WN3523
WN3523 (Southwest Airlines) is a multi-stop service on 24 routes, busiest Denver to St Louis. Of 388 departures recorded from October 2024 to July 2026, 74.0% left on time, according to the US BTS.
- On-time departures74.0%of 388 flights
- Average delay14.4 min
- July 20269▲ 50.0%vs July 2025
- Cancelled2.1%
- Legs flown under this number24
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 | 7 | 19 | ▲ 171.4% |
| February | 10 | 19 | ▲ 90.0% |
| March | 33 | 3 | ▼ 90.9% |
| April | 32 | 32 | 0.0% |
| May | 31 | 38 | ▲ 22.6% |
| June | 9 | 12 | ▲ 33.3% |
| July | 6 | 9 | ▲ 50.0% |
| August | 10 | – | – |
| September | 8 | – | – |
| October | 12 | – | in progress |
| November | 32 | – | – |
| December | 34 | – | – |
| Year to date (Jan–Jul) | 128 | 132 | ▲ 3.1% |
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 | 71.4% | 94.7% | ▲ 32.6% |
| February | 80.0% | 94.7% | ▲ 18.4% |
| March | 84.9% | 100.0% | ▲ 17.9% |
| April | 78.1% | 56.3% | ▼ 28.0% |
| May | 54.8% | 63.2% | ▲ 15.2% |
| June | 66.7% | 50.0% | ▼ 25.0% |
| July | 83.3% | 55.6% | ▼ 33.3% |
| August | 90.0% | – | – |
| September | 100.0% | – | – |
| October | 91.7% | – | in progress |
| November | 72.0% | – | – |
| December | 88.2% | – | – |
| Year-to-date average (Jan–Jul) | 74.2% | 73.5% | ▼ 0.9% |
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 | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 7 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 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 97.9% 380
- Cancelled 2.1% 8
Share of all recorded flights in the period, all legs. · Oct 31, 2024 → Jul 29, 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 |
|---|---|---|---|---|
| DEN STL Denver International Airport – St. Louis Lambert International Airport | 1,236 | 24.1 min | 65.5% | 58 |
| OAK ABQ Oakland San Francisco Bay Airport – Albuquerque International Sunport | 1,427 | 21.5 min | 62.0% | 50 |
| DAL IND Dallas Love Field – Indianapolis International Airport | 1,215 | 8.7 min | 85.0% | 44 |
| SJC DEN Mineta San Jose International Airport – Denver International Airport | 1,522 | -1.1 min | 97.4% | 39 |
| TUL DAL Tulsa International Airport – Dallas Love Field | 383 | 4.5 min | 87.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 1 | 1 | 100.0% | 0 |
| November 2024 | 17 | 16 | 56.3% | 1 |
| December 2024 | 14 | 14 | 64.3% | 0 |
| January 2025 | 7 | 7 | 71.4% | 0 |
| February 2025 | 10 | 10 | 80.0% | 0 |
| March 2025 | 33 | 33 | 84.9% | 0 |
| April 2025 | 32 | 32 | 78.1% | 0 |
| May 2025 | 31 | 31 | 54.8% | 0 |
| June 2025 | 9 | 9 | 66.7% | 0 |
| July 2025 | 6 | 6 | 83.3% | 0 |
| August 2025 | 10 | 10 | 90.0% | 0 |
| September 2025 | 8 | 8 | 100.0% | 0 |
| October 2025 | 12 | 12 | 91.7% | 0 |
| November 2025 | 32 | 25 | 72.0% | 7 |
| December 2025 | 34 | 34 | 88.2% | 0 |
| January 2026 | 19 | 19 | 94.7% | 0 |
| February 2026 | 19 | 19 | 94.7% | 0 |
| March 2026 | 3 | 3 | 100.0% | 0 |
| April 2026 | 32 | 32 | 56.3% | 0 |
| May 2026 | 38 | 38 | 63.2% | 0 |
| June 2026 | 12 | 12 | 50.0% | 0 |
| July 2026 | 9 | 9 | 55.6% | 0 |