OO5598
OO5598 (SkyWest Airlines) is a multi-stop service on 13 routes, busiest Chicago to Moline. Of 587 departures recorded from October 2024 to July 2026, 81.4% left on time, according to the US BTS.
- On-time departures81.4%of 587 flights
- Average delay14.0 min
- July 202631▲ 55.0%vs July 2025
- Cancelled1.9%
- 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 | 28 | 0.0% |
| March | 31 | 30 | ▼ 3.2% |
| April | 30 | 30 | 0.0% |
| May | 26 | 31 | ▲ 19.2% |
| June | 22 | 29 | ▲ 31.8% |
| July | 20 | 31 | ▲ 55.0% |
| August | 3 | – | – |
| September | 29 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 17 | – | – |
| Year to date (Jan–Jul) | 188 | 210 | ▲ 11.7% |
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 | 86.7% | 83.9% | ▼ 3.2% |
| February | 75.0% | 81.5% | ▲ 8.6% |
| March | 77.4% | 73.3% | ▼ 5.3% |
| April | 73.3% | 90.0% | ▲ 22.7% |
| May | 53.9% | 87.1% | ▲ 61.7% |
| June | 61.9% | 89.7% | ▲ 44.8% |
| July | 68.4% | 82.1% | ▲ 20.1% |
| August | 100.0% | – | – |
| September | 96.6% | – | – |
| October | 96.8% | – | in progress |
| November | 92.9% | – | – |
| December | 70.6% | – | – |
| Year-to-date average (Jan–Jul) | 70.9% | 83.9% | ▲ 18.3% |
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 | 0 | ▼ 100.0% |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 1 | 3 | ▲ 200.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 4 | ▲ 33.3% |
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 98.1% 576
- Cancelled 1.9% 11
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD MLI Chicago O'Hare International Airport – Quad City International Airport | 224 | 17.5 min | 76.1% | 201 |
| TUS DEN Tucson International Airport – Denver International Airport | 1,029 | 15.4 min | 84.4% | 189 |
| MLI ORD Quad City International Airport – Chicago O'Hare International Airport | 224 | 3.3 min | 84.9% | 36 |
| MSN ORD Dane County Regional Truax Field – Chicago O'Hare International Airport | 175 | 14.3 min | 85.7% | 35 |
| SUN DEN Friedman Memorial Airport – Denver International Airport | 895 | -2.6 min | 96.8% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 80.0% | 0 |
| November 2024 | 29 | 29 | 79.3% | 0 |
| December 2024 | 30 | 28 | 89.3% | 2 |
| January 2025 | 31 | 30 | 86.7% | 1 |
| February 2025 | 28 | 28 | 75.0% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 26 | 26 | 53.9% | 0 |
| June 2025 | 22 | 21 | 61.9% | 1 |
| July 2025 | 20 | 19 | 68.4% | 1 |
| August 2025 | 3 | 3 | 100.0% | 0 |
| September 2025 | 29 | 29 | 96.6% | 0 |
| October 2025 | 31 | 31 | 96.8% | 0 |
| November 2025 | 30 | 28 | 92.9% | 2 |
| December 2025 | 17 | 17 | 70.6% | 0 |
| January 2026 | 31 | 31 | 83.9% | 0 |
| February 2026 | 28 | 27 | 81.5% | 1 |
| March 2026 | 30 | 30 | 73.3% | 0 |
| April 2026 | 30 | 30 | 90.0% | 0 |
| May 2026 | 31 | 31 | 87.1% | 0 |
| June 2026 | 29 | 29 | 89.7% | 0 |
| July 2026 | 31 | 28 | 82.1% | 3 |