WN4289
WN4289 (Southwest Airlines) is a multi-stop service on 18 routes, busiest San Jose to Las Vegas. Of 502 departures recorded from October 2024 to July 2026, 80.0% left on time, according to the US BTS.
- On-time departures80.0%of 502 flights
- Average delay10.9 min
- July 202627▼ 10.0%vs July 2025
- Cancelled1.2%
- Legs flown under this number18
according to the US BTS · Oct 13, 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 | 8 | 28 | ▲ 250.0% |
| February | 4 | 28 | ▲ 600.0% |
| March | 23 | 26 | ▲ 13.0% |
| April | 21 | 20 | ▼ 4.8% |
| May | 23 | 23 | 0.0% |
| June | 28 | 24 | ▼ 14.3% |
| July | 30 | 27 | ▼ 10.0% |
| August | 39 | – | – |
| September | 38 | – | – |
| October | 31 | – | in progress |
| November | 3 | – | – |
| December | 9 | – | – |
| Year to date (Jan–Jul) | 137 | 176 | ▲ 28.5% |
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 | 62.5% | 85.7% | ▲ 37.1% |
| February | 75.0% | 82.1% | ▲ 9.5% |
| March | 82.6% | 76.2% | ▼ 7.8% |
| April | 85.7% | 85.0% | ▼ 0.8% |
| May | 87.0% | 95.7% | ▲ 10.0% |
| June | 32.1% | 91.7% | ▲ 185.2% |
| July | 56.7% | 92.6% | ▲ 63.4% |
| August | 87.2% | – | – |
| September | 100.0% | – | – |
| October | 83.9% | – | in progress |
| November | 100.0% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Jul) | 68.8% | 87.0% | ▲ 26.4% |
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 | 5 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 5 |
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 98.8% 496
- Cancelled 1.2% 6
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SJC LAS Mineta San Jose International Airport – Harry Reid International Airport | 620 | 0.3 min | 98.3% | 58 |
| DEN COS Denver International Airport – City of Colorado Springs Municipal Airport | 117 | 7.2 min | 84.5% | 58 |
| SEA PHX Seattle–Tacoma International Airport – Phoenix Sky Harbor International Airport | 1,782 | 28.8 min | 41.2% | 51 |
| BNA MCI Nashville International Airport – Kansas City International Airport | 790 | 0.1 min | 92.0% | 50 |
| MDW DCA Chicago Midway International Airport – Ronald Reagan Washington National Airport | 964 | 24.4 min | 63.4% | 42 |
| SLC BWI Salt Lake City International Airport – Baltimore/Washington International Thurgood Marshall Airport | 2,994 | 2.4 min | 92.5% | 40 |
| OAK LGB Oakland San Francisco Bay Airport – Long Beach International Airport | 569 | 7.0 min | 87.5% | 40 |
| PIT FLL Pittsburgh International Airport – Fort Lauderdale Hollywood International Airport | 1,603 | 8.8 min | 83.9% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 87.5% | 0 |
| November 2024 | 33 | 32 | 75.0% | 1 |
| December 2024 | 20 | 20 | 60.0% | 0 |
| January 2025 | 8 | 8 | 62.5% | 0 |
| February 2025 | 4 | 4 | 75.0% | 0 |
| March 2025 | 23 | 23 | 82.6% | 0 |
| April 2025 | 21 | 21 | 85.7% | 0 |
| May 2025 | 23 | 23 | 87.0% | 0 |
| June 2025 | 28 | 28 | 32.1% | 0 |
| July 2025 | 30 | 30 | 56.7% | 0 |
| August 2025 | 39 | 39 | 87.2% | 0 |
| September 2025 | 38 | 38 | 100.0% | 0 |
| October 2025 | 31 | 31 | 83.9% | 0 |
| November 2025 | 3 | 3 | 100.0% | 0 |
| December 2025 | 9 | 9 | 66.7% | 0 |
| January 2026 | 28 | 28 | 85.7% | 0 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 26 | 21 | 76.2% | 5 |
| April 2026 | 20 | 20 | 85.0% | 0 |
| May 2026 | 23 | 23 | 95.7% | 0 |
| June 2026 | 24 | 24 | 91.7% | 0 |
| July 2026 | 27 | 27 | 92.6% | 0 |