OO3959
OO3959 (SkyWest Airlines) is a multi-stop service on 6 routes, busiest Seattle to Boise. Of 830 departures recorded from October 2024 to July 2026, 90.4% left on time, according to the US BTS.
- On-time departures90.4%of 830 flights
- Average delay3.5 min
- July 202631
- Cancelled0.1%
- Legs flown under this number6
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 57 | 58 | ▲ 1.8% |
| February | 55 | 56 | ▲ 1.8% |
| March | 62 | 38 | ▼ 38.7% |
| April | 60 | 30 | ▼ 50.0% |
| May | 62 | 31 | ▼ 50.0% |
| June | 14 | 30 | ▲ 114.3% |
| July | – | 31 | – |
| August | 21 | – | – |
| September | 30 | – | – |
| October | 6 | – | in progress |
| November | 14 | – | – |
| December | 29 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 84.2% | 89.7% | ▲ 6.5% |
| February | 92.7% | 89.3% | ▼ 3.7% |
| March | 95.2% | 94.6% | ▼ 0.6% |
| April | 90.0% | 93.3% | ▲ 3.7% |
| May | 96.8% | 80.7% | ▼ 16.7% |
| June | 100.0% | 93.3% | ▼ 6.7% |
| July | – | 83.9% | – |
| August | 90.5% | – | – |
| September | 96.7% | – | – |
| October | 100.0% | – | in progress |
| November | 92.9% | – | – |
| December | 69.0% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 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 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 99.9% 829
- Cancelled 0.1% 1
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 |
|---|---|---|---|---|
| SEA BOI Seattle–Tacoma International Airport – Boise Air Terminal/Gowen Field | 641 | 3.4 min | 90.1% | 393 |
| BOI SEA Boise Air Terminal/Gowen Field – Seattle–Tacoma International Airport | 641 | -1.8 min | 92.7% | 315 |
| LAN DTW Capital Region International Airport – Detroit Metropolitan Wayne County Airport | 119 | 54.8 min | 73.5% | 34 |
| SEA GEG Seattle–Tacoma International Airport – Spokane International Airport | 359 | 10.7 min | 80.7% | 31 |
| MSP BIS Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field – Bismarck Municipal Airport | 620 | 2.3 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 39 | 39 | 89.7% | 0 |
| November 2024 | 58 | 58 | 98.3% | 0 |
| December 2024 | 49 | 49 | 81.6% | 0 |
| January 2025 | 57 | 57 | 84.2% | 0 |
| February 2025 | 55 | 55 | 92.7% | 0 |
| March 2025 | 62 | 62 | 95.2% | 0 |
| April 2025 | 60 | 60 | 90.0% | 0 |
| May 2025 | 62 | 62 | 96.8% | 0 |
| June 2025 | 14 | 14 | 100.0% | 0 |
| August 2025 | 21 | 21 | 90.5% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 6 | 6 | 100.0% | 0 |
| November 2025 | 14 | 14 | 92.9% | 0 |
| December 2025 | 29 | 29 | 69.0% | 0 |
| January 2026 | 58 | 58 | 89.7% | 0 |
| February 2026 | 56 | 56 | 89.3% | 0 |
| March 2026 | 38 | 37 | 94.6% | 1 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 31 | 31 | 80.7% | 0 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 31 | 31 | 83.9% | 0 |