OO5635
OO5635 (SkyWest Airlines) is a multi-stop service on 18 routes, busiest Tucson to Chicago. Of 503 departures recorded from October 2024 to July 2026, 79.0% left on time, according to the US BTS.
- On-time departures79.0%of 503 flights
- Average delay17.5 min
- July 20261▼ 91.7%vs July 2025
- Cancelled1.8%
- Legs flown under this number18
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 | 22 | 22 | 0.0% |
| February | 24 | 24 | 0.0% |
| March | 29 | 31 | ▲ 6.9% |
| April | 19 | 29 | ▲ 52.6% |
| May | 31 | 26 | ▼ 16.1% |
| June | 4 | 25 | ▲ 525.0% |
| July | 12 | 1 | ▼ 91.7% |
| August | 15 | – | – |
| September | 28 | – | – |
| October | 27 | – | in progress |
| November | 30 | – | – |
| December | 30 | – | – |
| Year to date (Jan–Jul) | 141 | 158 | ▲ 12.1% |
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 | 81.8% | 90.9% | ▲ 11.1% |
| February | 91.7% | 70.8% | ▼ 22.7% |
| March | 82.8% | 66.7% | ▼ 19.4% |
| April | 88.9% | 89.7% | ▲ 0.9% |
| May | 63.3% | 92.3% | ▲ 45.8% |
| June | 50.0% | 95.8% | ▲ 91.7% |
| July | 41.7% | 100.0% | ▲ 140.0% |
| August | 80.0% | – | – |
| September | 67.9% | – | – |
| October | 81.5% | – | in progress |
| November | 89.7% | – | – |
| December | 65.5% | – | – |
| Year-to-date average (Jan–Jul) | 71.4% | 86.6% | ▲ 21.2% |
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 | 0 | – |
| March | 0 | 4 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 2 | 5 | ▲ 150.0% |
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 98.2% 494
- Cancelled 1.8% 9
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 5, 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 |
|---|---|---|---|---|
| TUS ORD Tucson International Airport – Chicago O'Hare International Airport | 2,309 | 11.5 min | 84.5% | 99 |
| ORD FSD Chicago O'Hare International Airport – Sioux Falls Regional Airport | 743 | 42.8 min | 68.4% | 79 |
| SFO ABQ San Francisco International Airport – Albuquerque International Sunport | 1,439 | 6.4 min | 85.3% | 68 |
| FAR ORD Hector International Airport – Chicago O'Hare International Airport | 895 | 26.2 min | 75.0% | 52 |
| SLC ORD Salt Lake City International Airport – Chicago O'Hare International Airport | 2,006 | -3.4 min | 94.3% | 36 |
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 | 25 | 25 | 72.0% | 0 |
| January 2025 | 22 | 22 | 81.8% | 0 |
| February 2025 | 24 | 24 | 91.7% | 0 |
| March 2025 | 29 | 29 | 82.8% | 0 |
| April 2025 | 19 | 18 | 88.9% | 1 |
| May 2025 | 31 | 30 | 63.3% | 1 |
| June 2025 | 4 | 4 | 50.0% | 0 |
| July 2025 | 12 | 12 | 41.7% | 0 |
| August 2025 | 15 | 15 | 80.0% | 0 |
| September 2025 | 28 | 28 | 67.9% | 0 |
| October 2025 | 27 | 27 | 81.5% | 0 |
| November 2025 | 30 | 29 | 89.7% | 1 |
| December 2025 | 30 | 29 | 65.5% | 1 |
| January 2026 | 22 | 22 | 90.9% | 0 |
| February 2026 | 24 | 24 | 70.8% | 0 |
| March 2026 | 31 | 27 | 66.7% | 4 |
| April 2026 | 29 | 29 | 89.7% | 0 |
| May 2026 | 26 | 26 | 92.3% | 0 |
| June 2026 | 25 | 24 | 95.8% | 1 |
| July 2026 | 1 | 1 | 100.0% | 0 |