WN1588
WN1588 (Southwest Airlines) is a multi-stop service on 31 routes, busiest Phoenix to St Louis. Of 567 departures recorded from October 2024 to July 2026, 77.1% left on time, according to the US BTS.
- On-time departures77.1%of 567 flights
- Average delay11.6 min
- July 20264▼ 78.9%vs July 2025
- Cancelled1.4%
- Legs flown under this number31
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 | 29 | 35 | ▲ 20.7% |
| February | 20 | 28 | ▲ 40.0% |
| March | 30 | 39 | ▲ 30.0% |
| April | 43 | 32 | ▼ 25.6% |
| May | 44 | 31 | ▼ 29.5% |
| June | 22 | 7 | ▼ 68.2% |
| July | 19 | 4 | ▼ 78.9% |
| August | 28 | – | – |
| September | 30 | – | – |
| October | 18 | – | in progress |
| November | 32 | – | – |
| December | 21 | – | – |
| Year to date (Jan–Jul) | 207 | 176 | ▼ 15.0% |
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 | 92.6% | 90.3% | ▼ 2.5% |
| February | 90.0% | 85.7% | ▼ 4.8% |
| March | 96.7% | 87.2% | ▼ 9.8% |
| April | 76.7% | 68.8% | ▼ 10.4% |
| May | 59.1% | 32.3% | ▼ 45.4% |
| June | 77.3% | 71.4% | ▼ 7.6% |
| July | 79.0% | 75.0% | ▼ 5.0% |
| August | 85.2% | – | – |
| September | 76.7% | – | – |
| October | 61.1% | – | in progress |
| November | 81.3% | – | – |
| December | 71.4% | – | – |
| Year-to-date average (Jan–Jul) | 81.6% | 73.0% | ▼ 10.6% |
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 | 2 | 4 | ▲ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 4 | ▲ 100.0% |
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 98.6% 559
- Cancelled 1.4% 8
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 26, 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 |
|---|---|---|---|---|
| PHX STL Phoenix Sky Harbor International Airport – St. Louis Lambert International Airport | 2,026 | 8.5 min | 85.5% | 71 |
| AUS SFO Austin Bergstrom International Airport – San Francisco International Airport | 2,417 | 32.0 min | 46.6% | 58 |
| MSY BWI Louis Armstrong New Orleans International Airport – Baltimore/Washington International Thurgood Marshall Airport | 1,607 | 10.5 min | 80.4% | 57 |
| STL ATL St. Louis Lambert International Airport – Hartsfield Jackson Atlanta International Airport | 779 | -1.1 min | 88.6% | 47 |
| ALB MCO Albany International Airport – Orlando International Airport | 1,729 | 10.1 min | 88.1% | 42 |
| CMH BNA John Glenn Columbus International Airport – Nashville International Airport | 543 | 2.8 min | 93.9% | 33 |
| BNA CMH Nashville International Airport – John Glenn Columbus International Airport | 543 | 4.2 min | 90.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 82.4% | 0 |
| November 2024 | 20 | 20 | 90.0% | 0 |
| December 2024 | 18 | 17 | 70.6% | 1 |
| January 2025 | 29 | 27 | 92.6% | 2 |
| February 2025 | 20 | 20 | 90.0% | 0 |
| March 2025 | 30 | 30 | 96.7% | 0 |
| April 2025 | 43 | 43 | 76.7% | 0 |
| May 2025 | 44 | 44 | 59.1% | 0 |
| June 2025 | 22 | 22 | 77.3% | 0 |
| July 2025 | 19 | 19 | 79.0% | 0 |
| August 2025 | 28 | 27 | 85.2% | 1 |
| September 2025 | 30 | 30 | 76.7% | 0 |
| October 2025 | 18 | 18 | 61.1% | 0 |
| November 2025 | 32 | 32 | 81.3% | 0 |
| December 2025 | 21 | 21 | 71.4% | 0 |
| January 2026 | 35 | 31 | 90.3% | 4 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 39 | 39 | 87.2% | 0 |
| April 2026 | 32 | 32 | 68.8% | 0 |
| May 2026 | 31 | 31 | 32.3% | 0 |
| June 2026 | 7 | 7 | 71.4% | 0 |
| July 2026 | 4 | 4 | 75.0% | 0 |