OO4127
OO4127 (SkyWest Airlines) is a multi-stop service on 2 routes, busiest Seattle to Boise. Of 1,281 departures recorded from October 2024 to July 2026, 87.7% left on time, according to the US BTS.
- On-time departures87.7%of 1,281 flights
- Average delay3.6 min
- July 202662▲ 0.0%vs July 2025
- Cancelled0.2%
- 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 | 55 | 56 | ▲ 1.8% |
| March | 62 | 62 | 0.0% |
| April | 60 | 60 | 0.0% |
| May | 62 | 37 | ▼ 40.3% |
| June | 60 | 54 | ▼ 10.0% |
| July | 62 | 62 | 0.0% |
| August | 62 | – | – |
| September | 60 | – | – |
| October | 62 | – | in progress |
| November | 59 | – | – |
| December | 62 | – | – |
| Year to date (Jan–Jul) | 423 | 393 | ▼ 7.1% |
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 | 88.7% | 85.5% | ▼ 3.6% |
| February | 76.4% | 91.1% | ▲ 19.3% |
| March | 83.9% | 82.0% | ▼ 2.3% |
| April | 100.0% | 100.0% | 0.0% |
| May | 87.1% | 94.6% | ▲ 8.6% |
| June | 86.7% | 70.4% | ▼ 18.8% |
| July | 82.3% | 79.0% | ▼ 3.9% |
| August | 88.7% | – | – |
| September | 86.7% | – | – |
| October | 93.6% | – | in progress |
| November | 89.5% | – | – |
| December | 98.4% | – | – |
| Year-to-date average (Jan–Jul) | 86.4% | 86.1% | ▼ 0.4% |
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 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
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 99.8% 1,278
- Cancelled 0.2% 3
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 |
|---|---|---|---|---|
| SEA BOI Seattle–Tacoma International Airport – Boise Air Terminal/Gowen Field | 641 | 4.1 min | 87.5% | 658 |
| BOI SEA Boise Air Terminal/Gowen Field – Seattle–Tacoma International Airport | 641 | 3.1 min | 87.9% | 623 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 40 | 87.5% | 0 |
| November 2024 | 58 | 58 | 87.9% | 0 |
| December 2024 | 62 | 62 | 90.3% | 0 |
| January 2025 | 62 | 62 | 88.7% | 0 |
| February 2025 | 55 | 55 | 76.4% | 0 |
| March 2025 | 62 | 62 | 83.9% | 0 |
| April 2025 | 60 | 60 | 100.0% | 0 |
| May 2025 | 62 | 62 | 87.1% | 0 |
| June 2025 | 60 | 60 | 86.7% | 0 |
| July 2025 | 62 | 62 | 82.3% | 0 |
| August 2025 | 62 | 62 | 88.7% | 0 |
| September 2025 | 60 | 60 | 86.7% | 0 |
| October 2025 | 62 | 62 | 93.6% | 0 |
| November 2025 | 59 | 57 | 89.5% | 2 |
| December 2025 | 62 | 62 | 98.4% | 0 |
| January 2026 | 62 | 62 | 85.5% | 0 |
| February 2026 | 56 | 56 | 91.1% | 0 |
| March 2026 | 62 | 61 | 82.0% | 1 |
| April 2026 | 60 | 60 | 100.0% | 0 |
| May 2026 | 37 | 37 | 94.6% | 0 |
| June 2026 | 54 | 54 | 70.4% | 0 |
| July 2026 | 62 | 62 | 79.0% | 0 |