WN4640
WN4640 (Southwest Airlines) is a multi-stop service on 11 routes, busiest Fort Lauderdale to Washington. Of 243 departures recorded from November 2024 to July 2026, 80.8% left on time, according to the US BTS.
- On-time departures80.8%of 243 flights
- Average delay7.5 min
- July 20263
- Cancelled1.7%
- Legs flown under this number11
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods14 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 8 | ▲ 700.0% |
| February | – | 18 | – |
| March | – | 29 | – |
| April | 20 | 30 | ▲ 50.0% |
| May | 26 | 31 | ▲ 19.2% |
| June | 4 | 7 | ▲ 75.0% |
| July | – | 3 | – |
| August | – | – | – |
| September | – | – | – |
| October | 30 | – | in progress |
| November | 8 | – | – |
| December | 11 | – | – |
according to the US BTS · November 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 periods14 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 0.0% | 85.7% | – |
| February | – | 94.4% | – |
| March | – | 100.0% | – |
| April | 68.4% | 86.7% | ▲ 26.7% |
| May | 61.5% | 64.5% | ▲ 4.8% |
| June | 75.0% | 100.0% | ▲ 33.3% |
| July | – | 100.0% | – |
| August | – | – | – |
| September | – | – | – |
| October | 96.7% | – | in progress |
| November | 62.5% | – | – |
| December | 45.5% | – | – |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods14 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | – | 0 | – |
| March | – | 1 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
according to the US BTS · November 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 98.4% 239
- Cancelled 1.6% 4
Share of all recorded flights in the period, all legs. · Nov 3, 2024 → Jul 25, 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 |
|---|---|---|---|---|
| FLL DCA Fort Lauderdale Hollywood International Airport – Ronald Reagan Washington National Airport | 1,451 | 11.0 min | 74.1% | 58 |
| PHX DAL Phoenix Sky Harbor International Airport – Dallas Love Field | 1,412 | 20.4 min | 65.3% | 50 |
| BHM BNA Birmingham-Shuttlesworth International Airport – Nashville International Airport | 285 | -4.1 min | 100.0% | 33 |
| DEN SJC Denver International Airport – Mineta San Jose International Airport | 1,522 | -1.8 min | 96.8% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 13 | 12 | 100.0% | 1 |
| December 2024 | 4 | 4 | 75.0% | 0 |
| January 2025 | 1 | 1 | 0.0% | 0 |
| April 2025 | 20 | 19 | 68.4% | 1 |
| May 2025 | 26 | 26 | 61.5% | 0 |
| June 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 30 | 30 | 96.7% | 0 |
| November 2025 | 8 | 8 | 62.5% | 0 |
| December 2025 | 11 | 11 | 45.5% | 0 |
| January 2026 | 8 | 7 | 85.7% | 1 |
| February 2026 | 18 | 18 | 94.4% | 0 |
| March 2026 | 29 | 28 | 100.0% | 1 |
| April 2026 | 30 | 30 | 86.7% | 0 |
| May 2026 | 31 | 31 | 64.5% | 0 |
| June 2026 | 7 | 7 | 100.0% | 0 |
| July 2026 | 3 | 3 | 100.0% | 0 |