WN4202
WN4202 (Southwest Airlines) is a multi-stop service on 21 routes, busiest Phoenix to Boise. Of 288 departures recorded from October 2024 to July 2026, 72.4% left on time, according to the US BTS.
- On-time departures72.4%of 288 flights
- Average delay14.3 min
- July 202618▼ 33.3%vs July 2025
- Cancelled0.7%
- Legs flown under this number21
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 | 7 | 6 | ▼ 14.3% |
| February | 10 | 12 | ▲ 20.0% |
| March | 28 | 24 | ▼ 14.3% |
| April | 7 | 10 | ▲ 42.9% |
| May | – | 11 | – |
| June | 22 | 16 | ▼ 27.3% |
| July | 27 | 18 | ▼ 33.3% |
| August | 3 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 3 | – | – |
| December | 9 | – | – |
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 | 42.9% | 50.0% | ▲ 16.7% |
| February | 50.0% | 58.3% | ▲ 16.7% |
| March | 74.1% | 91.7% | ▲ 23.8% |
| April | 42.9% | 80.0% | ▲ 86.7% |
| May | – | 72.7% | – |
| June | 72.7% | 100.0% | ▲ 37.5% |
| July | 85.2% | 88.9% | ▲ 4.3% |
| August | 66.7% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 100.0% | – | – |
| December | 50.0% | – | – |
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 | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | – | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
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% 286
- Cancelled 0.7% 2
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 |
|---|---|---|---|---|
| PHX BOI Phoenix Sky Harbor International Airport – Boise Air Terminal/Gowen Field | 1,184 | 12.8 min | 78.9% | 52 |
| PHL MDW Philadelphia International Airport – Chicago Midway International Airport | 1,073 | 8.5 min | 94.1% | 34 |
| LAS PHX Harry Reid International Airport – Phoenix Sky Harbor International Airport | 411 | 18.6 min | 61.8% | 34 |
| DCA BNA Ronald Reagan Washington National Airport – Nashville International Airport | 903 | 22.1 min | 68.8% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 23 | 23 | 87.0% | 0 |
| November 2024 | 26 | 26 | 73.1% | 0 |
| December 2024 | 26 | 26 | 34.6% | 0 |
| January 2025 | 7 | 7 | 42.9% | 0 |
| February 2025 | 10 | 10 | 50.0% | 0 |
| March 2025 | 28 | 27 | 74.1% | 1 |
| April 2025 | 7 | 7 | 42.9% | 0 |
| June 2025 | 22 | 22 | 72.7% | 0 |
| July 2025 | 27 | 27 | 85.2% | 0 |
| August 2025 | 3 | 3 | 66.7% | 0 |
| November 2025 | 3 | 3 | 100.0% | 0 |
| December 2025 | 9 | 8 | 50.0% | 1 |
| January 2026 | 6 | 6 | 50.0% | 0 |
| February 2026 | 12 | 12 | 58.3% | 0 |
| March 2026 | 24 | 24 | 91.7% | 0 |
| April 2026 | 10 | 10 | 80.0% | 0 |
| May 2026 | 11 | 11 | 72.7% | 0 |
| June 2026 | 16 | 16 | 100.0% | 0 |
| July 2026 | 18 | 18 | 88.9% | 0 |