OO3999
OO3999 (SkyWest Airlines) is a multi-stop service on 17 routes, busiest Santa Ana to Seattle. Of 570 departures recorded from October 2024 to July 2026, 79.6% left on time, according to the US BTS.
- On-time departures79.6%of 570 flights
- Average delay10.0 min
- July 202662▲ 588.9%vs July 2025
- Cancelled0.4%
- Legs flown under this number17
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 11 | 4 | ▼ 63.6% |
| February | 8 | 18 | ▲ 125.0% |
| March | 26 | 48 | ▲ 84.6% |
| April | 13 | 60 | ▲ 361.5% |
| May | – | 62 | – |
| June | 40 | 60 | ▲ 50.0% |
| July | 9 | 62 | ▲ 588.9% |
| August | – | – | – |
| September | – | – | – |
| October | 52 | – | in progress |
| November | 20 | – | – |
| December | 36 | – | – |
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 periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 63.6% | 100.0% | ▲ 57.1% |
| February | 87.5% | 83.3% | ▼ 4.8% |
| March | 73.1% | 62.5% | ▼ 14.5% |
| April | 46.2% | 88.3% | ▲ 91.4% |
| May | – | 77.4% | – |
| June | 85.0% | 78.3% | ▼ 7.8% |
| July | 100.0% | 75.0% | ▼ 25.0% |
| August | – | – | – |
| September | – | – | – |
| October | 92.3% | – | in progress |
| November | 100.0% | – | – |
| December | 83.3% | – | – |
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 periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | – | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 2 | – |
| August | – | – | – |
| September | – | – | – |
| 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 99.6% 568
- Cancelled 0.4% 2
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SNA SEA John Wayne Orange County International Airport – Seattle–Tacoma International Airport | 1,576 | 10.5 min | 75.2% | 110 |
| SEA SNA Seattle–Tacoma International Airport – John Wayne Orange County International Airport | 1,576 | 7.5 min | 79.8% | 110 |
| SJC SEA Mineta San Jose International Airport – Seattle–Tacoma International Airport | 1,122 | 1.6 min | 87.3% | 71 |
| SEA SJC Seattle–Tacoma International Airport – Mineta San Jose International Airport | 1,122 | -1.9 min | 94.4% | 54 |
| PIT DTW Pittsburgh International Airport – Detroit Metropolitan Wayne County Airport | 323 | 20.4 min | 72.2% | 36 |
| LAS SAN Harry Reid International Airport – San Diego International Airport | 417 | 29.7 min | 61.1% | 36 |
| DTW PIT Detroit Metropolitan Wayne County Airport – Pittsburgh International Airport | 323 | 17.3 min | 77.8% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 18 | 61.1% | 0 |
| November 2024 | 10 | 10 | 100.0% | 0 |
| December 2024 | 13 | 13 | 69.2% | 0 |
| January 2025 | 11 | 11 | 63.6% | 0 |
| February 2025 | 8 | 8 | 87.5% | 0 |
| March 2025 | 26 | 26 | 73.1% | 0 |
| April 2025 | 13 | 13 | 46.2% | 0 |
| June 2025 | 40 | 40 | 85.0% | 0 |
| July 2025 | 9 | 9 | 100.0% | 0 |
| October 2025 | 52 | 52 | 92.3% | 0 |
| November 2025 | 20 | 20 | 100.0% | 0 |
| December 2025 | 36 | 36 | 83.3% | 0 |
| January 2026 | 4 | 4 | 100.0% | 0 |
| February 2026 | 18 | 18 | 83.3% | 0 |
| March 2026 | 48 | 48 | 62.5% | 0 |
| April 2026 | 60 | 60 | 88.3% | 0 |
| May 2026 | 62 | 62 | 77.4% | 0 |
| June 2026 | 60 | 60 | 78.3% | 0 |
| July 2026 | 62 | 60 | 75.0% | 2 |