OO4135
OO4135 (SkyWest Airlines) is a multi-stop service on 2 routes, busiest Salt Lake City to Eugene. Of 1,230 departures recorded from October 2024 to July 2026, 92.7% left on time, according to the US BTS.
- On-time departures92.7%of 1,230 flights
- Average delay0.9 min
- July 202631▼ 50.0%vs July 2025
- Cancelled0.0%
- Legs flown under this number2
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 | 62 | 62 | 0.0% |
| February | 56 | 56 | 0.0% |
| March | 62 | 62 | 0.0% |
| April | 60 | 60 | 0.0% |
| May | 62 | 37 | ▼ 40.3% |
| June | 60 | 30 | ▼ 50.0% |
| July | 62 | 31 | ▼ 50.0% |
| August | 62 | – | – |
| September | 60 | – | – |
| October | 62 | – | in progress |
| November | 60 | – | – |
| December | 62 | – | – |
| Year to date (Jan–Jul) | 424 | 338 | ▼ 20.3% |
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 | 91.9% | 88.7% | ▼ 3.5% |
| February | 94.6% | 91.1% | ▼ 3.8% |
| March | 93.6% | 90.3% | ▼ 3.5% |
| April | 95.0% | 91.7% | ▼ 3.5% |
| May | 90.3% | 86.5% | ▼ 4.2% |
| June | 88.3% | 93.3% | ▲ 5.7% |
| July | 95.2% | 96.8% | ▲ 1.7% |
| August | 95.2% | – | – |
| September | 96.7% | – | – |
| October | 98.4% | – | in progress |
| November | 100.0% | – | – |
| December | 90.3% | – | – |
| Year-to-date average (Jan–Jul) | 92.7% | 91.2% | ▼ 1.6% |
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 | 0 | – |
| April | 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) | 0 | 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 100.0% 1,230
- Cancelled 0.0% 0
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 |
|---|---|---|---|---|
| SLC EUG Salt Lake City International Airport – Eugene Airport | 992 | 1.1 min | 93.6% | 658 |
| EUG SLC Eugene Airport – Salt Lake City International Airport | 992 | 0.7 min | 91.6% | 572 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 40 | 90.0% | 0 |
| November 2024 | 60 | 60 | 95.0% | 0 |
| December 2024 | 62 | 62 | 85.5% | 0 |
| January 2025 | 62 | 62 | 91.9% | 0 |
| February 2025 | 56 | 56 | 94.6% | 0 |
| March 2025 | 62 | 62 | 93.6% | 0 |
| April 2025 | 60 | 60 | 95.0% | 0 |
| May 2025 | 62 | 62 | 90.3% | 0 |
| June 2025 | 60 | 60 | 88.3% | 0 |
| July 2025 | 62 | 62 | 95.2% | 0 |
| August 2025 | 62 | 62 | 95.2% | 0 |
| September 2025 | 60 | 60 | 96.7% | 0 |
| October 2025 | 62 | 62 | 98.4% | 0 |
| November 2025 | 60 | 60 | 100.0% | 0 |
| December 2025 | 62 | 62 | 90.3% | 0 |
| January 2026 | 62 | 62 | 88.7% | 0 |
| February 2026 | 56 | 56 | 91.1% | 0 |
| March 2026 | 62 | 62 | 90.3% | 0 |
| April 2026 | 60 | 60 | 91.7% | 0 |
| May 2026 | 37 | 37 | 86.5% | 0 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 31 | 31 | 96.8% | 0 |