WN3543
WN3543 (Southwest Airlines) is a multi-stop service on 21 routes, busiest St Louis to Fort Myers. Of 545 departures recorded from October 2024 to July 2026, 70.7% left on time, according to the US BTS.
- On-time departures70.7%of 545 flights
- Average delay15.7 min
- July 202618▼ 48.6%vs July 2025
- Cancelled1.1%
- Legs flown under this number21
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 | 31 | 5 | ▼ 83.9% |
| February | 28 | 3 | ▼ 89.3% |
| March | 33 | 39 | ▲ 18.2% |
| April | 30 | 33 | ▲ 10.0% |
| May | 31 | 30 | ▼ 3.2% |
| June | 34 | 30 | ▼ 11.8% |
| July | 35 | 18 | ▼ 48.6% |
| August | 13 | – | – |
| September | 8 | – | – |
| October | 18 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 222 | 158 | ▼ 28.8% |
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 | 80.0% | 100.0% | ▲ 25.0% |
| February | 82.1% | 100.0% | ▲ 21.7% |
| March | 60.6% | 46.2% | ▼ 23.9% |
| April | 70.0% | 69.7% | ▼ 0.4% |
| May | 71.0% | 66.7% | ▼ 6.1% |
| June | 79.4% | 46.7% | ▼ 41.2% |
| July | 94.1% | 43.8% | ▼ 53.5% |
| August | 84.6% | – | – |
| September | 100.0% | – | – |
| October | 11.8% | – | in progress |
| November | 85.7% | – | – |
| December | 73.3% | – | – |
| Year-to-date average (Jan–Jul) | 76.8% | 67.6% | ▼ 12.0% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
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 98.9% 539
- Cancelled 1.1% 6
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 29, 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 |
|---|---|---|---|---|
| STL RSW St. Louis Lambert International Airport – Southwest Florida International Airport | 1,578 | 8.4 min | 79.3% | 122 |
| MCI RSW Kansas City International Airport – Southwest Florida International Airport | 1,861 | 11.2 min | 81.0% | 64 |
| OAK LAX Oakland San Francisco Bay Airport – Los Angeles International Airport | 543 | 4.7 min | 86.7% | 61 |
| BNA RSW Nashville International Airport – Southwest Florida International Airport | 1,164 | 16.3 min | 72.4% | 58 |
| RDU MDW Raleigh-Durham International Airport – Chicago Midway International Airport | 1,016 | 10.3 min | 70.2% | 57 |
| DEN LAS Denver International Airport – Harry Reid International Airport | 1,009 | 28.0 min | 42.4% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 100.0% | 0 |
| November 2024 | 28 | 28 | 75.0% | 0 |
| December 2024 | 30 | 30 | 83.3% | 0 |
| January 2025 | 31 | 30 | 80.0% | 1 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 33 | 33 | 60.6% | 0 |
| April 2025 | 30 | 30 | 70.0% | 0 |
| May 2025 | 31 | 31 | 71.0% | 0 |
| June 2025 | 34 | 34 | 79.4% | 0 |
| July 2025 | 35 | 34 | 94.1% | 1 |
| August 2025 | 13 | 13 | 84.6% | 0 |
| September 2025 | 8 | 8 | 100.0% | 0 |
| October 2025 | 18 | 17 | 11.8% | 1 |
| November 2025 | 28 | 28 | 85.7% | 0 |
| December 2025 | 31 | 30 | 73.3% | 1 |
| January 2026 | 5 | 5 | 100.0% | 0 |
| February 2026 | 3 | 3 | 100.0% | 0 |
| March 2026 | 39 | 39 | 46.2% | 0 |
| April 2026 | 33 | 33 | 69.7% | 0 |
| May 2026 | 30 | 30 | 66.7% | 0 |
| June 2026 | 30 | 30 | 46.7% | 0 |
| July 2026 | 18 | 16 | 43.8% | 2 |