WN4563
WN4563 (Southwest Airlines) is a multi-stop service on 16 routes, busiest Boise to Sacramento. Of 292 departures recorded from October 2024 to July 2026, 68.6% left on time, according to the US BTS.
- On-time departures68.6%of 292 flights
- Average delay18.6 min
- July 202626▲ 116.7%vs July 2025
- Cancelled1.7%
- Legs flown under this number16
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 | 35 | 1 | ▼ 97.1% |
| February | 24 | 2 | ▼ 91.7% |
| March | 8 | 23 | ▲ 187.5% |
| April | 24 | 5 | ▼ 79.2% |
| May | 31 | – | – |
| June | 16 | 23 | ▲ 43.8% |
| July | 12 | 26 | ▲ 116.7% |
| August | 2 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 2 | – | – |
| December | 3 | – | – |
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 | 77.1% | 0.0% | ▼ 100.0% |
| February | 91.7% | 100.0% | ▲ 9.1% |
| March | 62.5% | 50.0% | ▼ 20.0% |
| April | 87.5% | 100.0% | ▲ 14.3% |
| May | 64.5% | – | – |
| June | 64.3% | 21.7% | ▼ 66.2% |
| July | 50.0% | 30.8% | ▼ 38.5% |
| August | 50.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 100.0% | – | – |
| December | 0.0% | – | – |
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 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 2 | 0 | ▼ 100.0% |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | 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 98.3% 287
- Cancelled 1.7% 5
Share of all recorded flights in the period, all legs. · Oct 15, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOI SMF Boise Air Terminal/Gowen Field – Sacramento International Airport | 703 | 1.5 min | 91.6% | 95 |
| BNA DJT Nashville International Airport – President Donald J. Trump International Airport | 1,221 | 16.0 min | 74.1% | 58 |
| BNA GSP Nashville International Airport – Greenville-Spartanburg International Airport | 426 | 50.9 min | 26.5% | 49 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 100.0% | 0 |
| November 2024 | 26 | 26 | 100.0% | 0 |
| December 2024 | 23 | 23 | 95.7% | 0 |
| January 2025 | 35 | 35 | 77.1% | 0 |
| February 2025 | 24 | 24 | 91.7% | 0 |
| March 2025 | 8 | 8 | 62.5% | 0 |
| April 2025 | 24 | 24 | 87.5% | 0 |
| May 2025 | 31 | 31 | 64.5% | 0 |
| June 2025 | 16 | 14 | 64.3% | 2 |
| July 2025 | 12 | 10 | 50.0% | 2 |
| August 2025 | 2 | 2 | 50.0% | 0 |
| November 2025 | 2 | 2 | 100.0% | 0 |
| December 2025 | 3 | 3 | 0.0% | 0 |
| January 2026 | 1 | 1 | 0.0% | 0 |
| February 2026 | 2 | 2 | 100.0% | 0 |
| March 2026 | 23 | 22 | 50.0% | 1 |
| April 2026 | 5 | 5 | 100.0% | 0 |
| June 2026 | 23 | 23 | 21.7% | 0 |
| July 2026 | 26 | 26 | 30.8% | 0 |