WN1539
WN1539 (Southwest Airlines) is a multi-stop service on 35 routes, busiest Burbank to Phoenix. Of 807 departures recorded from October 2024 to July 2026, 73.6% left on time, according to the US BTS.
- On-time departures73.6%of 807 flights
- Average delay14.2 min
- July 202652▲ 67.7%vs July 2025
- Cancelled1.0%
- Legs flown under this number35
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 | 31 | 34 | ▲ 9.7% |
| February | 28 | 38 | ▲ 35.7% |
| March | 31 | 32 | ▲ 3.2% |
| April | 30 | 24 | ▼ 20.0% |
| May | 31 | 22 | ▼ 29.0% |
| June | 30 | 50 | ▲ 66.7% |
| July | 31 | 52 | ▲ 67.7% |
| August | 58 | – | – |
| September | 60 | – | – |
| October | 64 | – | in progress |
| November | 44 | – | – |
| December | 43 | – | – |
| Year to date (Jan–Jul) | 212 | 252 | ▲ 18.9% |
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 | 70.0% | 84.4% | ▲ 20.5% |
| February | 75.0% | 81.6% | ▲ 8.8% |
| March | 71.0% | 56.7% | ▼ 20.1% |
| April | 90.0% | 75.0% | ▼ 16.7% |
| May | 93.6% | 100.0% | ▲ 6.9% |
| June | 100.0% | 42.0% | ▼ 58.0% |
| July | 93.3% | 57.7% | ▼ 38.2% |
| August | 89.7% | – | – |
| September | 73.3% | – | – |
| October | 65.6% | – | in progress |
| November | 62.8% | – | – |
| December | 47.6% | – | – |
| Year-to-date average (Jan–Jul) | 84.7% | 71.0% | ▼ 16.1% |
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 | 2 | ▲ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
| 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 99.0% 799
- Cancelled 1.0% 8
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
12Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 94.1% | 0 |
| November 2024 | 27 | 27 | 85.2% | 0 |
| December 2024 | 30 | 30 | 66.7% | 0 |
| January 2025 | 31 | 30 | 70.0% | 1 |
| February 2025 | 28 | 28 | 75.0% | 0 |
| March 2025 | 31 | 31 | 71.0% | 0 |
| April 2025 | 30 | 30 | 90.0% | 0 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 30 | 30 | 100.0% | 0 |
| July 2025 | 31 | 30 | 93.3% | 1 |
| August 2025 | 58 | 58 | 89.7% | 0 |
| September 2025 | 60 | 60 | 73.3% | 0 |
| October 2025 | 64 | 64 | 65.6% | 0 |
| November 2025 | 44 | 43 | 62.8% | 1 |
| December 2025 | 43 | 42 | 47.6% | 1 |
| January 2026 | 34 | 32 | 84.4% | 2 |
| February 2026 | 38 | 38 | 81.6% | 0 |
| March 2026 | 32 | 30 | 56.7% | 2 |
| April 2026 | 24 | 24 | 75.0% | 0 |
| May 2026 | 22 | 22 | 100.0% | 0 |
| June 2026 | 50 | 50 | 42.0% | 0 |
| July 2026 | 52 | 52 | 57.7% | 0 |