WN4252
WN4252 (Southwest Airlines) is a multi-stop service on 19 routes, busiest Pittsburgh to Tampa. Of 415 departures recorded from October 2024 to July 2026, 78.7% left on time, according to the US BTS.
- On-time departures78.7%of 415 flights
- Average delay14.0 min
- July 202623▲ 43.8%vs July 2025
- Cancelled0.2%
- Legs flown under this number19
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 30 | 2 | ▼ 93.3% |
| February | 28 | 10 | ▼ 64.3% |
| March | 47 | 8 | ▼ 83.0% |
| April | 24 | 25 | ▲ 4.2% |
| May | 18 | 31 | ▲ 72.2% |
| June | 18 | 22 | ▲ 22.2% |
| July | 16 | 23 | ▲ 43.8% |
| August | 7 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | 22 | – | – |
| December | 21 | – | – |
| Year to date (Jan–Jul) | 181 | 121 | ▼ 33.1% |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 83.3% | 0.0% | ▼ 100.0% |
| February | 82.1% | 60.0% | ▼ 27.0% |
| March | 80.9% | 100.0% | ▲ 23.7% |
| April | 87.5% | 84.0% | ▼ 4.0% |
| May | 83.3% | 87.1% | ▲ 4.5% |
| June | 72.2% | 90.9% | ▲ 25.9% |
| July | 50.0% | 82.6% | ▲ 65.2% |
| August | 85.7% | – | – |
| September | 100.0% | – | – |
| October | – | – | in progress |
| November | 45.5% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Jul) | 77.1% | 72.1% | ▼ 6.4% |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
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 99.8% 414
- Cancelled 0.2% 1
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PIT TPA Pittsburgh International Airport – Tampa International Airport | 1,408 | 8.6 min | 82.4% | 119 |
| SJC MDW Mineta San Jose International Airport – Chicago Midway International Airport | 2,950 | 4.8 min | 86.2% | 58 |
| SAN SFO San Diego International Airport – San Francisco International Airport | 719 | 36.6 min | 53.7% | 42 |
| AUS BWI Austin Bergstrom International Airport – Baltimore/Washington International Thurgood Marshall Airport | 2,156 | 11.6 min | 85.7% | 42 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 26 | 26 | 84.6% | 0 |
| December 2024 | 30 | 30 | 76.7% | 0 |
| January 2025 | 30 | 30 | 83.3% | 0 |
| February 2025 | 28 | 28 | 82.1% | 0 |
| March 2025 | 47 | 47 | 80.9% | 0 |
| April 2025 | 24 | 24 | 87.5% | 0 |
| May 2025 | 18 | 18 | 83.3% | 0 |
| June 2025 | 18 | 18 | 72.2% | 0 |
| July 2025 | 16 | 16 | 50.0% | 0 |
| August 2025 | 7 | 7 | 85.7% | 0 |
| September 2025 | 4 | 4 | 100.0% | 0 |
| November 2025 | 22 | 22 | 45.5% | 0 |
| December 2025 | 21 | 21 | 66.7% | 0 |
| January 2026 | 2 | 1 | 0.0% | 1 |
| February 2026 | 10 | 10 | 60.0% | 0 |
| March 2026 | 8 | 8 | 100.0% | 0 |
| April 2026 | 25 | 25 | 84.0% | 0 |
| May 2026 | 31 | 31 | 87.1% | 0 |
| June 2026 | 22 | 22 | 90.9% | 0 |
| July 2026 | 23 | 23 | 82.6% | 0 |