WN4146
WN4146 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Denver to Baltimore. Of 443 departures recorded from October 2024 to July 2026, 70.8% left on time, according to the US BTS.
- On-time departures70.8%of 443 flights
- Average delay17.4 min
- July 202618
- Cancelled0.5%
- Legs flown under this number17
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 | 29 | 31 | ▲ 6.9% |
| February | 28 | 34 | ▲ 21.4% |
| March | 27 | 5 | ▼ 81.5% |
| April | 15 | 24 | ▲ 60.0% |
| May | 15 | 31 | ▲ 106.7% |
| June | 1 | 19 | ▲ 1,800.0% |
| July | – | 18 | – |
| August | 26 | – | – |
| September | 30 | – | – |
| October | 1 | – | in progress |
| November | 26 | – | – |
| December | 29 | – | – |
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 | 69.0% | 74.2% | ▲ 7.6% |
| February | 57.7% | 67.7% | ▲ 17.3% |
| March | 70.4% | 60.0% | ▼ 14.7% |
| April | 53.3% | 70.8% | ▲ 32.8% |
| May | 66.7% | 54.8% | ▼ 17.7% |
| June | 0.0% | 89.5% | – |
| July | – | 94.4% | – |
| August | 92.3% | – | – |
| September | 93.3% | – | – |
| October | 100.0% | – | in progress |
| November | 69.2% | – | – |
| December | 58.6% | – | – |
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 | 0 | – |
| February | 2 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| 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 99.5% 441
- Cancelled 0.5% 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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN BWI Denver International Airport – Baltimore/Washington International Thurgood Marshall Airport | 2,394 | 23.7 min | 60.3% | 74 |
| PHX SNA Phoenix Sky Harbor International Airport – John Wayne Orange County International Airport | 544 | 18.6 min | 61.7% | 60 |
| SAT BNA San Antonio International Airport – Nashville International Airport | 1,322 | 21.2 min | 63.8% | 58 |
| PVD TPA Rhode Island T. F. Green International Airport – Tampa International Airport | 1,831 | 3.1 min | 93.0% | 57 |
| LAS SMF Harry Reid International Airport – Sacramento International Airport | 639 | 13.3 min | 72.0% | 50 |
| AUS MCO Austin Bergstrom International Airport – Orlando International Airport | 1,596 | -0.9 min | 91.2% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 75.0% | 0 |
| November 2024 | 21 | 21 | 57.1% | 0 |
| December 2024 | 17 | 17 | 64.7% | 0 |
| January 2025 | 29 | 29 | 69.0% | 0 |
| February 2025 | 28 | 26 | 57.7% | 2 |
| March 2025 | 27 | 27 | 70.4% | 0 |
| April 2025 | 15 | 15 | 53.3% | 0 |
| May 2025 | 15 | 15 | 66.7% | 0 |
| June 2025 | 1 | 1 | 0.0% | 0 |
| August 2025 | 26 | 26 | 92.3% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 26 | 26 | 69.2% | 0 |
| December 2025 | 29 | 29 | 58.6% | 0 |
| January 2026 | 31 | 31 | 74.2% | 0 |
| February 2026 | 34 | 34 | 67.7% | 0 |
| March 2026 | 5 | 5 | 60.0% | 0 |
| April 2026 | 24 | 24 | 70.8% | 0 |
| May 2026 | 31 | 31 | 54.8% | 0 |
| June 2026 | 19 | 19 | 89.5% | 0 |
| July 2026 | 18 | 18 | 94.4% | 0 |