WN1536
WN1536 (Southwest Airlines) is a multi-stop service on 38 routes, busiest Salt Lake City to Las Vegas. Of 699 departures recorded from October 2024 to July 2026, 81.6% left on time, according to the US BTS.
- On-time departures81.6%of 699 flights
- Average delay8.4 min
- July 202624▼ 22.6%vs July 2025
- Cancelled0.7%
- Legs flown under this number38
according to the US BTS · Oct 13, 2024 → Jul 29, 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 | 17 | 31 | ▲ 82.4% |
| February | 23 | 28 | ▲ 21.7% |
| March | 34 | 58 | ▲ 70.6% |
| April | 44 | 42 | ▼ 4.5% |
| May | 44 | 39 | ▼ 11.4% |
| June | 33 | 26 | ▼ 21.2% |
| July | 31 | 24 | ▼ 22.6% |
| August | 32 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 27 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 226 | 248 | ▲ 9.7% |
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 | 94.1% | 64.5% | ▼ 31.4% |
| February | 87.0% | 82.1% | ▼ 5.5% |
| March | 91.2% | 66.7% | ▼ 26.9% |
| April | 79.6% | 81.0% | ▲ 1.8% |
| May | 83.7% | 94.7% | ▲ 13.2% |
| June | 84.9% | 80.8% | ▼ 4.8% |
| July | 87.1% | 54.2% | ▼ 37.8% |
| August | 83.9% | – | – |
| September | 90.0% | – | – |
| October | 74.2% | – | in progress |
| November | 70.4% | – | – |
| December | 79.3% | – | – |
| Year-to-date average (Jan–Jul) | 86.8% | 74.9% | ▼ 13.7% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 1 | 1 | 0.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 2 | ▲ 100.0% |
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 99.3% 694
- Cancelled 0.7% 5
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SLC LAS Salt Lake City International Airport – Harry Reid International Airport | 592 | 2.0 min | 95.2% | 64 |
| LAS BUR Harry Reid International Airport – Hollywood Burbank/Bob Hope Airport | 359 | 11.1 min | 85.3% | 61 |
| BUR PHX Hollywood Burbank/Bob Hope Airport – Phoenix Sky Harbor International Airport | 593 | 13.4 min | 72.9% | 59 |
| BOS BWI Boston Logan International Airport – Baltimore/Washington International Thurgood Marshall Airport | 594 | 5.9 min | 86.0% | 58 |
| OAK LGB Oakland San Francisco Bay Airport – Long Beach International Airport | 569 | -2.0 min | 94.6% | 57 |
| LGB SMF Long Beach International Airport – Sacramento International Airport | 624 | 0.1 min | 88.0% | 50 |
| DEN BHM Denver International Airport – Birmingham-Shuttlesworth International Airport | 1,740 | 15.9 min | 70.2% | 47 |
| BOI OAK Boise Air Terminal/Gowen Field – Oakland San Francisco Bay Airport | 823 | -2.4 min | 93.9% | 33 |
| SMF BUR Sacramento International Airport – Hollywood Burbank/Bob Hope Airport | 577 | 9.8 min | 74.2% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 76.5% | 0 |
| November 2024 | 29 | 28 | 100.0% | 1 |
| December 2024 | 30 | 30 | 96.7% | 0 |
| January 2025 | 17 | 17 | 94.1% | 0 |
| February 2025 | 23 | 23 | 87.0% | 0 |
| March 2025 | 34 | 34 | 91.2% | 0 |
| April 2025 | 44 | 44 | 79.6% | 0 |
| May 2025 | 44 | 43 | 83.7% | 1 |
| June 2025 | 33 | 33 | 84.9% | 0 |
| July 2025 | 31 | 31 | 87.1% | 0 |
| August 2025 | 32 | 31 | 83.9% | 1 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 31 | 31 | 74.2% | 0 |
| November 2025 | 27 | 27 | 70.4% | 0 |
| December 2025 | 29 | 29 | 79.3% | 0 |
| January 2026 | 31 | 31 | 64.5% | 0 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 58 | 57 | 66.7% | 1 |
| April 2026 | 42 | 42 | 81.0% | 0 |
| May 2026 | 39 | 38 | 94.7% | 1 |
| June 2026 | 26 | 26 | 80.8% | 0 |
| July 2026 | 24 | 24 | 54.2% | 0 |