WN423
WN423 (Southwest Airlines) is a multi-stop service on 44 routes, busiest Oakland to Portland. Of 791 departures recorded from October 2024 to July 2026, 70.4% left on time, according to the US BTS.
- On-time departures70.4%of 791 flights
- Average delay20.3 min
- July 202635▲ 2.9%vs July 2025
- Cancelled1.4%
- Legs flown under this number44
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 | 37 | 31 | ▼ 16.2% |
| February | 36 | 28 | ▼ 22.2% |
| March | 34 | 51 | ▲ 50.0% |
| April | 31 | 40 | ▲ 29.0% |
| May | 30 | 35 | ▲ 16.7% |
| June | 34 | 36 | ▲ 5.9% |
| July | 34 | 35 | ▲ 2.9% |
| August | 32 | – | – |
| September | 30 | – | – |
| October | 45 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 236 | 256 | ▲ 8.5% |
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 | 88.6% | 90.3% | ▲ 2.0% |
| February | 86.1% | 92.9% | ▲ 7.8% |
| March | 82.4% | 68.0% | ▼ 17.4% |
| April | 67.7% | 60.0% | ▼ 11.4% |
| May | 63.3% | 21.2% | ▼ 66.5% |
| June | 41.2% | 65.7% | ▲ 59.6% |
| July | 51.5% | 59.4% | ▲ 15.3% |
| August | 68.8% | – | – |
| September | 76.7% | – | – |
| October | 42.2% | – | in progress |
| November | 86.2% | – | – |
| December | 58.1% | – | – |
| Year-to-date average (Jan–Jul) | 68.7% | 65.4% | ▼ 4.9% |
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 | 2 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 2 | – |
| June | 0 | 1 | – |
| July | 1 | 3 | ▲ 200.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 7 | ▲ 133.3% |
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 98.6% 780
- Cancelled 1.4% 11
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 | 27 | 27 | 96.3% | 0 |
| November 2024 | 54 | 54 | 94.4% | 0 |
| December 2024 | 50 | 50 | 86.0% | 0 |
| January 2025 | 37 | 35 | 88.6% | 2 |
| February 2025 | 36 | 36 | 86.1% | 0 |
| March 2025 | 34 | 34 | 82.4% | 0 |
| April 2025 | 31 | 31 | 67.7% | 0 |
| May 2025 | 30 | 30 | 63.3% | 0 |
| June 2025 | 34 | 34 | 41.2% | 0 |
| July 2025 | 34 | 33 | 51.5% | 1 |
| August 2025 | 32 | 32 | 68.8% | 0 |
| September 2025 | 30 | 30 | 76.7% | 0 |
| October 2025 | 45 | 45 | 42.2% | 0 |
| November 2025 | 30 | 29 | 86.2% | 1 |
| December 2025 | 31 | 31 | 58.1% | 0 |
| January 2026 | 31 | 31 | 90.3% | 0 |
| February 2026 | 28 | 28 | 92.9% | 0 |
| March 2026 | 51 | 50 | 68.0% | 1 |
| April 2026 | 40 | 40 | 60.0% | 0 |
| May 2026 | 35 | 33 | 21.2% | 2 |
| June 2026 | 36 | 35 | 65.7% | 1 |
| July 2026 | 35 | 32 | 59.4% | 3 |