WN4137
WN4137 (Southwest Airlines) is a multi-stop service on 11 routes, busiest Phoenix to Sacramento. Of 232 departures recorded from October 2024 to July 2026, 71.1% left on time, according to the US BTS.
- On-time departures71.1%of 232 flights
- Average delay12.7 min
- July 202627▲ 58.8%vs July 2025
- Cancelled0.0%
- Legs flown under this number11
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 5 | – |
| February | 10 | 1 | ▼ 90.0% |
| March | 28 | 12 | ▼ 57.1% |
| April | 7 | 4 | ▼ 42.9% |
| May | 1 | – | – |
| June | 16 | 23 | ▲ 43.8% |
| July | 17 | 27 | ▲ 58.8% |
| August | 3 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 40.0% | – |
| February | 70.0% | 100.0% | ▲ 42.9% |
| March | 71.4% | 75.0% | ▲ 5.0% |
| April | 42.9% | 75.0% | ▲ 75.0% |
| May | 100.0% | – | – |
| June | 62.5% | 100.0% | ▲ 60.0% |
| July | 52.9% | 100.0% | ▲ 88.9% |
| August | 0.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 53.6% | – | – |
| December | 67.7% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 0 | 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 100.0% 232
- Cancelled 0.0% 0
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 SMF Phoenix Sky Harbor International Airport – Sacramento International Airport | 1,040 | 18.1 min | 59.4% | 64 |
| IND PHX Indianapolis International Airport – Phoenix Sky Harbor International Airport | 2,390 | -0.3 min | 100.0% | 50 |
| IND HOU Indianapolis International Airport – William P. Hobby Airport | 1,387 | 18.2 min | 52.8% | 36 |
| BWI CLE Baltimore/Washington International Thurgood Marshall Airport – Cleveland Hopkins International Airport | 505 | 17.4 min | 63.6% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 76.5% | 0 |
| November 2024 | 2 | 2 | 50.0% | 0 |
| February 2025 | 10 | 10 | 70.0% | 0 |
| March 2025 | 28 | 28 | 71.4% | 0 |
| April 2025 | 7 | 7 | 42.9% | 0 |
| May 2025 | 1 | 1 | 100.0% | 0 |
| June 2025 | 16 | 16 | 62.5% | 0 |
| July 2025 | 17 | 17 | 52.9% | 0 |
| August 2025 | 3 | 3 | 0.0% | 0 |
| November 2025 | 28 | 28 | 53.6% | 0 |
| December 2025 | 31 | 31 | 67.7% | 0 |
| January 2026 | 5 | 5 | 40.0% | 0 |
| February 2026 | 1 | 1 | 100.0% | 0 |
| March 2026 | 12 | 12 | 75.0% | 0 |
| April 2026 | 4 | 4 | 75.0% | 0 |
| June 2026 | 23 | 23 | 100.0% | 0 |
| July 2026 | 27 | 27 | 100.0% | 0 |