OO4636
OO4636 (SkyWest Airlines) is a multi-stop service on 7 routes, busiest Chicago to South Bend. Of 655 departures recorded from October 2024 to July 2026, 71.6% left on time, according to the US BTS.
- On-time departures71.6%of 655 flights
- Average delay28.6 min
- July 202631▲ 0.0%vs July 2025
- Cancelled3.7%
- Legs flown under this number7
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 | 27 | – | – |
| December | 31 | – | – |
| 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 | 64.5% | 75.9% | ▲ 17.6% |
| February | 60.7% | 71.4% | ▲ 17.7% |
| March | 71.0% | 84.0% | ▲ 18.4% |
| April | 86.7% | 64.3% | ▼ 25.8% |
| May | 83.9% | 60.0% | ▼ 28.5% |
| June | 63.3% | 77.8% | ▲ 22.8% |
| July | 46.7% | 57.1% | ▲ 22.4% |
| August | 62.1% | – | – |
| September | 83.3% | – | – |
| October | 90.3% | – | in progress |
| November | 78.3% | – | – |
| December | 45.2% | – | – |
| Year-to-date average (Jan–Jul) | 68.1% | 70.1% | ▲ 2.9% |
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 | 2 | – |
| February | 0 | 0 | – |
| March | 0 | 6 | – |
| April | 0 | 2 | – |
| May | 0 | 1 | – |
| June | 0 | 3 | – |
| July | 1 | 3 | ▲ 200.0% |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 4 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 17 | ▲ 1,600.0% |
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 96.3% 631
- Cancelled 3.7% 24
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD SBN Chicago O'Hare International Airport – South Bend International Airport | 135 | 31.8 min | 69.3% | 591 |
| ORD ABE Chicago O'Hare International Airport – Lehigh Valley International Airport | 1,050 | 3.9 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 30 | 30 | 83.3% | 0 |
| December 2024 | 31 | 31 | 83.9% | 0 |
| January 2025 | 31 | 31 | 64.5% | 0 |
| February 2025 | 28 | 28 | 60.7% | 0 |
| March 2025 | 31 | 31 | 71.0% | 0 |
| April 2025 | 30 | 30 | 86.7% | 0 |
| May 2025 | 31 | 31 | 83.9% | 0 |
| June 2025 | 30 | 30 | 63.3% | 0 |
| July 2025 | 31 | 30 | 46.7% | 1 |
| August 2025 | 31 | 29 | 62.1% | 2 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 31 | 31 | 90.3% | 0 |
| November 2025 | 27 | 23 | 78.3% | 4 |
| December 2025 | 31 | 31 | 45.2% | 0 |
| January 2026 | 31 | 29 | 75.9% | 2 |
| February 2026 | 28 | 28 | 71.4% | 0 |
| March 2026 | 31 | 25 | 84.0% | 6 |
| April 2026 | 30 | 28 | 64.3% | 2 |
| May 2026 | 31 | 30 | 60.0% | 1 |
| June 2026 | 30 | 27 | 77.8% | 3 |
| July 2026 | 31 | 28 | 57.1% | 3 |