WN1540
WN1540 (Southwest Airlines) is a multi-stop service on 42 routes, busiest Fort Lauderdale to Chicago. Of 769 departures recorded from October 2024 to July 2026, 80.9% left on time, according to the US BTS.
- On-time departures80.9%of 769 flights
- Average delay8.7 min
- July 202666▲ 78.4%vs July 2025
- Cancelled1.4%
- Legs flown under this number42
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 11 | 30 | ▲ 172.7% |
| February | 25 | 28 | ▲ 12.0% |
| March | 20 | 31 | ▲ 55.0% |
| April | 29 | 30 | ▲ 3.4% |
| May | 31 | 31 | 0.0% |
| June | 33 | 51 | ▲ 54.5% |
| July | 37 | 66 | ▲ 78.4% |
| August | 82 | – | – |
| September | 90 | – | – |
| October | 32 | – | in progress |
| November | 19 | – | – |
| December | 15 | – | – |
| Year to date (Jan–Jul) | 186 | 267 | ▲ 43.5% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 90.9% | 92.9% | ▲ 2.1% |
| February | 92.0% | 92.6% | ▲ 0.6% |
| March | 88.9% | 74.2% | ▼ 16.5% |
| April | 86.2% | 73.3% | ▼ 14.9% |
| May | 77.4% | 48.4% | ▼ 37.5% |
| June | 77.4% | 81.6% | ▲ 5.4% |
| July | 88.9% | 87.9% | ▼ 1.1% |
| August | 80.5% | – | – |
| September | 88.9% | – | – |
| October | 46.9% | – | in progress |
| November | 68.4% | – | – |
| December | 80.0% | – | – |
| Year-to-date average (Jan–Jul) | 86.0% | 78.7% | ▼ 8.5% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | 0 | 1 | – |
| March | 2 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 2 | 2 | 0.0% |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 5 | 5 | 0.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 98.6% 758
- Cancelled 1.4% 11
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| FLL MDW Fort Lauderdale Hollywood International Airport – Chicago Midway International Airport | 1,881 | 20.4 min | 56.1% | 57 |
| LAX OAK Los Angeles International Airport – Oakland San Francisco Bay Airport | 543 | 7.8 min | 74.0% | 50 |
| BWI LAX Baltimore/Washington International Thurgood Marshall Airport – Los Angeles International Airport | 3,740 | 3.8 min | 90.9% | 47 |
| BUR PHX Hollywood Burbank/Bob Hope Airport – Phoenix Sky Harbor International Airport | 593 | 0.9 min | 90.0% | 43 |
| COS DEN City of Colorado Springs Municipal Airport – Denver International Airport | 117 | 9.3 min | 83.3% | 42 |
| MCI DAL Kansas City International Airport – Dallas Love Field | 743 | 2.4 min | 92.5% | 41 |
| TUS LAX Tucson International Airport – Los Angeles International Airport | 725 | 4.7 min | 85.0% | 40 |
| SLC BUR Salt Lake City International Airport – Hollywood Burbank/Bob Hope Airport | 923 | 17.3 min | 75.0% | 36 |
| PHX STL Phoenix Sky Harbor International Airport – St. Louis Lambert International Airport | 2,026 | 14.2 min | 75.8% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 27 | 26 | 80.8% | 1 |
| December 2024 | 31 | 31 | 77.4% | 0 |
| January 2025 | 11 | 11 | 90.9% | 0 |
| February 2025 | 25 | 25 | 92.0% | 0 |
| March 2025 | 20 | 18 | 88.9% | 2 |
| April 2025 | 29 | 29 | 86.2% | 0 |
| May 2025 | 31 | 31 | 77.4% | 0 |
| June 2025 | 33 | 31 | 77.4% | 2 |
| July 2025 | 37 | 36 | 88.9% | 1 |
| August 2025 | 82 | 82 | 80.5% | 0 |
| September 2025 | 90 | 90 | 88.9% | 0 |
| October 2025 | 32 | 32 | 46.9% | 0 |
| November 2025 | 19 | 19 | 68.4% | 0 |
| December 2025 | 15 | 15 | 80.0% | 0 |
| January 2026 | 30 | 28 | 92.9% | 2 |
| February 2026 | 28 | 27 | 92.6% | 1 |
| March 2026 | 31 | 31 | 74.2% | 0 |
| April 2026 | 30 | 30 | 73.3% | 0 |
| May 2026 | 31 | 31 | 48.4% | 0 |
| June 2026 | 51 | 49 | 81.6% | 2 |
| July 2026 | 66 | 66 | 87.9% | 0 |