WN4173
WN4173 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Phoenix to Dallas. Of 381 departures recorded from October 2024 to July 2026, 71.1% left on time, according to the US BTS.
- On-time departures71.1%of 381 flights
- Average delay13.6 min
- July 202617▼ 45.2%vs July 2025
- Cancelled0.3%
- Legs flown under this number20
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 | 7 | 4 | ▼ 42.9% |
| February | 2 | 7 | ▲ 250.0% |
| March | 1 | 28 | ▲ 2,700.0% |
| April | 26 | 19 | ▼ 26.9% |
| May | 36 | 17 | ▼ 52.8% |
| June | 30 | 17 | ▼ 43.3% |
| July | 31 | 17 | ▼ 45.2% |
| August | 30 | – | – |
| September | 30 | – | – |
| October | 1 | – | in progress |
| November | 19 | – | – |
| December | 17 | – | – |
| Year to date (Jan–Jul) | 133 | 109 | ▼ 18.0% |
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 | 57.1% | 75.0% | ▲ 31.3% |
| February | 0.0% | 57.1% | – |
| March | 0.0% | 96.3% | – |
| April | 65.4% | 47.4% | ▼ 27.5% |
| May | 66.7% | 11.8% | ▼ 82.4% |
| June | 86.7% | 41.2% | ▼ 52.5% |
| July | 83.9% | 41.2% | ▼ 50.9% |
| August | 83.3% | – | – |
| September | 93.3% | – | – |
| October | 100.0% | – | in progress |
| November | 89.5% | – | – |
| December | 94.1% | – | – |
| Year-to-date average (Jan–Jul) | 51.4% | 52.8% | ▲ 2.8% |
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 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 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 99.7% 380
- Cancelled 0.3% 1
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 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 DAL Phoenix Sky Harbor International Airport – Dallas Love Field | 1,412 | 5.6 min | 88.5% | 61 |
| SFO SAN San Francisco International Airport – San Diego International Airport | 719 | 14.7 min | 62.1% | 58 |
| RSW STL Southwest Florida International Airport – St. Louis Lambert International Airport | 1,578 | 8.3 min | 87.7% | 57 |
| PVD MCO Rhode Island T. F. Green International Airport – Orlando International Airport | 1,728 | 6.3 min | 90.0% | 40 |
| PHL MDW Philadelphia International Airport – Chicago Midway International Airport | 1,073 | 3.6 min | 93.8% | 33 |
| SAT SAN San Antonio International Airport – San Diego International Airport | 1,814 | 25.5 min | 19.4% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 11 | 11 | 54.6% | 0 |
| November 2024 | 13 | 13 | 69.2% | 0 |
| December 2024 | 18 | 18 | 72.2% | 0 |
| January 2025 | 7 | 7 | 57.1% | 0 |
| February 2025 | 2 | 2 | 0.0% | 0 |
| March 2025 | 1 | 1 | 0.0% | 0 |
| April 2025 | 26 | 26 | 65.4% | 0 |
| May 2025 | 36 | 36 | 66.7% | 0 |
| June 2025 | 30 | 30 | 86.7% | 0 |
| July 2025 | 31 | 31 | 83.9% | 0 |
| August 2025 | 30 | 30 | 83.3% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 19 | 19 | 89.5% | 0 |
| December 2025 | 17 | 17 | 94.1% | 0 |
| January 2026 | 4 | 4 | 75.0% | 0 |
| February 2026 | 7 | 7 | 57.1% | 0 |
| March 2026 | 28 | 27 | 96.3% | 1 |
| April 2026 | 19 | 19 | 47.4% | 0 |
| May 2026 | 17 | 17 | 11.8% | 0 |
| June 2026 | 17 | 17 | 41.2% | 0 |
| July 2026 | 17 | 17 | 41.2% | 0 |