OO5135
OO5135 (SkyWest Airlines) is a multi-stop service on 5 routes, busiest Mason City to Chicago. Of 650 departures recorded from October 2024 to July 2026, 71.9% left on time, according to the US BTS.
- On-time departures71.9%of 650 flights
- Average delay30.4 min
- July 202631▼ 50.0%vs July 2025
- Cancelled6.9%
- Legs flown under this number5
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 | 23 | ▼ 25.8% |
| February | 12 | 21 | ▲ 75.0% |
| March | 26 | 22 | ▼ 15.4% |
| April | 30 | 22 | ▼ 26.7% |
| May | 22 | 29 | ▲ 31.8% |
| June | 28 | 54 | ▲ 92.9% |
| July | 62 | 31 | ▼ 50.0% |
| August | 49 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 211 | 202 | ▼ 4.3% |
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 | 80.0% | 55.0% | ▼ 31.3% |
| February | 100.0% | 76.2% | ▼ 23.8% |
| March | 69.2% | 68.4% | ▼ 1.2% |
| April | 70.0% | 84.2% | ▲ 20.3% |
| May | 86.4% | 60.7% | ▼ 29.7% |
| June | 57.1% | 68.1% | ▲ 19.2% |
| July | 63.8% | 78.6% | ▲ 23.2% |
| August | 67.4% | – | – |
| September | 73.3% | – | – |
| October | 64.5% | – | in progress |
| November | 84.6% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Jul) | 75.2% | 70.2% | ▼ 6.7% |
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 | 3 | ▲ 200.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 3 | – |
| April | 0 | 3 | – |
| May | 0 | 1 | – |
| June | 0 | 7 | – |
| July | 4 | 3 | ▼ 25.0% |
| August | 6 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 3 | – | – |
| December | 8 | – | – |
| Year to date (Jan–Jul) | 6 | 20 | ▲ 233.3% |
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 93.1% 605
- Cancelled 6.9% 45
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| MCW ORD Mason City Municipal Airport – Chicago O'Hare International Airport | 463 | 34.3 min | 72.2% | 446 |
| ORD MCW Chicago O'Hare International Airport – Mason City Municipal Airport | 463 | 18.0 min | 70.9% | 140 |
| ORD MGW Chicago O'Hare International Airport – Morgantown Municipal Airport Walter L. (Bill) Hart Field | 720 | 34.3 min | 69.6% | 56 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 85.7% | 0 |
| November 2024 | 29 | 29 | 79.3% | 0 |
| December 2024 | 26 | 24 | 83.3% | 2 |
| January 2025 | 31 | 30 | 80.0% | 1 |
| February 2025 | 12 | 11 | 100.0% | 1 |
| March 2025 | 26 | 26 | 69.2% | 0 |
| April 2025 | 30 | 30 | 70.0% | 0 |
| May 2025 | 22 | 22 | 86.4% | 0 |
| June 2025 | 28 | 28 | 57.1% | 0 |
| July 2025 | 62 | 58 | 63.8% | 4 |
| August 2025 | 49 | 43 | 67.4% | 6 |
| September 2025 | 30 | 30 | 73.3% | 0 |
| October 2025 | 31 | 31 | 64.5% | 0 |
| November 2025 | 29 | 26 | 84.6% | 3 |
| December 2025 | 29 | 21 | 66.7% | 8 |
| January 2026 | 23 | 20 | 55.0% | 3 |
| February 2026 | 21 | 21 | 76.2% | 0 |
| March 2026 | 22 | 19 | 68.4% | 3 |
| April 2026 | 22 | 19 | 84.2% | 3 |
| May 2026 | 29 | 28 | 60.7% | 1 |
| June 2026 | 54 | 47 | 68.1% | 7 |
| July 2026 | 31 | 28 | 78.6% | 3 |