WN4315
WN4315 (Southwest Airlines) is a multi-stop service on 19 routes, busiest Pittsburgh to Austin. Of 410 departures recorded from October 2024 to July 2026, 70.0% left on time, according to the US BTS.
- On-time departures70.0%of 410 flights
- Average delay15.8 min
- July 202630▼ 16.7%vs July 2025
- Cancelled0.0%
- 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 periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 34 | 2 | ▼ 94.1% |
| February | 42 | – | – |
| March | 25 | 23 | ▼ 8.0% |
| April | 20 | 18 | ▼ 10.0% |
| May | 23 | 18 | ▼ 21.7% |
| June | 32 | 28 | ▼ 12.5% |
| July | 36 | 30 | ▼ 16.7% |
| August | 5 | – | – |
| September | – | – | – |
| October | 21 | – | in progress |
| November | 24 | – | – |
| December | 19 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 85.3% | 100.0% | ▲ 17.2% |
| February | 54.8% | – | – |
| March | 68.0% | 52.2% | ▼ 23.3% |
| April | 85.0% | 72.2% | ▼ 15.0% |
| May | 95.7% | 83.3% | ▼ 12.9% |
| June | 75.0% | 17.9% | ▼ 76.2% |
| July | 83.3% | 53.3% | ▼ 36.0% |
| August | 60.0% | – | – |
| September | – | – | – |
| October | 66.7% | – | in progress |
| November | 79.2% | – | – |
| December | 94.7% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | – | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | 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 100.0% 410
- Cancelled 0.0% 0
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PIT AUS Pittsburgh International Airport – Austin Bergstrom International Airport | 1,946 | 8.7 min | 85.3% | 61 |
| PHX HOU Phoenix Sky Harbor International Airport – William P. Hobby Airport | 1,638 | 34.7 min | 35.1% | 57 |
| OKC STL OKC Will Rogers World Airport – St. Louis Lambert International Airport | 742 | 1.9 min | 92.5% | 40 |
| SJC BUR Mineta San Jose International Airport – Hollywood Burbank/Bob Hope Airport | 477 | 3.8 min | 86.5% | 37 |
| DEN MCI Denver International Airport – Kansas City International Airport | 855 | 14.3 min | 70.3% | 37 |
| SMF BOI Sacramento International Airport – Boise Air Terminal/Gowen Field | 703 | 4.5 min | 81.3% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 88.9% | 0 |
| November 2024 | 1 | 1 | 0.0% | 0 |
| January 2025 | 34 | 34 | 85.3% | 0 |
| February 2025 | 42 | 42 | 54.8% | 0 |
| March 2025 | 25 | 25 | 68.0% | 0 |
| April 2025 | 20 | 20 | 85.0% | 0 |
| May 2025 | 23 | 23 | 95.7% | 0 |
| June 2025 | 32 | 32 | 75.0% | 0 |
| July 2025 | 36 | 36 | 83.3% | 0 |
| August 2025 | 5 | 5 | 60.0% | 0 |
| October 2025 | 21 | 21 | 66.7% | 0 |
| November 2025 | 24 | 24 | 79.2% | 0 |
| December 2025 | 19 | 19 | 94.7% | 0 |
| January 2026 | 2 | 2 | 100.0% | 0 |
| March 2026 | 23 | 23 | 52.2% | 0 |
| April 2026 | 18 | 18 | 72.2% | 0 |
| May 2026 | 18 | 18 | 83.3% | 0 |
| June 2026 | 28 | 28 | 17.9% | 0 |
| July 2026 | 30 | 30 | 53.3% | 0 |