WN3531
WN3531 (Southwest Airlines) is a multi-stop service on 31 routes, busiest Kansas City to New York. Of 423 departures recorded from October 2024 to July 2026, 72.3% left on time, according to the US BTS.
- On-time departures72.3%of 423 flights
- Average delay16.4 min
- July 202618▼ 35.7%vs July 2025
- Cancelled0.2%
- Legs flown under this number31
Recorded departures by month
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 | 22 | 5 | ▼ 77.3% |
| February | 9 | 13 | ▲ 44.4% |
| March | 28 | 21 | ▼ 25.0% |
| April | 10 | 24 | ▲ 140.0% |
| May | 5 | 22 | ▲ 340.0% |
| June | 23 | 16 | ▼ 30.4% |
| July | 28 | 18 | ▼ 35.7% |
| August | 30 | – | – |
| September | 30 | – | – |
| October | 27 | – | in progress |
| November | 14 | – | – |
| December | 25 | – | – |
| Year to date (Jan–Jul) | 125 | 119 | ▼ 4.8% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
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 | 77.3% | 40.0% | ▼ 48.2% |
| February | 88.9% | 84.6% | ▼ 4.8% |
| March | 60.7% | 95.2% | ▲ 56.9% |
| April | 60.0% | 70.8% | ▲ 18.0% |
| May | 80.0% | 63.6% | ▼ 20.5% |
| June | 73.9% | 62.5% | ▼ 15.4% |
| July | 50.0% | 72.2% | ▲ 44.4% |
| August | 80.0% | – | – |
| September | 93.3% | – | – |
| October | 65.4% | – | in progress |
| November | 57.1% | – | – |
| December | 56.0% | – | – |
| Year-to-date average (Jan–Jul) | 70.1% | 69.9% | ▼ 0.4% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 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 | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 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 99.8% 422
- Cancelled 0.2% 1
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MCI LGA Kansas City International Airport – LaGuardia Airport | 1,778 | 4.0 min | 89.7% | 58 |
| MDW LAX Chicago Midway International Airport – Los Angeles International Airport | 2,812 | 21.1 min | 59.6% | 52 |
| OAK BUR Oakland San Francisco Bay Airport – Hollywood Burbank/Bob Hope Airport | 523 | 20.8 min | 74.2% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 9 | 9 | 88.9% | 0 |
| November 2024 | 14 | 14 | 85.7% | 0 |
| December 2024 | 30 | 30 | 80.0% | 0 |
| January 2025 | 22 | 22 | 77.3% | 0 |
| February 2025 | 9 | 9 | 88.9% | 0 |
| March 2025 | 28 | 28 | 60.7% | 0 |
| April 2025 | 10 | 10 | 60.0% | 0 |
| May 2025 | 5 | 5 | 80.0% | 0 |
| June 2025 | 23 | 23 | 73.9% | 0 |
| July 2025 | 28 | 28 | 50.0% | 0 |
| August 2025 | 30 | 30 | 80.0% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 27 | 26 | 65.4% | 1 |
| November 2025 | 14 | 14 | 57.1% | 0 |
| December 2025 | 25 | 25 | 56.0% | 0 |
| January 2026 | 5 | 5 | 40.0% | 0 |
| February 2026 | 13 | 13 | 84.6% | 0 |
| March 2026 | 21 | 21 | 95.2% | 0 |
| April 2026 | 24 | 24 | 70.8% | 0 |
| May 2026 | 22 | 22 | 63.6% | 0 |
| June 2026 | 16 | 16 | 62.5% | 0 |
| July 2026 | 18 | 18 | 72.2% | 0 |