WN4436
WN4436 (Southwest Airlines) is a multi-stop service on 13 routes, busiest Tulsa to St Louis. Of 324 departures recorded from October 2024 to July 2026, 76.6% left on time, according to the US BTS.
- On-time departures76.6%of 324 flights
- Average delay13.2 min
- July 202623
- Cancelled0.9%
- Legs flown under this number13
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 24 | 5 | ▼ 79.2% |
| February | 16 | – | – |
| March | 3 | 4 | ▲ 33.3% |
| April | 20 | 15 | ▼ 25.0% |
| May | 14 | 18 | ▲ 28.6% |
| June | 3 | 21 | ▲ 600.0% |
| July | – | 23 | – |
| August | 26 | – | – |
| September | 30 | – | – |
| October | 5 | – | 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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 81.8% | 80.0% | ▼ 2.2% |
| February | 62.5% | – | – |
| March | 100.0% | 0.0% | ▼ 100.0% |
| April | 79.0% | 66.7% | ▼ 15.6% |
| May | 50.0% | 33.3% | ▼ 33.3% |
| June | 33.3% | 81.0% | ▲ 142.9% |
| July | – | 87.0% | – |
| August | 96.2% | – | – |
| September | 100.0% | – | – |
| October | 80.0% | – | in progress |
| November | 78.6% | – | – |
| December | 71.0% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 0 | ▼ 100.0% |
| February | 0 | – | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| 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 99.1% 321
- Cancelled 0.9% 3
Share of all recorded flights in the period, all legs. · Oct 14, 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 |
|---|---|---|---|---|
| TUL STL Tulsa International Airport – St. Louis Lambert International Airport | 563 | -1.3 min | 98.3% | 57 |
| BWI PVD Baltimore/Washington International Thurgood Marshall Airport – Rhode Island T. F. Green International Airport | 526 | 4.4 min | 86.5% | 53 |
| LAX BNA Los Angeles International Airport – Nashville International Airport | 2,886 | 8.2 min | 84.8% | 46 |
| BWI DEN Baltimore/Washington International Thurgood Marshall Airport – Denver International Airport | 2,394 | 5.0 min | 85.7% | 42 |
| BWI BOS Baltimore/Washington International Thurgood Marshall Airport – Boston Logan International Airport | 594 | 35.0 min | 47.1% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 78.6% | 0 |
| November 2024 | 10 | 10 | 90.0% | 0 |
| December 2024 | 14 | 14 | 85.7% | 0 |
| January 2025 | 24 | 22 | 81.8% | 2 |
| February 2025 | 16 | 16 | 62.5% | 0 |
| March 2025 | 3 | 3 | 100.0% | 0 |
| April 2025 | 20 | 19 | 79.0% | 1 |
| May 2025 | 14 | 14 | 50.0% | 0 |
| June 2025 | 3 | 3 | 33.3% | 0 |
| August 2025 | 26 | 26 | 96.2% | 0 |
| September 2025 | 30 | 30 | 100.0% | 0 |
| October 2025 | 5 | 5 | 80.0% | 0 |
| November 2025 | 28 | 28 | 78.6% | 0 |
| December 2025 | 31 | 31 | 71.0% | 0 |
| January 2026 | 5 | 5 | 80.0% | 0 |
| March 2026 | 4 | 4 | 0.0% | 0 |
| April 2026 | 15 | 15 | 66.7% | 0 |
| May 2026 | 18 | 18 | 33.3% | 0 |
| June 2026 | 21 | 21 | 81.0% | 0 |
| July 2026 | 23 | 23 | 87.0% | 0 |