WN3738
WN3738 (Southwest Airlines) is a multi-stop service on 19 routes, busiest San Francisco to Phoenix. Of 338 departures recorded from October 2024 to July 2026, 83.9% left on time, according to the US BTS.
- On-time departures83.9%of 338 flights
- Average delay6.7 min
- July 202631▲ 63.2%vs July 2025
- Cancelled0.6%
- Legs flown under this number19
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 | 2 | – | – |
| February | 2 | 17 | ▲ 750.0% |
| March | 27 | 29 | ▲ 7.4% |
| April | 7 | 40 | ▲ 471.4% |
| May | – | 44 | – |
| June | 14 | 31 | ▲ 121.4% |
| July | 19 | 31 | ▲ 63.2% |
| August | 2 | – | – |
| September | – | – | – |
| October | 34 | – | in progress |
| November | 5 | – | – |
| December | 2 | – | – |
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 | 100.0% | – | – |
| February | 50.0% | 70.6% | ▲ 41.2% |
| March | 81.5% | 92.9% | ▲ 14.0% |
| April | 28.6% | 92.5% | ▲ 223.8% |
| May | – | 97.7% | – |
| June | 100.0% | 100.0% | 0.0% |
| July | 94.7% | 93.6% | ▼ 1.3% |
| August | 50.0% | – | – |
| September | – | – | – |
| October | 44.1% | – | in progress |
| November | 60.0% | – | – |
| December | 0.0% | – | – |
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 | – | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | – | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | 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 99.4% 336
- Cancelled 0.6% 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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SLC DEN Salt Lake City International Airport – Denver International Airport | 628 | 1.6 min | 96.6% | 58 |
| SFO PHX San Francisco International Airport – Phoenix Sky Harbor International Airport | 1,047 | -3.2 min | 96.5% | 58 |
| SAV MDW Savannah Hilton Head International Airport – Chicago Midway International Airport | 1,221 | 3.3 min | 94.1% | 34 |
| STL BOS St. Louis Lambert International Airport – Boston Logan International Airport | 1,680 | 10.6 min | 69.7% | 33 |
| LBB DEN Lubbock Preston Smith International Airport – Denver International Airport | 734 | 1.2 min | 93.8% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 75.0% | 0 |
| November 2024 | 4 | 4 | 100.0% | 0 |
| December 2024 | 8 | 8 | 100.0% | 0 |
| January 2025 | 2 | 2 | 100.0% | 0 |
| February 2025 | 2 | 2 | 50.0% | 0 |
| March 2025 | 27 | 27 | 81.5% | 0 |
| April 2025 | 7 | 7 | 28.6% | 0 |
| June 2025 | 14 | 14 | 100.0% | 0 |
| July 2025 | 19 | 19 | 94.7% | 0 |
| August 2025 | 2 | 2 | 50.0% | 0 |
| October 2025 | 34 | 34 | 44.1% | 0 |
| November 2025 | 5 | 5 | 60.0% | 0 |
| December 2025 | 2 | 2 | 0.0% | 0 |
| February 2026 | 17 | 17 | 70.6% | 0 |
| March 2026 | 29 | 28 | 92.9% | 1 |
| April 2026 | 40 | 40 | 92.5% | 0 |
| May 2026 | 44 | 43 | 97.7% | 1 |
| June 2026 | 31 | 31 | 100.0% | 0 |
| July 2026 | 31 | 31 | 93.6% | 0 |