WN1646
WN1646 (Southwest Airlines) is a multi-stop service on 33 routes, busiest St Louis to Phoenix. Of 684 departures recorded from October 2024 to July 2026, 76.1% left on time, according to the US BTS.
- On-time departures76.1%of 684 flights
- Average delay14.6 min
- July 20269▼ 71.0%vs July 2025
- Cancelled1.6%
- Legs flown under this number33
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 | 35 | 44 | ▲ 25.7% |
| February | 33 | 35 | ▲ 6.1% |
| March | 38 | 32 | ▼ 15.8% |
| April | 32 | 6 | ▼ 81.3% |
| May | 31 | 1 | ▼ 96.8% |
| June | 30 | 7 | ▼ 76.7% |
| July | 31 | 9 | ▼ 71.0% |
| August | 35 | – | – |
| September | 34 | – | – |
| October | 27 | – | in progress |
| November | 58 | – | – |
| December | 86 | – | – |
| Year to date (Jan–Jul) | 230 | 134 | ▼ 41.7% |
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 | 94.1% | 81.4% | ▼ 13.5% |
| February | 90.9% | 87.5% | ▼ 3.8% |
| March | 86.8% | 87.5% | ▲ 0.8% |
| April | 84.4% | 100.0% | ▲ 18.5% |
| May | 80.0% | 100.0% | ▲ 25.0% |
| June | 30.0% | 28.6% | ▼ 4.8% |
| July | 40.0% | 22.2% | ▼ 44.5% |
| August | 71.4% | – | – |
| September | 79.4% | – | – |
| October | 52.0% | – | in progress |
| November | 82.1% | – | – |
| December | 74.4% | – | – |
| Year-to-date average (Jan–Jul) | 72.3% | 72.5% | ▲ 0.2% |
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 | 1 | 0.0% |
| February | 0 | 3 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 2 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 4 | ▲ 33.3% |
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 98.4% 673
- Cancelled 1.6% 11
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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL PHX St. Louis Lambert International Airport – Phoenix Sky Harbor International Airport | 2,026 | 9.5 min | 88.0% | 84 |
| MDW MEM Chicago Midway International Airport – Frederick W. Smith International Airport | 774 | 7.6 min | 86.2% | 59 |
| DEN MDW Denver International Airport – Chicago Midway International Airport | 1,438 | 8.8 min | 79.3% | 58 |
| PHX SJC Phoenix Sky Harbor International Airport – Mineta San Jose International Airport | 999 | 4.0 min | 83.9% | 57 |
| DEN SAN Denver International Airport – San Diego International Airport | 1,371 | 61.8 min | 28.6% | 50 |
| MDW LGA Chicago Midway International Airport – LaGuardia Airport | 1,164 | 5.6 min | 84.4% | 47 |
| SAN HNL San Diego International Airport – Daniel K. Inouye International Airport | 4,201 | 7.9 min | 87.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 100.0% | 0 |
| November 2024 | 29 | 29 | 93.1% | 0 |
| December 2024 | 37 | 37 | 73.0% | 0 |
| January 2025 | 35 | 34 | 94.1% | 1 |
| February 2025 | 33 | 33 | 90.9% | 0 |
| March 2025 | 38 | 38 | 86.8% | 0 |
| April 2025 | 32 | 32 | 84.4% | 0 |
| May 2025 | 31 | 30 | 80.0% | 1 |
| June 2025 | 30 | 30 | 30.0% | 0 |
| July 2025 | 31 | 30 | 40.0% | 1 |
| August 2025 | 35 | 35 | 71.4% | 0 |
| September 2025 | 34 | 34 | 79.4% | 0 |
| October 2025 | 27 | 25 | 52.0% | 2 |
| November 2025 | 58 | 56 | 82.1% | 2 |
| December 2025 | 86 | 86 | 74.4% | 0 |
| January 2026 | 44 | 43 | 81.4% | 1 |
| February 2026 | 35 | 32 | 87.5% | 3 |
| March 2026 | 32 | 32 | 87.5% | 0 |
| April 2026 | 6 | 6 | 100.0% | 0 |
| May 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 7 | 7 | 28.6% | 0 |
| July 2026 | 9 | 9 | 22.2% | 0 |