WN1559
WN1559 (Southwest Airlines) is a multi-stop service on 40 routes, busiest Ontario to Sacramento. Of 755 departures recorded from October 2024 to July 2026, 70.9% left on time, according to the US BTS.
- On-time departures70.9%of 755 flights
- Average delay13.6 min
- July 202631▲ 55.0%vs July 2025
- Cancelled0.7%
- Legs flown under this number40
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 | 29 | 33 | ▲ 13.8% |
| February | 28 | 28 | 0.0% |
| March | 31 | 46 | ▲ 48.4% |
| April | 30 | 46 | ▲ 53.3% |
| May | 31 | 48 | ▲ 54.8% |
| June | 24 | 31 | ▲ 29.2% |
| July | 20 | 31 | ▲ 55.0% |
| August | 52 | – | – |
| September | 56 | – | – |
| October | 60 | – | in progress |
| November | 36 | – | – |
| December | 35 | – | – |
| Year to date (Jan–Jul) | 193 | 263 | ▲ 36.3% |
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 | 92.9% | 75.0% | ▼ 19.2% |
| February | 100.0% | 82.1% | ▼ 17.9% |
| March | 90.3% | 32.6% | ▼ 63.9% |
| April | 70.0% | 69.6% | ▼ 0.6% |
| May | 45.2% | 77.1% | ▲ 70.7% |
| June | 69.6% | 83.9% | ▲ 20.6% |
| July | 75.0% | 87.1% | ▲ 16.1% |
| August | 67.3% | – | – |
| September | 46.4% | – | – |
| October | 65.5% | – | in progress |
| November | 88.9% | – | – |
| December | 65.7% | – | – |
| Year-to-date average (Jan–Jul) | 77.6% | 72.5% | ▼ 6.5% |
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 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 2 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 1 | ▼ 50.0% |
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 99.3% 750
- Cancelled 0.7% 5
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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 70.0% | 0 |
| November 2024 | 14 | 14 | 92.9% | 0 |
| December 2024 | 26 | 26 | 73.1% | 0 |
| January 2025 | 29 | 28 | 92.9% | 1 |
| February 2025 | 28 | 28 | 100.0% | 0 |
| March 2025 | 31 | 31 | 90.3% | 0 |
| April 2025 | 30 | 30 | 70.0% | 0 |
| May 2025 | 31 | 31 | 45.2% | 0 |
| June 2025 | 24 | 23 | 69.6% | 1 |
| July 2025 | 20 | 20 | 75.0% | 0 |
| August 2025 | 52 | 52 | 67.3% | 0 |
| September 2025 | 56 | 56 | 46.4% | 0 |
| October 2025 | 60 | 58 | 65.5% | 2 |
| November 2025 | 36 | 36 | 88.9% | 0 |
| December 2025 | 35 | 35 | 65.7% | 0 |
| January 2026 | 33 | 32 | 75.0% | 1 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 46 | 46 | 32.6% | 0 |
| April 2026 | 46 | 46 | 69.6% | 0 |
| May 2026 | 48 | 48 | 77.1% | 0 |
| June 2026 | 31 | 31 | 83.9% | 0 |
| July 2026 | 31 | 31 | 87.1% | 0 |