WN3852
WN3852 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Baltimore to Chicago. Of 433 departures recorded from October 2024 to July 2026, 67.0% left on time, according to the US BTS.
- On-time departures67.0%of 433 flights
- Average delay16.3 min
- July 20269▼ 71.0%vs July 2025
- Cancelled0.7%
- Legs flown under this number20
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 | 3 | 9 | ▲ 200.0% |
| February | – | – | – |
| March | 22 | 27 | ▲ 22.7% |
| April | 42 | 30 | ▼ 28.6% |
| May | 53 | 31 | ▼ 41.5% |
| June | 31 | 10 | ▼ 67.7% |
| July | 31 | 9 | ▼ 71.0% |
| August | 4 | – | – |
| September | – | – | – |
| October | 29 | – | in progress |
| November | 33 | – | – |
| December | 49 | – | – |
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 | 33.3% | 22.2% | ▼ 33.3% |
| February | – | – | – |
| March | 95.5% | 96.3% | ▲ 0.9% |
| April | 71.4% | 96.7% | ▲ 35.3% |
| May | 56.6% | 93.6% | ▲ 65.3% |
| June | 51.6% | 40.0% | ▼ 22.5% |
| July | 60.7% | 11.1% | ▼ 81.7% |
| August | 75.0% | – | – |
| September | – | – | – |
| October | 82.8% | – | in progress |
| November | 60.6% | – | – |
| December | 36.7% | – | – |
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 periods16 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | – | – | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 3 | 0 | ▼ 100.0% |
| 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 99.3% 430
- Cancelled 0.7% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI MDW Baltimore/Washington International Thurgood Marshall Airport – Chicago Midway International Airport | 981 | 26.8 min | 52.6% | 60 |
| MSY PHX Louis Armstrong New Orleans International Airport – Phoenix Sky Harbor International Airport | 2,088 | 24.2 min | 55.9% | 59 |
| DEN SNA Denver International Airport – John Wayne Orange County International Airport | 1,360 | 1.3 min | 94.8% | 58 |
| CLT BNA Charlotte Douglas International Airport – Nashville International Airport | 528 | 22.4 min | 51.3% | 39 |
| STL DEN St. Louis Lambert International Airport – Denver International Airport | 1,236 | 1.3 min | 97.0% | 33 |
| BWI CLT Baltimore/Washington International Thurgood Marshall Airport – Charlotte Douglas International Airport | 581 | 7.3 min | 81.3% | 32 |
| LAS BNA Harry Reid International Airport – Nashville International Airport | 2,549 | 14.1 min | 83.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 4 | 4 | 100.0% | 0 |
| November 2024 | 5 | 5 | 100.0% | 0 |
| December 2024 | 11 | 11 | 72.7% | 0 |
| January 2025 | 3 | 3 | 33.3% | 0 |
| March 2025 | 22 | 22 | 95.5% | 0 |
| April 2025 | 42 | 42 | 71.4% | 0 |
| May 2025 | 53 | 53 | 56.6% | 0 |
| June 2025 | 31 | 31 | 51.6% | 0 |
| July 2025 | 31 | 28 | 60.7% | 3 |
| August 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 29 | 29 | 82.8% | 0 |
| November 2025 | 33 | 33 | 60.6% | 0 |
| December 2025 | 49 | 49 | 36.7% | 0 |
| January 2026 | 9 | 9 | 22.2% | 0 |
| March 2026 | 27 | 27 | 96.3% | 0 |
| April 2026 | 30 | 30 | 96.7% | 0 |
| May 2026 | 31 | 31 | 93.6% | 0 |
| June 2026 | 10 | 10 | 40.0% | 0 |
| July 2026 | 9 | 9 | 11.1% | 0 |