WN4280
WN4280 (Southwest Airlines) is a multi-stop service on 28 routes, busiest Phoenix to Denver. Of 533 departures recorded from October 2024 to July 2026, 73.0% left on time, according to the US BTS.
- On-time departures73.0%of 533 flights
- Average delay15.3 min
- July 202616▼ 71.9%vs July 2025
- Cancelled0.6%
- Legs flown under this number28
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 | 12 | 8 | ▼ 33.3% |
| February | 17 | 3 | ▼ 82.4% |
| March | 21 | 11 | ▼ 47.6% |
| April | 20 | 19 | ▼ 5.0% |
| May | 23 | 14 | ▼ 39.1% |
| June | 50 | 17 | ▼ 66.0% |
| July | 57 | 16 | ▼ 71.9% |
| August | 21 | – | – |
| September | 17 | – | – |
| October | 38 | – | in progress |
| November | 28 | – | – |
| December | 37 | – | – |
| Year to date (Jan–Jul) | 200 | 88 | ▼ 56.0% |
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 | 58.3% | 50.0% | ▼ 14.3% |
| February | 52.9% | 66.7% | ▲ 25.9% |
| March | 66.7% | 72.7% | ▲ 9.1% |
| April | 75.0% | 79.0% | ▲ 5.3% |
| May | 47.8% | 64.3% | ▲ 34.4% |
| June | 88.0% | 47.1% | ▼ 46.5% |
| July | 89.1% | 56.3% | ▼ 36.9% |
| August | 95.2% | – | – |
| September | 94.1% | – | – |
| October | 71.1% | – | in progress |
| November | 57.1% | – | – |
| December | 67.6% | – | – |
| Year-to-date average (Jan–Jul) | 68.3% | 62.3% | ▼ 8.8% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 0 | ▼ 100.0% |
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 99.4% 530
- Cancelled 0.6% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX DEN Phoenix Sky Harbor International Airport – Denver International Airport | 968 | 13.2 min | 75.0% | 52 |
| PHX SAN Phoenix Sky Harbor International Airport – San Diego International Airport | 489 | 10.8 min | 88.1% | 43 |
| SAV DAL Savannah Hilton Head International Airport – Dallas Love Field | 1,469 | 27.0 min | 60.0% | 40 |
| BNA FLL Nashville International Airport – Fort Lauderdale Hollywood International Airport | 1,278 | 23.1 min | 62.5% | 40 |
| PSP OAK Palm Springs International Airport – Oakland San Francisco Bay Airport | 673 | -1.2 min | 96.8% | 31 |
| LAS SBA Harry Reid International Airport – Santa Barbara Municipal Airport | 464 | 23.7 min | 51.6% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 65.0% | 0 |
| November 2024 | 58 | 57 | 75.4% | 1 |
| December 2024 | 26 | 26 | 88.5% | 0 |
| January 2025 | 12 | 12 | 58.3% | 0 |
| February 2025 | 17 | 17 | 52.9% | 0 |
| March 2025 | 21 | 21 | 66.7% | 0 |
| April 2025 | 20 | 20 | 75.0% | 0 |
| May 2025 | 23 | 23 | 47.8% | 0 |
| June 2025 | 50 | 50 | 88.0% | 0 |
| July 2025 | 57 | 55 | 89.1% | 2 |
| August 2025 | 21 | 21 | 95.2% | 0 |
| September 2025 | 17 | 17 | 94.1% | 0 |
| October 2025 | 38 | 38 | 71.1% | 0 |
| November 2025 | 28 | 28 | 57.1% | 0 |
| December 2025 | 37 | 37 | 67.6% | 0 |
| January 2026 | 8 | 8 | 50.0% | 0 |
| February 2026 | 3 | 3 | 66.7% | 0 |
| March 2026 | 11 | 11 | 72.7% | 0 |
| April 2026 | 19 | 19 | 79.0% | 0 |
| May 2026 | 14 | 14 | 64.3% | 0 |
| June 2026 | 17 | 17 | 47.1% | 0 |
| July 2026 | 16 | 16 | 56.3% | 0 |