OO5599
OO5599 (SkyWest Airlines) is a multi-stop service on 12 routes, busiest Carlsbad to San Francisco. Of 525 departures recorded from October 2024 to July 2026, 75.2% left on time, according to the US BTS.
- On-time departures75.2%of 525 flights
- Average delay12.8 min
- July 202630▼ 3.2%vs July 2025
- Cancelled1.5%
- Legs flown under this number12
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 | 30 | 31 | ▲ 3.3% |
| February | 28 | 17 | ▼ 39.3% |
| March | 31 | 7 | ▼ 77.4% |
| April | 16 | 30 | ▲ 87.5% |
| May | 17 | 31 | ▲ 82.4% |
| June | 19 | 30 | ▲ 57.9% |
| July | 31 | 30 | ▼ 3.2% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 25 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 172 | 176 | ▲ 2.3% |
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 | 75.9% | 66.7% | ▼ 12.1% |
| February | 89.3% | 76.5% | ▼ 14.4% |
| March | 87.1% | 57.1% | ▼ 34.4% |
| April | 81.3% | 72.4% | ▼ 10.9% |
| May | 94.1% | 54.8% | ▼ 41.7% |
| June | 89.5% | 36.7% | ▼ 59.0% |
| July | 87.1% | 30.0% | ▼ 65.6% |
| August | 96.8% | – | – |
| September | 86.7% | – | – |
| October | 93.6% | – | in progress |
| November | 82.6% | – | – |
| December | 65.5% | – | – |
| Year-to-date average (Jan–Jul) | 86.3% | 56.3% | ▼ 34.8% |
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 | 1 | 4 | ▲ 300.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 1 | – |
| 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) | 1 | 5 | ▲ 400.0% |
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 98.5% 517
- Cancelled 1.5% 8
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| CLD SFO McClellan-Palomar Airport – San Francisco International Airport | 680 | 26.9 min | 49.6% | 124 |
| BIL ORD Billings Logan International Airport – Chicago O'Hare International Airport | 1,702 | 3.0 min | 90.2% | 122 |
| MKE DEN General Mitchell International Airport – Denver International Airport | 1,438 | 10.2 min | 85.4% | 82 |
| OKC ORD OKC Will Rogers World Airport – Chicago O'Hare International Airport | 1,114 | 11.8 min | 77.8% | 65 |
| ORD CHO Chicago O'Hare International Airport – Charlottesville Albemarle Airport | 910 | 1.6 min | 89.8% | 49 |
| ORD MEM Chicago O'Hare International Airport – Frederick W. Smith International Airport | 792 | 18.2 min | 66.7% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 76.9% | 0 |
| November 2024 | 6 | 6 | 100.0% | 0 |
| December 2024 | 12 | 12 | 83.3% | 0 |
| January 2025 | 30 | 29 | 75.9% | 1 |
| February 2025 | 28 | 28 | 89.3% | 0 |
| March 2025 | 31 | 31 | 87.1% | 0 |
| April 2025 | 16 | 16 | 81.3% | 0 |
| May 2025 | 17 | 17 | 94.1% | 0 |
| June 2025 | 19 | 19 | 89.5% | 0 |
| July 2025 | 31 | 31 | 87.1% | 0 |
| August 2025 | 31 | 31 | 96.8% | 0 |
| September 2025 | 30 | 30 | 86.7% | 0 |
| October 2025 | 31 | 31 | 93.6% | 0 |
| November 2025 | 25 | 23 | 82.6% | 2 |
| December 2025 | 29 | 29 | 65.5% | 0 |
| January 2026 | 31 | 27 | 66.7% | 4 |
| February 2026 | 17 | 17 | 76.5% | 0 |
| March 2026 | 7 | 7 | 57.1% | 0 |
| April 2026 | 30 | 29 | 72.4% | 1 |
| May 2026 | 31 | 31 | 54.8% | 0 |
| June 2026 | 30 | 30 | 36.7% | 0 |
| July 2026 | 30 | 30 | 30.0% | 0 |