WN1587
WN1587 (Southwest Airlines) is a multi-stop service on 31 routes, busiest Phoenix to Chicago. Of 630 departures recorded from October 2024 to July 2026, 79.0% left on time, according to the US BTS.
- On-time departures79.0%of 630 flights
- Average delay9.7 min
- July 202633▲ 6.5%vs July 2025
- Cancelled1.0%
- 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 | 9 | 29 | ▲ 222.2% |
| February | 17 | 24 | ▲ 41.2% |
| March | 31 | 31 | 0.0% |
| April | 36 | 35 | ▼ 2.8% |
| May | 39 | 40 | ▲ 2.6% |
| June | 31 | 33 | ▲ 6.5% |
| July | 31 | 33 | ▲ 6.5% |
| August | 29 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 34 | – | – |
| December | 35 | – | – |
| Year to date (Jan–Jul) | 194 | 225 | ▲ 16.0% |
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 | 75.0% | 62.1% | ▼ 17.2% |
| February | 100.0% | 62.5% | ▼ 37.5% |
| March | 77.4% | 48.3% | ▼ 37.6% |
| April | 91.7% | 77.1% | ▼ 15.9% |
| May | 97.4% | 75.0% | ▼ 23.0% |
| June | 93.6% | 50.0% | ▼ 46.6% |
| July | 83.9% | 51.5% | ▼ 38.6% |
| August | 93.1% | – | – |
| September | 96.7% | – | – |
| October | 100.0% | – | in progress |
| November | 75.8% | – | – |
| December | 74.3% | – | – |
| Year-to-date average (Jan–Jul) | 88.4% | 60.9% | ▼ 31.1% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
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 99.0% 624
- Cancelled 1.0% 6
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 19 | 18 | 94.4% | 1 |
| December 2024 | 14 | 14 | 85.7% | 0 |
| January 2025 | 9 | 8 | 75.0% | 1 |
| February 2025 | 17 | 17 | 100.0% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 36 | 36 | 91.7% | 0 |
| May 2025 | 39 | 39 | 97.4% | 0 |
| June 2025 | 31 | 31 | 93.6% | 0 |
| July 2025 | 31 | 31 | 83.9% | 0 |
| August 2025 | 29 | 29 | 93.1% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 30 | 30 | 100.0% | 0 |
| November 2025 | 34 | 33 | 75.8% | 1 |
| December 2025 | 35 | 35 | 74.3% | 0 |
| January 2026 | 29 | 29 | 62.1% | 0 |
| February 2026 | 24 | 24 | 62.5% | 0 |
| March 2026 | 31 | 29 | 48.3% | 2 |
| April 2026 | 35 | 35 | 77.1% | 0 |
| May 2026 | 40 | 40 | 75.0% | 0 |
| June 2026 | 33 | 32 | 50.0% | 1 |
| July 2026 | 33 | 33 | 51.5% | 0 |