WN378
WN378 (Southwest Airlines) is a multi-stop service on 31 routes, busiest Dallas to Austin. Of 615 departures recorded from October 2024 to July 2026, 71.8% left on time, according to the US BTS.
- On-time departures71.8%of 615 flights
- Average delay16.0 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.0%
- Legs flown under this number31
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 27 | ▼ 15.6% |
| February | 28 | 27 | ▼ 3.6% |
| March | 27 | 31 | ▲ 14.8% |
| April | 26 | 30 | ▲ 15.4% |
| May | 27 | 30 | ▲ 11.1% |
| June | 29 | 30 | ▲ 3.4% |
| July | 31 | 31 | 0.0% |
| August | 24 | – | – |
| September | 21 | – | – |
| October | 17 | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 200 | 206 | ▲ 3.0% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 87.1% | 72.0% | ▼ 17.3% |
| February | 82.1% | 92.3% | ▲ 12.4% |
| March | 96.2% | 96.8% | ▲ 0.6% |
| April | 96.2% | 40.0% | ▼ 58.4% |
| May | 81.5% | 10.0% | ▼ 87.7% |
| June | 65.5% | 23.3% | ▼ 64.4% |
| July | 63.3% | 54.8% | ▼ 13.4% |
| August | 58.3% | – | – |
| September | 90.5% | – | – |
| October | 82.4% | – | in progress |
| November | 82.1% | – | – |
| December | 62.1% | – | – |
| Year-to-date average (Jan–Jul) | 81.7% | 55.6% | ▼ 31.9% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 2 | ▲ 100.0% |
| February | 0 | 1 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 3 | 3 | 0.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.0% 609
- 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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DAL AUS Dallas Love Field – Austin Bergstrom International Airport | 304 | 16.4 min | 76.3% | 60 |
| DEN BOS Denver International Airport – Boston Logan International Airport | 2,816 | 58.1 min | 17.5% | 57 |
| DEN LGA Denver International Airport – LaGuardia Airport | 2,600 | 5.3 min | 84.3% | 53 |
| LAS BWI Harry Reid International Airport – Baltimore/Washington International Thurgood Marshall Airport | 3,381 | 5.1 min | 86.0% | 50 |
| AUS PHX Austin Bergstrom International Airport – Phoenix Sky Harbor International Airport | 1,401 | 32.1 min | 38.0% | 50 |
| PDX SMF Portland International Airport – Sacramento International Airport | 771 | 17.8 min | 72.1% | 43 |
| STL ATL St. Louis Lambert International Airport – Hartsfield Jackson Atlanta International Airport | 779 | 7.6 min | 90.5% | 42 |
| BNA PHL Nashville International Airport – Philadelphia International Airport | 1,084 | 11.3 min | 76.9% | 39 |
| LAS STL Harry Reid International Airport – St. Louis Lambert International Airport | 2,202 | 1.1 min | 91.7% | 36 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 27 | 27 | 92.6% | 0 |
| November 2024 | 30 | 30 | 86.7% | 0 |
| December 2024 | 33 | 33 | 81.8% | 0 |
| January 2025 | 32 | 31 | 87.1% | 1 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 27 | 26 | 96.2% | 1 |
| April 2025 | 26 | 26 | 96.2% | 0 |
| May 2025 | 27 | 27 | 81.5% | 0 |
| June 2025 | 29 | 29 | 65.5% | 0 |
| July 2025 | 31 | 30 | 63.3% | 1 |
| August 2025 | 24 | 24 | 58.3% | 0 |
| September 2025 | 21 | 21 | 90.5% | 0 |
| October 2025 | 17 | 17 | 82.4% | 0 |
| November 2025 | 28 | 28 | 82.1% | 0 |
| December 2025 | 29 | 29 | 62.1% | 0 |
| January 2026 | 27 | 25 | 72.0% | 2 |
| February 2026 | 27 | 26 | 92.3% | 1 |
| March 2026 | 31 | 31 | 96.8% | 0 |
| April 2026 | 30 | 30 | 40.0% | 0 |
| May 2026 | 30 | 30 | 10.0% | 0 |
| June 2026 | 30 | 30 | 23.3% | 0 |
| July 2026 | 31 | 31 | 54.8% | 0 |