WN552
WN552 (Southwest Airlines) is a multi-stop service on 29 routes, busiest St Louis to Los Angeles. Of 711 departures recorded from October 2024 to July 2026, 79.4% left on time, according to the US BTS.
- On-time departures79.4%of 711 flights
- Average delay11.4 min
- July 202612▼ 73.9%vs July 2025
- Cancelled0.6%
- Legs flown under this number29
according to the US BTS · Oct 12, 2024 → Jul 29, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 32 | 31 | ▼ 3.1% |
| February | 25 | 28 | ▲ 12.0% |
| March | 27 | 31 | ▲ 14.8% |
| April | 35 | 30 | ▼ 14.3% |
| May | 40 | 31 | ▼ 22.5% |
| June | 47 | 26 | ▼ 44.7% |
| July | 46 | 12 | ▼ 73.9% |
| August | 32 | – | – |
| September | 26 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 252 | 189 | ▼ 25.0% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 78.1% | 93.3% | ▲ 19.5% |
| February | 88.0% | 92.9% | ▲ 5.5% |
| March | 74.1% | 90.0% | ▲ 21.5% |
| April | 57.1% | 100.0% | ▲ 75.0% |
| May | 45.0% | 96.8% | ▲ 115.0% |
| June | 63.8% | 38.5% | ▼ 39.7% |
| July | 61.4% | 75.0% | ▲ 22.2% |
| August | 81.3% | – | – |
| September | 88.5% | – | – |
| October | 96.8% | – | in progress |
| November | 100.0% | – | – |
| December | 93.6% | – | – |
| Year-to-date average (Jan–Jul) | 66.8% | 83.8% | ▲ 25.4% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.4% 707
- Cancelled 0.6% 4
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL LAX St. Louis Lambert International Airport – Los Angeles International Airport | 2,557 | 10.1 min | 78.8% | 99 |
| AUS DEN Austin Bergstrom International Airport – Denver International Airport | 1,249 | 28.9 min | 66.7% | 81 |
| HNL ITO Daniel K. Inouye International Airport – Hilo International Airport | 349 | -0.5 min | 96.9% | 64 |
| SMF BUR Sacramento International Airport – Hollywood Burbank/Bob Hope Airport | 577 | -1.7 min | 92.9% | 58 |
| RSW BNA Southwest Florida International Airport – Nashville International Airport | 1,164 | -1.7 min | 98.3% | 58 |
| SAN AUS San Diego International Airport – Austin Bergstrom International Airport | 1,871 | 13.4 min | 74.5% | 51 |
| AUS DCA Austin Bergstrom International Airport – Ronald Reagan Washington National Airport | 2,114 | 19.5 min | 59.5% | 44 |
| LAS AUS Harry Reid International Airport – Austin Bergstrom International Airport | 1,752 | 2.4 min | 90.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 76.5% | 0 |
| November 2024 | 46 | 46 | 91.3% | 0 |
| December 2024 | 57 | 57 | 80.7% | 0 |
| January 2025 | 32 | 32 | 78.1% | 0 |
| February 2025 | 25 | 25 | 88.0% | 0 |
| March 2025 | 27 | 27 | 74.1% | 0 |
| April 2025 | 35 | 35 | 57.1% | 0 |
| May 2025 | 40 | 40 | 45.0% | 0 |
| June 2025 | 47 | 47 | 63.8% | 0 |
| July 2025 | 46 | 44 | 61.4% | 2 |
| August 2025 | 32 | 32 | 81.3% | 0 |
| September 2025 | 26 | 26 | 88.5% | 0 |
| October 2025 | 31 | 31 | 96.8% | 0 |
| November 2025 | 30 | 30 | 100.0% | 0 |
| December 2025 | 31 | 31 | 93.6% | 0 |
| January 2026 | 31 | 30 | 93.3% | 1 |
| February 2026 | 28 | 28 | 92.9% | 0 |
| March 2026 | 31 | 30 | 90.0% | 1 |
| April 2026 | 30 | 30 | 100.0% | 0 |
| May 2026 | 31 | 31 | 96.8% | 0 |
| June 2026 | 26 | 26 | 38.5% | 0 |
| July 2026 | 12 | 12 | 75.0% | 0 |