 77.8% | ▲ 29.6% |
| March | 75.0% | 75.0% | 0.0% |
| April | 100.0% | 63.3% | ▼ 36.7% |
| May | 91.7% | 80.0% | ▼ 12.7% |
| June | 80.0% | 66.7% | ▼ 16.7% |
| July | 83.3% | 0.0% | ▼ 100.0% |
| August | 78.6% | – | – |
| September | 89.7% | – | – |
| October | 76.7% | – | in progress |
| November | 76.9% | – | – |
| December | 61.3% | – | – |
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 | – | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 3 | – |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 1 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 3 | – | – |
| 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 97.6% 438
- Cancelled 2.4% 11
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 9, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD MKE Chicago O'Hare International Airport – General Mitchell International Airport | 108 | 9.3 min | 80.3% | 325 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 15 | 15 | 100.0% | 0 |
| November 2024 | 1 | 1 | 100.0% | 0 |
| December 2024 | 10 | 10 | 80.0% | 0 |
| February 2025 | 10 | 10 | 60.0% | 0 |
| March 2025 | 16 | 16 | 75.0% | 0 |
| April 2025 | 6 | 6 | 100.0% | 0 |
| May 2025 | 24 | 24 | 91.7% | 0 |
| June 2025 | 30 | 30 | 80.0% | 0 |
| July 2025 | 31 | 30 | 83.3% | 1 |
| August 2025 | 29 | 28 | 78.6% | 1 |
| September 2025 | 30 | 29 | 89.7% | 1 |
| October 2025 | 30 | 30 | 76.7% | 0 |
| November 2025 | 29 | 26 | 76.9% | 3 |
| December 2025 | 31 | 31 | 61.3% | 0 |
| January 2026 | 31 | 30 | 63.3% | 1 |
| February 2026 | 27 | 27 | 77.8% | 0 |
| March 2026 | 31 | 28 | 75.0% | 3 |
| April 2026 | 30 | 30 | 63.3% | 0 |
| May 2026 | 31 | 30 | 80.0% | 1 |
| June 2026 | 6 | 6 | 66.7% | 0 |
| July 2026 | 1 | 1 | 0.0% | 0 |