OO4661
OO4661 (SkyWest Airlines) is a multi-stop service on 13 routes, busiest Appleton to Chicago. Of 617 departures recorded from October 2024 to July 2026, 77.5% left on time, according to the US BTS.
- On-time departures77.5%of 617 flights
- Average delay16.9 min
- July 202631▲ 0.0%vs July 2025
- Cancelled2.1%
- 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 | 25 | ▼ 10.7% |
| March | 30 | 31 | ▲ 3.3% |
| April | 30 | 18 | ▼ 40.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 21 | ▼ 30.0% |
| July | 31 | 31 | 0.0% |
| August | 26 | – | – |
| September | 22 | – | – |
| October | 28 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 211 | 188 | ▼ 10.9% |
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 | 80.7% | 90.3% | ▲ 12.0% |
| February | 85.7% | 91.3% | ▲ 6.5% |
| March | 53.3% | 32.1% | ▼ 39.7% |
| April | 86.2% | 52.9% | ▼ 38.6% |
| May | 87.1% | 54.8% | ▼ 37.0% |
| June | 73.3% | 52.4% | ▼ 28.6% |
| July | 80.7% | 48.4% | ▼ 40.0% |
| August | 92.3% | – | – |
| September | 86.4% | – | – |
| October | 89.3% | – | in progress |
| November | 100.0% | – | – |
| December | 93.6% | – | – |
| Year-to-date average (Jan–Jul) | 78.1% | 60.3% | ▼ 22.8% |
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 | 2 | – |
| March | 0 | 3 | – |
| April | 1 | 1 | 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) | 1 | 6 | ▲ 500.0% |
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 97.9% 604
- Cancelled 2.1% 13
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ATW ORD Appleton International Airport – Chicago O'Hare International Airport | 258 | 16.3 min | 81.5% | 309 |
| GEG SFO Spokane International Airport – San Francisco International Airport | 1,180 | 2.1 min | 92.9% | 155 |
| BOI SFO Boise Air Terminal/Gowen Field – San Francisco International Airport | 840 | 32.0 min | 50.5% | 96 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 30 | 28 | 89.3% | 2 |
| December 2024 | 31 | 27 | 88.9% | 4 |
| January 2025 | 31 | 31 | 80.7% | 0 |
| February 2025 | 28 | 28 | 85.7% | 0 |
| March 2025 | 30 | 30 | 53.3% | 0 |
| April 2025 | 30 | 29 | 86.2% | 1 |
| May 2025 | 31 | 31 | 87.1% | 0 |
| June 2025 | 30 | 30 | 73.3% | 0 |
| July 2025 | 31 | 31 | 80.7% | 0 |
| August 2025 | 26 | 26 | 92.3% | 0 |
| September 2025 | 22 | 22 | 86.4% | 0 |
| October 2025 | 28 | 28 | 89.3% | 0 |
| November 2025 | 30 | 30 | 100.0% | 0 |
| December 2025 | 31 | 31 | 93.6% | 0 |
| January 2026 | 31 | 31 | 90.3% | 0 |
| February 2026 | 25 | 23 | 91.3% | 2 |
| March 2026 | 31 | 28 | 32.1% | 3 |
| April 2026 | 18 | 17 | 52.9% | 1 |
| May 2026 | 31 | 31 | 54.8% | 0 |
| June 2026 | 21 | 21 | 52.4% | 0 |
| July 2026 | 31 | 31 | 48.4% | 0 |