WN4172
WN4172 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Denver to Phoenix. Of 472 departures recorded from October 2024 to July 2026, 74.7% left on time, according to the US BTS.
- On-time departures74.7%of 472 flights
- Average delay12.9 min
- July 202623
- Cancelled1.3%
- Legs flown under this number17
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 9 | 52 | ▲ 477.8% |
| February | 7 | 40 | ▲ 471.4% |
| March | 17 | 29 | ▲ 70.6% |
| April | 13 | 29 | ▲ 123.1% |
| May | 13 | 32 | ▲ 146.2% |
| June | 1 | 22 | ▲ 2,100.0% |
| July | – | 23 | – |
| August | 26 | – | – |
| September | 30 | – | – |
| October | 1 | – | in progress |
| November | 20 | – | – |
| December | 42 | – | – |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 66.7% | 88.0% | ▲ 32.0% |
| February | 100.0% | 89.7% | ▼ 10.3% |
| March | 64.7% | 58.6% | ▼ 9.4% |
| April | 69.2% | 55.2% | ▼ 20.3% |
| May | 61.5% | 53.1% | ▼ 13.7% |
| June | 0.0% | 81.8% | – |
| July | – | 100.0% | – |
| August | 88.5% | – | – |
| September | 90.0% | – | – |
| October | 100.0% | – | in progress |
| November | 90.0% | – | – |
| December | 40.0% | – | – |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
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 98.7% 466
- Cancelled 1.3% 6
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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN PHX Denver International Airport – Phoenix Sky Harbor International Airport | 968 | 17.4 min | 72.9% | 60 |
| SAT PHX San Antonio International Airport – Phoenix Sky Harbor International Airport | 1,354 | 19.0 min | 55.2% | 58 |
| RSW PIT Southwest Florida International Airport – Pittsburgh International Airport | 1,558 | 3.7 min | 89.5% | 57 |
| LGB BNA Long Beach International Airport – Nashville International Airport | 2,867 | -3.7 min | 100.0% | 44 |
| BNA DCA Nashville International Airport – Ronald Reagan Washington National Airport | 903 | 9.2 min | 76.2% | 44 |
| DAL AUS Dallas Love Field – Austin Bergstrom International Airport | 304 | 1.5 min | 92.9% | 42 |
| PVD BWI Rhode Island T. F. Green International Airport – Baltimore/Washington International Thurgood Marshall Airport | 526 | 6.7 min | 83.3% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 25 | 24 | 87.5% | 1 |
| December 2024 | 21 | 21 | 52.4% | 0 |
| January 2025 | 9 | 9 | 66.7% | 0 |
| February 2025 | 7 | 7 | 100.0% | 0 |
| March 2025 | 17 | 17 | 64.7% | 0 |
| April 2025 | 13 | 13 | 69.2% | 0 |
| May 2025 | 13 | 13 | 61.5% | 0 |
| June 2025 | 1 | 1 | 0.0% | 0 |
| August 2025 | 26 | 26 | 88.5% | 0 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 20 | 20 | 90.0% | 0 |
| December 2025 | 42 | 40 | 40.0% | 2 |
| January 2026 | 52 | 50 | 88.0% | 2 |
| February 2026 | 40 | 39 | 89.7% | 1 |
| March 2026 | 29 | 29 | 58.6% | 0 |
| April 2026 | 29 | 29 | 55.2% | 0 |
| May 2026 | 32 | 32 | 53.1% | 0 |
| June 2026 | 22 | 22 | 81.8% | 0 |
| July 2026 | 23 | 23 | 100.0% | 0 |