WN1557
WN1557 (Southwest Airlines) is a multi-stop service on 27 routes, busiest New York to Denver. Of 576 departures recorded from October 2024 to July 2026, 64.2% left on time, according to the US BTS.
- On-time departures64.2%of 576 flights
- Average delay20.4 min
- July 202614▼ 54.8%vs July 2025
- Cancelled0.5%
- Legs flown under this number27
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 | 31 | 30 | ▼ 3.2% |
| February | 28 | 25 | ▼ 10.7% |
| March | 35 | 20 | ▼ 42.9% |
| April | 31 | 25 | ▼ 19.4% |
| May | 32 | 25 | ▼ 21.9% |
| June | 30 | 14 | ▼ 53.3% |
| July | 31 | 14 | ▼ 54.8% |
| August | 29 | – | – |
| September | 30 | – | – |
| October | 35 | – | in progress |
| November | 18 | – | – |
| December | 15 | – | – |
| Year to date (Jan–Jul) | 218 | 153 | ▼ 29.8% |
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 | 70.0% | 43.3% | ▼ 38.1% |
| February | 75.0% | 50.0% | ▼ 33.3% |
| March | 80.0% | 65.0% | ▼ 18.8% |
| April | 64.5% | 84.0% | ▲ 30.2% |
| May | 37.5% | 36.0% | ▼ 4.0% |
| June | 70.0% | 42.9% | ▼ 38.8% |
| July | 77.4% | 14.3% | ▼ 81.5% |
| August | 79.3% | – | – |
| September | 75.9% | – | – |
| October | 68.6% | – | in progress |
| November | 55.6% | – | – |
| December | 60.0% | – | – |
| Year-to-date average (Jan–Jul) | 67.8% | 47.9% | ▼ 29.3% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 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 99.5% 573
- Cancelled 0.5% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LGA DEN LaGuardia Airport – Denver International Airport | 2,600 | 23.0 min | 64.4% | 105 |
| DEN BUR Denver International Airport – Hollywood Burbank/Bob Hope Airport | 1,366 | 22.6 min | 75.4% | 61 |
| MCO MIA Orlando International Airport – Miami International Airport | 310 | 28.1 min | 44.4% | 55 |
| ATL MDW Hartsfield Jackson Atlanta International Airport – Chicago Midway International Airport | 952 | 24.2 min | 57.1% | 49 |
| PHX OMA Phoenix Sky Harbor International Airport – Eppley Airfield | 1,667 | 15.2 min | 73.2% | 42 |
| BUR SJC Hollywood Burbank/Bob Hope Airport – Mineta San Jose International Airport | 477 | 13.9 min | 58.3% | 36 |
| LAS FAT Harry Reid International Airport – Fresno Yosemite International Airport | 416 | 5.4 min | 81.8% | 33 |
| DEN BNA Denver International Airport – Nashville International Airport | 1,628 | 20.4 min | 53.1% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 92.9% | 0 |
| November 2024 | 31 | 31 | 83.9% | 0 |
| December 2024 | 33 | 33 | 54.6% | 0 |
| January 2025 | 31 | 30 | 70.0% | 1 |
| February 2025 | 28 | 28 | 75.0% | 0 |
| March 2025 | 35 | 35 | 80.0% | 0 |
| April 2025 | 31 | 31 | 64.5% | 0 |
| May 2025 | 32 | 32 | 37.5% | 0 |
| June 2025 | 30 | 30 | 70.0% | 0 |
| July 2025 | 31 | 31 | 77.4% | 0 |
| August 2025 | 29 | 29 | 79.3% | 0 |
| September 2025 | 30 | 29 | 75.9% | 1 |
| October 2025 | 35 | 35 | 68.6% | 0 |
| November 2025 | 18 | 18 | 55.6% | 0 |
| December 2025 | 15 | 15 | 60.0% | 0 |
| January 2026 | 30 | 30 | 43.3% | 0 |
| February 2026 | 25 | 24 | 50.0% | 1 |
| March 2026 | 20 | 20 | 65.0% | 0 |
| April 2026 | 25 | 25 | 84.0% | 0 |
| May 2026 | 25 | 25 | 36.0% | 0 |
| June 2026 | 14 | 14 | 42.9% | 0 |
| July 2026 | 14 | 14 | 14.3% | 0 |