WN3539
WN3539 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Baltimore to Austin. Of 382 departures recorded from October 2024 to July 2026, 62.6% left on time, according to the US BTS.
- On-time departures62.6%of 382 flights
- Average delay21.8 min
- July 202630▼ 11.8%vs July 2025
- Cancelled0.5%
- Legs flown under this number17
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods16 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 20 | 3 | ▼ 85.0% |
| February | 16 | – | – |
| March | 33 | 4 | ▼ 87.9% |
| April | 8 | 25 | ▲ 212.5% |
| May | – | 31 | – |
| June | 30 | 30 | 0.0% |
| July | 34 | 30 | ▼ 11.8% |
| August | 9 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | 32 | – | – |
| December | 33 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods16 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 70.0% | 0.0% | ▼ 100.0% |
| February | 62.5% | – | – |
| March | 84.9% | 33.3% | ▼ 60.7% |
| April | 71.4% | 52.0% | ▼ 27.2% |
| May | – | 32.3% | – |
| June | 70.0% | 56.7% | ▼ 19.0% |
| July | 44.1% | 33.3% | ▼ 24.5% |
| August | 77.8% | – | – |
| September | 75.0% | – | – |
| October | – | – | in progress |
| November | 75.0% | – | – |
| December | 81.8% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | – | – |
| March | 0 | 1 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | – | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 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% 380
- Cancelled 0.5% 2
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI AUS Baltimore/Washington International Thurgood Marshall Airport – Austin Bergstrom International Airport | 2,156 | 24.4 min | 61.7% | 60 |
| DEN SMF Denver International Airport – Sacramento International Airport | 1,460 | 38.9 min | 37.9% | 58 |
| SAN SJC San Diego International Airport – Mineta San Jose International Airport | 671 | 23.3 min | 46.0% | 50 |
| ATL DAL Hartsfield Jackson Atlanta International Airport – Dallas Love Field | 1,158 | 10.5 min | 80.0% | 45 |
| MCI MSY Kansas City International Airport – Louis Armstrong New Orleans International Airport | 1,112 | 1.7 min | 87.5% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 8 | 8 | 75.0% | 0 |
| December 2024 | 12 | 12 | 75.0% | 0 |
| January 2025 | 20 | 20 | 70.0% | 0 |
| February 2025 | 16 | 16 | 62.5% | 0 |
| March 2025 | 33 | 33 | 84.9% | 0 |
| April 2025 | 8 | 7 | 71.4% | 1 |
| June 2025 | 30 | 30 | 70.0% | 0 |
| July 2025 | 34 | 34 | 44.1% | 0 |
| August 2025 | 9 | 9 | 77.8% | 0 |
| September 2025 | 4 | 4 | 75.0% | 0 |
| November 2025 | 32 | 32 | 75.0% | 0 |
| December 2025 | 33 | 33 | 81.8% | 0 |
| January 2026 | 3 | 3 | 0.0% | 0 |
| March 2026 | 4 | 3 | 33.3% | 1 |
| April 2026 | 25 | 25 | 52.0% | 0 |
| May 2026 | 31 | 31 | 32.3% | 0 |
| June 2026 | 30 | 30 | 56.7% | 0 |
| July 2026 | 30 | 30 | 33.3% | 0 |