WN3535
WN3535 (Southwest Airlines) is a multi-stop service on 22 routes, busiest Los Angeles to Salt Lake City. Of 523 departures recorded from October 2024 to July 2026, 79.4% left on time, according to the US BTS.
- On-time departures79.4%of 523 flights
- Average delay10.1 min
- July 202616▼ 48.4%vs July 2025
- Cancelled0.6%
- Legs flown under this number22
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 | 26 | 28 | ▲ 7.7% |
| February | 27 | 28 | ▲ 3.7% |
| March | 31 | 27 | ▼ 12.9% |
| April | 24 | 11 | ▼ 54.2% |
| May | 22 | 10 | ▼ 54.5% |
| June | 29 | 15 | ▼ 48.3% |
| July | 31 | 16 | ▼ 48.4% |
| August | 39 | – | – |
| September | 39 | – | – |
| October | 28 | – | in progress |
| November | 33 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 190 | 135 | ▼ 28.9% |
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 | 92.3% | 96.4% | ▲ 4.5% |
| February | 92.6% | 100.0% | ▲ 8.0% |
| March | 87.1% | 42.3% | ▼ 51.4% |
| April | 79.2% | 72.7% | ▼ 8.1% |
| May | 40.9% | 100.0% | ▲ 144.4% |
| June | 62.1% | 46.7% | ▼ 24.8% |
| July | 80.7% | 62.5% | ▼ 22.5% |
| August | 79.5% | – | – |
| September | 84.6% | – | – |
| October | 53.9% | – | in progress |
| November | 100.0% | – | – |
| December | 90.3% | – | – |
| Year-to-date average (Jan–Jul) | 76.4% | 74.4% | ▼ 2.6% |
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 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 2 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
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 99.4% 520
- Cancelled 0.6% 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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAX SLC Los Angeles International Airport – Salt Lake City International Airport | 949 | 13.3 min | 75.0% | 60 |
| SJC LGB Mineta San Jose International Airport – Long Beach International Airport | 522 | -2.9 min | 98.3% | 58 |
| STL MKE St. Louis Lambert International Airport – General Mitchell International Airport | 511 | 5.8 min | 90.0% | 50 |
| BOS DEN Boston Logan International Airport – Denver International Airport | 2,816 | 5.3 min | 82.0% | 50 |
| BWI BNA Baltimore/Washington International Thurgood Marshall Airport – Nashville International Airport | 944 | -1.0 min | 95.7% | 46 |
| LGA STL LaGuardia Airport – St. Louis Lambert International Airport | 1,426 | 25.5 min | 54.8% | 42 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 87.5% | 0 |
| November 2024 | 7 | 7 | 100.0% | 0 |
| December 2024 | 5 | 5 | 100.0% | 0 |
| January 2025 | 26 | 26 | 92.3% | 0 |
| February 2025 | 27 | 27 | 92.6% | 0 |
| March 2025 | 31 | 31 | 87.1% | 0 |
| April 2025 | 24 | 24 | 79.2% | 0 |
| May 2025 | 22 | 22 | 40.9% | 0 |
| June 2025 | 29 | 29 | 62.1% | 0 |
| July 2025 | 31 | 31 | 80.7% | 0 |
| August 2025 | 39 | 39 | 79.5% | 0 |
| September 2025 | 39 | 39 | 84.6% | 0 |
| October 2025 | 28 | 26 | 53.9% | 2 |
| November 2025 | 33 | 33 | 100.0% | 0 |
| December 2025 | 31 | 31 | 90.3% | 0 |
| January 2026 | 28 | 28 | 96.4% | 0 |
| February 2026 | 28 | 28 | 100.0% | 0 |
| March 2026 | 27 | 26 | 42.3% | 1 |
| April 2026 | 11 | 11 | 72.7% | 0 |
| May 2026 | 10 | 10 | 100.0% | 0 |
| June 2026 | 15 | 15 | 46.7% | 0 |
| July 2026 | 16 | 16 | 62.5% | 0 |