WN2556
WN2556 (Southwest Airlines) is a multi-stop service on 28 routes, busiest Pittsburgh to Nashville. Of 600 departures recorded from October 2024 to July 2026, 75.9% left on time, according to the US BTS.
- On-time departures75.9%of 600 flights
- Average delay12.2 min
- July 202622▼ 29.0%vs July 2025
- Cancelled0.3%
- Legs flown under this number28
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 | 14 | 32 | ▲ 128.6% |
| February | 9 | 18 | ▲ 100.0% |
| March | 21 | 11 | ▼ 47.6% |
| April | 25 | 39 | ▲ 56.0% |
| May | 26 | 48 | ▲ 84.6% |
| June | 30 | 24 | ▼ 20.0% |
| July | 31 | 22 | ▼ 29.0% |
| August | 30 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 44 | – | – |
| December | 37 | – | – |
| Year to date (Jan–Jul) | 156 | 194 | ▲ 24.4% |
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 | 78.6% | 75.0% | ▼ 4.5% |
| February | 66.7% | 50.0% | ▼ 25.0% |
| March | 90.5% | 54.6% | ▼ 39.7% |
| April | 87.5% | 89.7% | ▲ 2.6% |
| May | 76.9% | 85.4% | ▲ 11.1% |
| June | 96.7% | 54.2% | ▼ 44.0% |
| July | 93.6% | 40.9% | ▼ 56.3% |
| August | 73.3% | – | – |
| September | 63.3% | – | – |
| October | 77.4% | – | in progress |
| November | 72.1% | – | – |
| December | 81.1% | – | – |
| Year-to-date average (Jan–Jul) | 84.3% | 64.3% | ▼ 23.8% |
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 | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 0 | ▼ 100.0% |
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 99.7% 598
- Cancelled 0.3% 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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PIT BNA Pittsburgh International Airport – Nashville International Airport | 743 | 1.8 min | 95.1% | 61 |
| PHX TPA Phoenix Sky Harbor International Airport – Tampa International Airport | 2,872 | 19.9 min | 66.7% | 57 |
| LGA DAL LaGuardia Airport – Dallas Love Field | 2,219 | 7.3 min | 83.7% | 50 |
| STL MKE St. Louis Lambert International Airport – General Mitchell International Airport | 511 | 8.4 min | 71.1% | 45 |
| SAT LAS San Antonio International Airport – Harry Reid International Airport | 1,718 | -3.3 min | 97.6% | 42 |
| MCI HOU Kansas City International Airport – William P. Hobby Airport | 1,075 | 36.8 min | 42.9% | 42 |
| DEN MDW Denver International Airport – Chicago Midway International Airport | 1,438 | 10.9 min | 72.7% | 33 |
| PIT BWI Pittsburgh International Airport – Baltimore/Washington International Thurgood Marshall Airport | 338 | 19.7 min | 77.4% | 31 |
| LAS BUR Harry Reid International Airport – Hollywood Burbank/Bob Hope Airport | 359 | 7.8 min | 74.2% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 30 | 30 | 83.3% | 0 |
| November 2024 | 20 | 20 | 65.0% | 0 |
| December 2024 | 28 | 28 | 64.3% | 0 |
| January 2025 | 14 | 14 | 78.6% | 0 |
| February 2025 | 9 | 9 | 66.7% | 0 |
| March 2025 | 21 | 21 | 90.5% | 0 |
| April 2025 | 25 | 24 | 87.5% | 1 |
| May 2025 | 26 | 26 | 76.9% | 0 |
| June 2025 | 30 | 30 | 96.7% | 0 |
| July 2025 | 31 | 31 | 93.6% | 0 |
| August 2025 | 30 | 30 | 73.3% | 0 |
| September 2025 | 30 | 30 | 63.3% | 0 |
| October 2025 | 31 | 31 | 77.4% | 0 |
| November 2025 | 44 | 43 | 72.1% | 1 |
| December 2025 | 37 | 37 | 81.1% | 0 |
| January 2026 | 32 | 32 | 75.0% | 0 |
| February 2026 | 18 | 18 | 50.0% | 0 |
| March 2026 | 11 | 11 | 54.6% | 0 |
| April 2026 | 39 | 39 | 89.7% | 0 |
| May 2026 | 48 | 48 | 85.4% | 0 |
| June 2026 | 24 | 24 | 54.2% | 0 |
| July 2026 | 22 | 22 | 40.9% | 0 |