WN4327
WN4327 (Southwest Airlines) is a multi-stop service on 14 routes, busiest San Jose to Phoenix. Of 388 departures recorded from October 2024 to July 2026, 69.4% left on time, according to the US BTS.
- On-time departures69.4%of 388 flights
- Average delay19.3 min
- July 202617▼ 43.3%vs July 2025
- Cancelled0.5%
- Legs flown under this number14
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 14 | 14 | 0.0% |
| February | 30 | 19 | ▼ 36.7% |
| March | 8 | 2 | ▼ 75.0% |
| April | 24 | – | – |
| May | 32 | – | – |
| June | 30 | 16 | ▼ 46.7% |
| July | 30 | 17 | ▼ 43.3% |
| August | 27 | – | – |
| September | 26 | – | – |
| October | 1 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 85.7% | 69.2% | ▼ 19.2% |
| February | 83.3% | 73.7% | ▼ 11.6% |
| March | 87.5% | 100.0% | ▲ 14.3% |
| April | 79.2% | – | – |
| May | 62.5% | – | – |
| June | 53.3% | 50.0% | ▼ 6.2% |
| July | 53.3% | 76.5% | ▲ 43.4% |
| August | 74.1% | – | – |
| September | 53.9% | – | – |
| October | 100.0% | – | in progress |
| November | 92.6% | – | – |
| December | 64.5% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | – | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 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% 386
- Cancelled 0.5% 2
Share of all recorded flights in the period, all legs. · Oct 14, 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 PHX Mineta San Jose International Airport – Phoenix Sky Harbor International Airport | 999 | 7.9 min | 77.8% | 64 |
| PIT TPA Pittsburgh International Airport – Tampa International Airport | 1,408 | 34.4 min | 53.3% | 60 |
| MCO BNA Orlando International Airport – Nashville International Airport | 993 | 33.2 min | 68.4% | 57 |
| SMF DEN Sacramento International Airport – Denver International Airport | 1,460 | 18.8 min | 64.0% | 50 |
| PDX OAK Portland International Airport – Oakland San Francisco Bay Airport | 876 | 18.0 min | 71.4% | 35 |
| DAL MCI Dallas Love Field – Kansas City International Airport | 743 | 21.9 min | 63.6% | 33 |
| DEN MAF Denver International Airport – Midland International Air and Space Port | 908 | 12.5 min | 72.4% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 7 | 7 | 57.1% | 0 |
| November 2024 | 18 | 18 | 72.2% | 0 |
| December 2024 | 14 | 14 | 71.4% | 0 |
| January 2025 | 14 | 14 | 85.7% | 0 |
| February 2025 | 30 | 30 | 83.3% | 0 |
| March 2025 | 8 | 8 | 87.5% | 0 |
| April 2025 | 24 | 24 | 79.2% | 0 |
| May 2025 | 32 | 32 | 62.5% | 0 |
| June 2025 | 30 | 30 | 53.3% | 0 |
| July 2025 | 30 | 30 | 53.3% | 0 |
| August 2025 | 27 | 27 | 74.1% | 0 |
| September 2025 | 26 | 26 | 53.9% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 28 | 27 | 92.6% | 1 |
| December 2025 | 31 | 31 | 64.5% | 0 |
| January 2026 | 14 | 13 | 69.2% | 1 |
| February 2026 | 19 | 19 | 73.7% | 0 |
| March 2026 | 2 | 2 | 100.0% | 0 |
| June 2026 | 16 | 16 | 50.0% | 0 |
| July 2026 | 17 | 17 | 76.5% | 0 |