WN139
WN139 (Southwest Airlines) is a multi-stop service on 46 routes, busiest Phoenix to Chicago. Of 871 departures recorded from October 2024 to July 2026, 85.1% left on time, according to the US BTS.
- On-time departures85.1%of 871 flights
- Average delay6.5 min
- July 202631▼ 59.7%vs July 2025
- Cancelled0.5%
- Legs flown under this number46
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 | 32 | 36 | ▲ 12.5% |
| February | 28 | 28 | 0.0% |
| March | 23 | 43 | ▲ 87.0% |
| April | 28 | 54 | ▲ 92.9% |
| May | 33 | 57 | ▲ 72.7% |
| June | 72 | 33 | ▼ 54.2% |
| July | 77 | 31 | ▼ 59.7% |
| August | 37 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 46 | – | – |
| December | 53 | – | – |
| Year to date (Jan–Jul) | 293 | 282 | ▼ 3.8% |
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 | 93.6% | 100.0% | ▲ 6.9% |
| February | 82.1% | 100.0% | ▲ 21.7% |
| March | 69.6% | 66.7% | ▼ 4.2% |
| April | 71.4% | 94.4% | ▲ 32.2% |
| May | 69.7% | 91.2% | ▲ 30.9% |
| June | 81.9% | 97.0% | ▲ 18.3% |
| July | 83.1% | 100.0% | ▲ 20.3% |
| August | 83.8% | – | – |
| September | 90.0% | – | – |
| October | 64.5% | – | in progress |
| November | 87.0% | – | – |
| December | 80.8% | – | – |
| Year-to-date average (Jan–Jul) | 78.8% | 92.8% | ▲ 17.7% |
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 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| 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 99.5% 867
- Cancelled 0.5% 4
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 | 95.0% | 0 |
| November 2024 | 43 | 43 | 86.1% | 0 |
| December 2024 | 36 | 35 | 85.7% | 1 |
| January 2025 | 32 | 31 | 93.6% | 1 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 23 | 23 | 69.6% | 0 |
| April 2025 | 28 | 28 | 71.4% | 0 |
| May 2025 | 33 | 33 | 69.7% | 0 |
| June 2025 | 72 | 72 | 81.9% | 0 |
| July 2025 | 77 | 77 | 83.1% | 0 |
| August 2025 | 37 | 37 | 83.8% | 0 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 31 | 31 | 64.5% | 0 |
| November 2025 | 46 | 46 | 87.0% | 0 |
| December 2025 | 53 | 52 | 80.8% | 1 |
| January 2026 | 36 | 36 | 100.0% | 0 |
| February 2026 | 28 | 28 | 100.0% | 0 |
| March 2026 | 43 | 42 | 66.7% | 1 |
| April 2026 | 54 | 54 | 94.4% | 0 |
| May 2026 | 57 | 57 | 91.2% | 0 |
| June 2026 | 33 | 33 | 97.0% | 0 |
| July 2026 | 31 | 31 | 100.0% | 0 |