WN4148
WN4148 (Southwest Airlines) is a multi-stop service on 16 routes, busiest Indianapolis to Dallas. Of 343 departures recorded from October 2024 to July 2026, 79.8% left on time, according to the US BTS.
- On-time departures79.8%of 343 flights
- Average delay10.9 min
- July 202617▼ 34.6%vs July 2025
- Cancelled0.6%
- Legs flown under this number16
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 | 16 | 7 | ▼ 56.3% |
| February | 24 | 2 | ▼ 91.7% |
| March | 30 | – | – |
| April | 13 | 11 | ▼ 15.4% |
| May | 8 | 13 | ▲ 62.5% |
| June | 23 | 18 | ▼ 21.7% |
| July | 26 | 17 | ▼ 34.6% |
| August | 3 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 30 | – | – |
| December | 40 | – | – |
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 | 87.5% | 71.4% | ▼ 18.4% |
| February | 79.2% | 100.0% | ▲ 26.3% |
| March | 76.7% | – | – |
| April | 66.7% | 90.9% | ▲ 36.4% |
| May | 87.5% | 76.9% | ▼ 12.1% |
| June | 95.5% | 16.7% | ▼ 82.5% |
| July | 100.0% | 35.3% | ▼ 64.7% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 93.3% | – | – |
| December | 87.5% | – | – |
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 | 0 | – |
| March | 0 | – | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| 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 99.4% 341
- Cancelled 0.6% 2
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| IND DAL Indianapolis International Airport – Dallas Love Field | 1,215 | 10.2 min | 81.5% | 81 |
| STL BNA St. Louis Lambert International Airport – Nashville International Airport | 437 | 5.8 min | 89.7% | 58 |
| ONT SMF Ontario International Airport – Sacramento International Airport | 627 | -2.7 min | 98.0% | 51 |
| SAN BWI San Diego International Airport – Baltimore/Washington International Thurgood Marshall Airport | 3,686 | 44.2 min | 21.2% | 33 |
| MDW LAX Chicago Midway International Airport – Los Angeles International Airport | 2,812 | 13.4 min | 71.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 88.9% | 0 |
| November 2024 | 25 | 25 | 92.0% | 0 |
| December 2024 | 28 | 28 | 75.0% | 0 |
| January 2025 | 16 | 16 | 87.5% | 0 |
| February 2025 | 24 | 24 | 79.2% | 0 |
| March 2025 | 30 | 30 | 76.7% | 0 |
| April 2025 | 13 | 12 | 66.7% | 1 |
| May 2025 | 8 | 8 | 87.5% | 0 |
| June 2025 | 23 | 22 | 95.5% | 1 |
| July 2025 | 26 | 26 | 100.0% | 0 |
| August 2025 | 3 | 3 | 100.0% | 0 |
| November 2025 | 30 | 30 | 93.3% | 0 |
| December 2025 | 40 | 40 | 87.5% | 0 |
| January 2026 | 7 | 7 | 71.4% | 0 |
| February 2026 | 2 | 2 | 100.0% | 0 |
| April 2026 | 11 | 11 | 90.9% | 0 |
| May 2026 | 13 | 13 | 76.9% | 0 |
| June 2026 | 18 | 18 | 16.7% | 0 |
| July 2026 | 17 | 17 | 35.3% | 0 |