WN4212
WN4212 (Southwest Airlines) is a multi-stop service on 16 routes, busiest San Diego to Baltimore. Of 302 departures recorded from October 2024 to July 2026, 73.9% left on time, according to the US BTS.
- On-time departures73.9%of 302 flights
- Average delay15.1 min
- July 202627
- Cancelled1.0%
- 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 periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 28 | ▲ 2,700.0% |
| February | 2 | 27 | ▲ 1,250.0% |
| March | 15 | 18 | ▲ 20.0% |
| April | 12 | 21 | ▲ 75.0% |
| May | 9 | 21 | ▲ 133.3% |
| June | 2 | 26 | ▲ 1,200.0% |
| July | – | 27 | – |
| August | 11 | – | – |
| September | 13 | – | – |
| October | – | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
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 | 0.0% | 85.7% | – |
| February | 100.0% | 77.8% | ▼ 22.2% |
| March | 80.0% | 72.2% | ▼ 9.7% |
| April | 91.7% | 38.1% | ▼ 58.4% |
| May | 88.9% | 38.1% | ▼ 57.1% |
| June | 100.0% | 80.8% | ▼ 19.2% |
| July | – | 84.6% | – |
| August | 36.4% | – | – |
| September | 84.6% | – | – |
| October | – | – | in progress |
| November | 82.1% | – | – |
| December | 82.8% | – | – |
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 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 2 | – | – |
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 99.0% 299
- Cancelled 1.0% 3
Share of all recorded flights in the period, all legs. · Oct 15, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SAN BWI San Diego International Airport – Baltimore/Washington International Thurgood Marshall Airport | 3,686 | 7.1 min | 82.3% | 64 |
| SMF DAL Sacramento International Airport – Dallas Love Field | 2,317 | 11.5 min | 83.0% | 53 |
| BDL MDW Bradley International Airport – Chicago Midway International Airport | 1,246 | 5.8 min | 87.8% | 50 |
| SFO DEN San Francisco International Airport – Denver International Airport | 1,553 | 32.3 min | 33.3% | 42 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 66.7% | 0 |
| November 2024 | 2 | 2 | 50.0% | 0 |
| December 2024 | 2 | 2 | 100.0% | 0 |
| January 2025 | 1 | 1 | 0.0% | 0 |
| February 2025 | 2 | 2 | 100.0% | 0 |
| March 2025 | 15 | 15 | 80.0% | 0 |
| April 2025 | 12 | 12 | 91.7% | 0 |
| May 2025 | 9 | 9 | 88.9% | 0 |
| June 2025 | 2 | 2 | 100.0% | 0 |
| August 2025 | 11 | 11 | 36.4% | 0 |
| September 2025 | 13 | 13 | 84.6% | 0 |
| November 2025 | 28 | 28 | 82.1% | 0 |
| December 2025 | 31 | 29 | 82.8% | 2 |
| January 2026 | 28 | 28 | 85.7% | 0 |
| February 2026 | 27 | 27 | 77.8% | 0 |
| March 2026 | 18 | 18 | 72.2% | 0 |
| April 2026 | 21 | 21 | 38.1% | 0 |
| May 2026 | 21 | 21 | 38.1% | 0 |
| June 2026 | 26 | 26 | 80.8% | 0 |
| July 2026 | 27 | 26 | 84.6% | 1 |