WN4316
WN4316 (Southwest Airlines) is a multi-stop service on 13 routes, busiest Baltimore to San Diego. Of 390 departures recorded from October 2024 to July 2026, 76.9% left on time, according to the US BTS.
- On-time departures76.9%of 390 flights
- Average delay9.9 min
- July 202623
- Cancelled0.3%
- Legs flown under this number13
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 11 | 37 | ▲ 236.4% |
| February | 15 | 28 | ▲ 86.7% |
| March | 27 | 5 | ▼ 81.5% |
| April | 25 | 27 | ▲ 8.0% |
| May | 28 | 35 | ▲ 25.0% |
| June | 2 | 22 | ▲ 1,000.0% |
| July | – | 23 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 18 | – | – |
| December | 15 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 50.0% | 86.5% | ▲ 73.0% |
| February | 53.3% | 67.9% | ▲ 27.2% |
| March | 100.0% | 60.0% | ▼ 40.0% |
| April | 80.0% | 70.4% | ▼ 12.0% |
| May | 82.1% | 77.1% | ▼ 6.1% |
| June | 100.0% | 95.5% | ▼ 4.5% |
| July | – | 91.3% | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 83.3% | – | – |
| December | 80.0% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| 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 99.7% 389
- Cancelled 0.3% 1
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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI SAN Baltimore/Washington International Thurgood Marshall Airport – San Diego International Airport | 3,686 | 20.4 min | 61.3% | 81 |
| SMF BOI Sacramento International Airport – Boise Air Terminal/Gowen Field | 703 | 7.2 min | 75.4% | 57 |
| OMA MDW Eppley Airfield – Chicago Midway International Airport | 679 | -0.4 min | 92.9% | 42 |
| OMA LAS Eppley Airfield – Harry Reid International Airport | 1,765 | 9.6 min | 82.1% | 39 |
| ATL PHX Hartsfield Jackson Atlanta International Airport – Phoenix Sky Harbor International Airport | 2,549 | 9.5 min | 74.4% | 39 |
| SJC BUR Mineta San Jose International Airport – Hollywood Burbank/Bob Hope Airport | 477 | 10.2 min | 82.9% | 35 |
| OGG HNL Kahului International Airport – Daniel K. Inouye International Airport | 162 | -3.4 min | 96.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 52.9% | 0 |
| November 2024 | 27 | 27 | 70.4% | 0 |
| December 2024 | 28 | 28 | 60.7% | 0 |
| January 2025 | 11 | 10 | 50.0% | 1 |
| February 2025 | 15 | 15 | 53.3% | 0 |
| March 2025 | 27 | 27 | 100.0% | 0 |
| April 2025 | 25 | 25 | 80.0% | 0 |
| May 2025 | 28 | 28 | 82.1% | 0 |
| June 2025 | 2 | 2 | 100.0% | 0 |
| November 2025 | 18 | 18 | 83.3% | 0 |
| December 2025 | 15 | 15 | 80.0% | 0 |
| January 2026 | 37 | 37 | 86.5% | 0 |
| February 2026 | 28 | 28 | 67.9% | 0 |
| March 2026 | 5 | 5 | 60.0% | 0 |
| April 2026 | 27 | 27 | 70.4% | 0 |
| May 2026 | 35 | 35 | 77.1% | 0 |
| June 2026 | 22 | 22 | 95.5% | 0 |
| July 2026 | 23 | 23 | 91.3% | 0 |