WN4303
WN4303 (Southwest Airlines) is a multi-stop service on 15 routes, busiest San Jose to Santa Ana. Of 457 departures recorded from October 2024 to July 2026, 73.1% left on time, according to the US BTS.
- On-time departures73.1%of 457 flights
- Average delay17.3 min
- July 202621▲ 23.5%vs July 2025
- Cancelled0.7%
- Legs flown under this number15
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 38 | 3 | ▼ 92.1% |
| February | 31 | – | – |
| March | 37 | – | – |
| April | 29 | – | – |
| May | 26 | – | – |
| June | 20 | 20 | 0.0% |
| July | 17 | 21 | ▲ 23.5% |
| August | 21 | – | – |
| September | 21 | – | – |
| October | 21 | – | in progress |
| November | 15 | – | – |
| December | 25 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 94.6% | 66.7% | ▼ 29.5% |
| February | 96.8% | – | – |
| March | 67.6% | – | – |
| April | 86.2% | – | – |
| May | 73.1% | – | – |
| June | 45.0% | 10.0% | ▼ 77.8% |
| July | 41.2% | 9.5% | ▼ 76.9% |
| August | 76.2% | – | – |
| September | 85.0% | – | – |
| October | 95.2% | – | in progress |
| November | 66.7% | – | – |
| December | 66.7% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | – | – |
| March | 0 | – | – |
| April | 0 | – | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 99.3% 454
- Cancelled 0.7% 3
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SJC SNA Mineta San Jose International Airport – John Wayne Orange County International Airport | 550 | 1.2 min | 94.3% | 107 |
| AUS LBB Austin Bergstrom International Airport – Lubbock Preston Smith International Airport | 550 | 8.0 min | 84.0% | 50 |
| SFO DEN San Francisco International Airport – Denver International Airport | 1,553 | 30.3 min | 65.9% | 42 |
| DEN SFO Denver International Airport – San Francisco International Airport | 1,553 | 70.0 min | 9.8% | 41 |
| SNA DEN John Wayne Orange County International Airport – Denver International Airport | 1,360 | 2.4 min | 91.9% | 37 |
| DAL BNA Dallas Love Field – Nashville International Airport | 1,000 | 35.5 min | 36.1% | 36 |
| BWI GSP Baltimore/Washington International Thurgood Marshall Airport – Greenville-Spartanburg International Airport | 685 | 28.8 min | 60.6% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 84.2% | 0 |
| November 2024 | 32 | 32 | 87.5% | 0 |
| December 2024 | 61 | 61 | 86.9% | 0 |
| January 2025 | 38 | 37 | 94.6% | 1 |
| February 2025 | 31 | 31 | 96.8% | 0 |
| March 2025 | 37 | 37 | 67.6% | 0 |
| April 2025 | 29 | 29 | 86.2% | 0 |
| May 2025 | 26 | 26 | 73.1% | 0 |
| June 2025 | 20 | 20 | 45.0% | 0 |
| July 2025 | 17 | 17 | 41.2% | 0 |
| August 2025 | 21 | 21 | 76.2% | 0 |
| September 2025 | 21 | 20 | 85.0% | 1 |
| October 2025 | 21 | 21 | 95.2% | 0 |
| November 2025 | 15 | 15 | 66.7% | 0 |
| December 2025 | 25 | 24 | 66.7% | 1 |
| January 2026 | 3 | 3 | 66.7% | 0 |
| June 2026 | 20 | 20 | 10.0% | 0 |
| July 2026 | 21 | 21 | 9.5% | 0 |