WN878
WN878 (Southwest Airlines) is a multi-stop service on 42 routes, busiest Dallas to San Antonio. Of 935 departures recorded from October 2024 to July 2026, 70.9% left on time, according to the US BTS.
- On-time departures70.9%of 935 flights
- Average delay16.5 min
- July 202648▼ 9.4%vs July 2025
- Cancelled1.4%
- Legs flown under this number42
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 | 47 | 59 | ▲ 25.5% |
| April | 37 | 53 | ▲ 43.2% |
| May | 37 | 52 | ▲ 40.5% |
| June | 39 | 46 | ▲ 17.9% |
| July | 53 | 48 | ▼ 9.4% |
| August | 40 | – | – |
| September | 43 | – | – |
| October | 32 | – | in progress |
| November | 55 | – | – |
| December | 60 | – | – |
| Year to date (Jan–Jul) | 273 | 322 | ▲ 17.9% |
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 | 79.3% | 82.9% | ▲ 4.5% |
| February | 96.4% | 53.6% | ▼ 44.4% |
| March | 89.1% | 48.3% | ▼ 45.8% |
| April | 75.7% | 88.7% | ▲ 17.2% |
| May | 81.1% | 53.9% | ▼ 33.6% |
| June | 50.0% | 53.3% | ▲ 6.7% |
| July | 45.3% | 45.8% | ▲ 1.2% |
| August | 70.0% | – | – |
| September | 69.8% | – | – |
| October | 90.3% | – | in progress |
| November | 90.6% | – | – |
| December | 83.3% | – | – |
| Year-to-date average (Jan–Jul) | 73.8% | 60.9% | ▼ 17.5% |
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 | 3 | 1 | ▼ 66.7% |
| February | 0 | 0 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 1 | 0.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 5 | 3 | ▼ 40.0% |
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% 922
- Cancelled 1.4% 13
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
11Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 30 | 30 | 66.7% | 0 |
| November 2024 | 43 | 42 | 90.5% | 1 |
| December 2024 | 37 | 36 | 75.0% | 1 |
| January 2025 | 32 | 29 | 79.3% | 3 |
| February 2025 | 28 | 28 | 96.4% | 0 |
| March 2025 | 47 | 46 | 89.1% | 1 |
| April 2025 | 37 | 37 | 75.7% | 0 |
| May 2025 | 37 | 37 | 81.1% | 0 |
| June 2025 | 39 | 38 | 50.0% | 1 |
| July 2025 | 53 | 53 | 45.3% | 0 |
| August 2025 | 40 | 40 | 70.0% | 0 |
| September 2025 | 43 | 43 | 69.8% | 0 |
| October 2025 | 32 | 31 | 90.3% | 1 |
| November 2025 | 55 | 53 | 90.6% | 2 |
| December 2025 | 60 | 60 | 83.3% | 0 |
| January 2026 | 36 | 35 | 82.9% | 1 |
| February 2026 | 28 | 28 | 53.6% | 0 |
| March 2026 | 59 | 58 | 48.3% | 1 |
| April 2026 | 53 | 53 | 88.7% | 0 |
| May 2026 | 52 | 52 | 53.9% | 0 |
| June 2026 | 46 | 45 | 53.3% | 1 |
| July 2026 | 48 | 48 | 45.8% | 0 |