WN159
WN159 (Southwest Airlines) is a multi-stop service on 37 routes, busiest Raleigh to Denver. Of 761 departures recorded from October 2024 to July 2026, 79.7% left on time, according to the US BTS.
- On-time departures79.7%of 761 flights
- Average delay10.0 min
- July 202655▲ 71.9%vs July 2025
- Cancelled0.5%
- Legs flown under this number37
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 | 33 | ▲ 6.5% |
| February | 20 | 28 | ▲ 40.0% |
| March | 48 | 31 | ▼ 35.4% |
| April | 33 | 32 | ▼ 3.0% |
| May | 25 | 36 | ▲ 44.0% |
| June | 30 | 52 | ▲ 73.3% |
| July | 32 | 55 | ▲ 71.9% |
| August | 35 | – | – |
| September | 34 | – | – |
| October | 37 | – | in progress |
| November | 39 | – | – |
| December | 45 | – | – |
| Year to date (Jan–Jul) | 219 | 267 | ▲ 21.9% |
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 | 93.6% | 84.4% | ▼ 9.8% |
| February | 100.0% | 82.1% | ▼ 17.9% |
| March | 93.8% | 90.3% | ▼ 3.7% |
| April | 74.2% | 84.4% | ▲ 13.7% |
| May | 68.0% | 83.3% | ▲ 22.5% |
| June | 70.0% | 57.7% | ▼ 17.6% |
| July | 59.4% | 64.8% | ▲ 9.1% |
| August | 91.4% | – | – |
| September | 88.2% | – | – |
| October | 75.7% | – | in progress |
| November | 87.2% | – | – |
| December | 71.1% | – | – |
| Year-to-date average (Jan–Jul) | 79.8% | 78.1% | ▼ 2.1% |
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 | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 2 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 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% 757
- 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
12Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 27 | 27 | 74.1% | 0 |
| November 2024 | 29 | 29 | 93.1% | 0 |
| December 2024 | 29 | 29 | 89.7% | 0 |
| January 2025 | 31 | 31 | 93.6% | 0 |
| February 2025 | 20 | 20 | 100.0% | 0 |
| March 2025 | 48 | 48 | 93.8% | 0 |
| April 2025 | 33 | 31 | 74.2% | 2 |
| May 2025 | 25 | 25 | 68.0% | 0 |
| June 2025 | 30 | 30 | 70.0% | 0 |
| July 2025 | 32 | 32 | 59.4% | 0 |
| August 2025 | 35 | 35 | 91.4% | 0 |
| September 2025 | 34 | 34 | 88.2% | 0 |
| October 2025 | 37 | 37 | 75.7% | 0 |
| November 2025 | 39 | 39 | 87.2% | 0 |
| December 2025 | 45 | 45 | 71.1% | 0 |
| January 2026 | 33 | 32 | 84.4% | 1 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 31 | 31 | 90.3% | 0 |
| April 2026 | 32 | 32 | 84.4% | 0 |
| May 2026 | 36 | 36 | 83.3% | 0 |
| June 2026 | 52 | 52 | 57.7% | 0 |
| July 2026 | 55 | 54 | 64.8% | 1 |