WN4509
WN4509 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Baltimore to Orlando. Of 398 departures recorded from October 2024 to July 2026, 70.6% left on time, according to the US BTS.
- On-time departures70.6%of 398 flights
- Average delay15.5 min
- July 202625
- Cancelled1.0%
- 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 periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 28 | 2 | ▼ 92.9% |
| February | 24 | – | – |
| March | 30 | 10 | ▼ 66.7% |
| April | 10 | 16 | ▲ 60.0% |
| May | 4 | 18 | ▲ 350.0% |
| June | 1 | 25 | ▲ 2,400.0% |
| July | – | 25 | – |
| August | 26 | – | – |
| September | 30 | – | – |
| October | 19 | – | in progress |
| November | 25 | – | – |
| December | 20 | – | – |
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 | 69.2% | 100.0% | ▲ 44.4% |
| February | 70.8% | – | – |
| March | 55.2% | 33.3% | ▼ 39.6% |
| April | 70.0% | 43.8% | ▼ 37.5% |
| May | 75.0% | 22.2% | ▼ 70.4% |
| June | 100.0% | 92.0% | ▼ 8.0% |
| July | – | 88.0% | – |
| August | 65.4% | – | – |
| September | 90.0% | – | – |
| October | 79.0% | – | in progress |
| November | 96.0% | – | – |
| 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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 0 | ▼ 100.0% |
| February | 0 | – | – |
| March | 1 | 1 | 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 99.0% 394
- Cancelled 1.0% 4
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI MCO Baltimore/Washington International Thurgood Marshall Airport – Orlando International Airport | 1,269 | 17.8 min | 62.9% | 91 |
| SJC SEA Mineta San Jose International Airport – Seattle–Tacoma International Airport | 1,122 | 6.9 min | 79.0% | 57 |
| LGB SLC Long Beach International Airport – Salt Lake City International Airport | 948 | 9.7 min | 91.1% | 45 |
| SAN SJC San Diego International Airport – Mineta San Jose International Airport | 671 | 5.4 min | 87.8% | 41 |
| AUS PHX Austin Bergstrom International Airport – Phoenix Sky Harbor International Airport | 1,401 | 42.9 min | 34.4% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 30 | 30 | 76.7% | 0 |
| November 2024 | 27 | 27 | 74.1% | 0 |
| December 2024 | 28 | 28 | 46.4% | 0 |
| January 2025 | 28 | 26 | 69.2% | 2 |
| February 2025 | 24 | 24 | 70.8% | 0 |
| March 2025 | 30 | 29 | 55.2% | 1 |
| April 2025 | 10 | 10 | 70.0% | 0 |
| May 2025 | 4 | 4 | 75.0% | 0 |
| June 2025 | 1 | 1 | 100.0% | 0 |
| August 2025 | 26 | 26 | 65.4% | 0 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 19 | 19 | 79.0% | 0 |
| November 2025 | 25 | 25 | 96.0% | 0 |
| December 2025 | 20 | 20 | 80.0% | 0 |
| January 2026 | 2 | 2 | 100.0% | 0 |
| March 2026 | 10 | 9 | 33.3% | 1 |
| April 2026 | 16 | 16 | 43.8% | 0 |
| May 2026 | 18 | 18 | 22.2% | 0 |
| June 2026 | 25 | 25 | 92.0% | 0 |
| July 2026 | 25 | 25 | 88.0% | 0 |