WN172
WN172 (Southwest Airlines) is a multi-stop service on 37 routes, busiest St Louis to Baltimore. Of 756 departures recorded from October 2024 to July 2026, 78.4% left on time, according to the US BTS.
- On-time departures78.4%of 756 flights
- Average delay13.3 min
- July 202631▲ 19.2%vs July 2025
- Cancelled1.6%
- Legs flown under this number37
Recorded departures by month
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 | 30 | 36 | ▲ 20.0% |
| February | 28 | 40 | ▲ 42.9% |
| March | 31 | 37 | ▲ 19.4% |
| April | 53 | 41 | ▼ 22.6% |
| May | 63 | 44 | ▼ 30.2% |
| June | 29 | 31 | ▲ 6.9% |
| July | 26 | 31 | ▲ 19.2% |
| August | 42 | – | – |
| September | 43 | – | – |
| October | 18 | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 260 | 260 | 0.0% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
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 | 90.0% | 85.3% | ▼ 5.2% |
| February | 96.4% | 84.6% | ▼ 12.2% |
| March | 90.0% | 67.6% | ▼ 24.9% |
| April | 77.4% | 82.9% | ▲ 7.2% |
| May | 68.3% | 88.6% | ▲ 29.9% |
| June | 82.8% | 50.0% | ▼ 39.6% |
| July | 95.8% | 42.9% | ▼ 55.3% |
| August | 61.9% | – | – |
| September | 83.7% | – | – |
| October | 94.4% | – | in progress |
| November | 70.4% | – | – |
| December | 71.4% | – | – |
| Year-to-date average (Jan–Jul) | 85.8% | 71.7% | ▼ 16.4% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | 0 | 1 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 2 | 3 | ▲ 50.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 3 | 7 | ▲ 133.3% |
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 98.4% 744
- Cancelled 1.6% 12
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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 30 | 30 | 90.0% | 0 |
| December 2024 | 26 | 26 | 80.8% | 0 |
| January 2025 | 30 | 30 | 90.0% | 0 |
| February 2025 | 28 | 28 | 96.4% | 0 |
| March 2025 | 31 | 30 | 90.0% | 1 |
| April 2025 | 53 | 53 | 77.4% | 0 |
| May 2025 | 63 | 63 | 68.3% | 0 |
| June 2025 | 29 | 29 | 82.8% | 0 |
| July 2025 | 26 | 24 | 95.8% | 2 |
| August 2025 | 42 | 42 | 61.9% | 0 |
| September 2025 | 43 | 43 | 83.7% | 0 |
| October 2025 | 18 | 18 | 94.4% | 0 |
| November 2025 | 28 | 27 | 70.4% | 1 |
| December 2025 | 29 | 28 | 71.4% | 1 |
| January 2026 | 36 | 34 | 85.3% | 2 |
| February 2026 | 40 | 39 | 84.6% | 1 |
| March 2026 | 37 | 37 | 67.6% | 0 |
| April 2026 | 41 | 41 | 82.9% | 0 |
| May 2026 | 44 | 44 | 88.6% | 0 |
| June 2026 | 31 | 30 | 50.0% | 1 |
| July 2026 | 31 | 28 | 42.9% | 3 |