WN3516
WN3516 (Southwest Airlines) is a multi-stop service on 23 routes, busiest Phoenix to St Louis. Of 333 departures recorded from October 2024 to July 2026, 65.6% left on time, according to the US BTS.
- On-time departures65.6%of 333 flights
- Average delay16.4 min
- July 202614▼ 66.7%vs July 2025
- Cancelled0.6%
- Legs flown under this number23
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 | 9 | 2 | ▼ 77.8% |
| February | 4 | 7 | ▲ 75.0% |
| March | 10 | 20 | ▲ 100.0% |
| April | 6 | 28 | ▲ 366.7% |
| May | 4 | 30 | ▲ 650.0% |
| June | 39 | 15 | ▼ 61.5% |
| July | 42 | 14 | ▼ 66.7% |
| August | 17 | – | – |
| September | 12 | – | – |
| October | 29 | – | in progress |
| November | 18 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 114 | 116 | ▲ 1.8% |
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 | 100.0% | 100.0% | 0.0% |
| February | 100.0% | 83.3% | ▼ 16.7% |
| March | 100.0% | 45.0% | ▼ 55.0% |
| April | 100.0% | 64.3% | ▼ 35.7% |
| May | 100.0% | 70.0% | ▼ 30.0% |
| June | 61.5% | 40.0% | ▼ 35.0% |
| July | 53.7% | 64.3% | ▲ 19.8% |
| August | 47.1% | – | – |
| September | 50.0% | – | – |
| October | 65.5% | – | in progress |
| November | 66.7% | – | – |
| December | 100.0% | – | – |
| Year-to-date average (Jan–Jul) | 87.9% | 66.7% | ▼ 24.1% |
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 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 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 99.4% 331
- Cancelled 0.6% 2
Share of all recorded flights in the period, all legs. · Oct 15, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX STL Phoenix Sky Harbor International Airport – St. Louis Lambert International Airport | 2,026 | 14.0 min | 68.4% | 57 |
| DEN LAS Denver International Airport – Harry Reid International Airport | 1,009 | 13.4 min | 70.5% | 44 |
| LAS RNO Harry Reid International Airport – Reno Tahoe International Airport | 556 | 24.5 min | 40.0% | 41 |
| LBB LAS Lubbock Preston Smith International Airport – Harry Reid International Airport | 1,244 | 16.7 min | 66.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 7 | 7 | 100.0% | 0 |
| November 2024 | 6 | 6 | 100.0% | 0 |
| December 2024 | 12 | 12 | 66.7% | 0 |
| January 2025 | 9 | 9 | 100.0% | 0 |
| February 2025 | 4 | 4 | 100.0% | 0 |
| March 2025 | 10 | 10 | 100.0% | 0 |
| April 2025 | 6 | 6 | 100.0% | 0 |
| May 2025 | 4 | 4 | 100.0% | 0 |
| June 2025 | 39 | 39 | 61.5% | 0 |
| July 2025 | 42 | 41 | 53.7% | 1 |
| August 2025 | 17 | 17 | 47.1% | 0 |
| September 2025 | 12 | 12 | 50.0% | 0 |
| October 2025 | 29 | 29 | 65.5% | 0 |
| November 2025 | 18 | 18 | 66.7% | 0 |
| December 2025 | 2 | 2 | 100.0% | 0 |
| January 2026 | 2 | 2 | 100.0% | 0 |
| February 2026 | 7 | 6 | 83.3% | 1 |
| March 2026 | 20 | 20 | 45.0% | 0 |
| April 2026 | 28 | 28 | 64.3% | 0 |
| May 2026 | 30 | 30 | 70.0% | 0 |
| June 2026 | 15 | 15 | 40.0% | 0 |
| July 2026 | 14 | 14 | 64.3% | 0 |