OO5539
OO5539 (SkyWest Airlines) is a multi-stop service on 10 routes, busiest Arcata to San Francisco. Of 569 departures recorded from October 2024 to July 2026, 81.4% left on time, according to the US BTS.
- On-time departures81.4%of 569 flights
- Average delay12.0 min
- July 202631▲ 0.0%vs July 2025
- Cancelled2.6%
- Legs flown under this number10
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 | 25 | 31 | ▲ 24.0% |
| February | 22 | 24 | ▲ 9.1% |
| March | 22 | 22 | 0.0% |
| April | 30 | 21 | ▼ 30.0% |
| May | 31 | 26 | ▼ 16.1% |
| June | 30 | 7 | ▼ 76.7% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 191 | 162 | ▼ 15.2% |
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 | 92.0% | 82.8% | ▼ 10.0% |
| February | 86.4% | 75.0% | ▼ 13.2% |
| March | 81.0% | 95.5% | ▲ 17.9% |
| April | 73.3% | 68.4% | ▼ 6.7% |
| May | 83.9% | 73.1% | ▼ 12.9% |
| June | 93.3% | 100.0% | ▲ 7.1% |
| July | 77.4% | 61.5% | ▼ 20.5% |
| August | 90.3% | – | – |
| September | 83.3% | – | – |
| October | 80.7% | – | in progress |
| November | 81.5% | – | – |
| December | 79.3% | – | – |
| Year-to-date average (Jan–Jul) | 83.9% | 79.5% | ▼ 5.3% |
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 | 2 | – |
| February | 0 | 0 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 2 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 5 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 1 | 9 | ▲ 800.0% |
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 97.4% 554
- Cancelled 2.6% 15
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ACV SFO California Redwood Coast-Humboldt County Airport – San Francisco International Airport | 402 | 14.0 min | 81.4% | 385 |
| SFO PSC San Francisco International Airport – Tri Cities Airport | 998 | 4.0 min | 84.0% | 51 |
| SBA LAX Santa Barbara Municipal Airport – Los Angeles International Airport | 142 | 9.2 min | 84.8% | 46 |
| ORD MLI Chicago O'Hare International Airport – Quad City International Airport | 224 | 19.7 min | 68.8% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 80.0% | 0 |
| November 2024 | 29 | 28 | 85.7% | 1 |
| December 2024 | 15 | 15 | 73.3% | 0 |
| January 2025 | 25 | 25 | 92.0% | 0 |
| February 2025 | 22 | 22 | 86.4% | 0 |
| March 2025 | 22 | 21 | 81.0% | 1 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 31 | 31 | 83.9% | 0 |
| June 2025 | 30 | 30 | 93.3% | 0 |
| July 2025 | 31 | 31 | 77.4% | 0 |
| August 2025 | 31 | 31 | 90.3% | 0 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 31 | 31 | 80.7% | 0 |
| November 2025 | 29 | 27 | 81.5% | 2 |
| December 2025 | 31 | 29 | 79.3% | 2 |
| January 2026 | 31 | 29 | 82.8% | 2 |
| February 2026 | 24 | 24 | 75.0% | 0 |
| March 2026 | 22 | 22 | 95.5% | 0 |
| April 2026 | 21 | 19 | 68.4% | 2 |
| May 2026 | 26 | 26 | 73.1% | 0 |
| June 2026 | 7 | 7 | 100.0% | 0 |
| July 2026 | 31 | 26 | 61.5% | 5 |