WN3983
WN3983 (Southwest Airlines) is a multi-stop service on 22 routes, busiest San Jose to Ontario. Of 476 departures recorded from October 2024 to July 2026, 65.7% left on time, according to the US BTS.
- On-time departures65.7%of 476 flights
- Average delay17.5 min
- July 202620▼ 52.4%vs July 2025
- Cancelled0.8%
- Legs flown under this number22
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 3 | 32 | ▲ 966.7% |
| February | 12 | 35 | ▲ 191.7% |
| March | 24 | 28 | ▲ 16.7% |
| April | 29 | 29 | 0.0% |
| May | 28 | 31 | ▲ 10.7% |
| June | 43 | 23 | ▼ 46.5% |
| July | 42 | 20 | ▼ 52.4% |
| August | 6 | – | – |
| September | – | – | – |
| October | 26 | – | in progress |
| November | 27 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 181 | 198 | ▲ 9.4% |
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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 62.5% | ▼ 37.5% |
| February | 100.0% | 57.1% | ▼ 42.9% |
| March | 78.3% | 42.3% | ▼ 45.9% |
| April | 69.0% | 48.3% | ▼ 30.0% |
| May | 89.3% | 51.6% | ▼ 42.2% |
| June | 44.2% | 87.0% | ▲ 96.8% |
| July | 50.0% | 79.0% | ▲ 57.9% |
| August | 16.7% | – | – |
| September | – | – | – |
| October | 88.5% | – | in progress |
| November | 92.6% | – | – |
| December | 65.5% | – | – |
| Year-to-date average (Jan–Jul) | 75.8% | 61.1% | ▼ 19.4% |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 1 | 2 | ▲ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
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 99.2% 472
- Cancelled 0.8% 4
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SJC ONT Mineta San Jose International Airport – Ontario International Airport | 536 | 7.5 min | 76.7% | 60 |
| PHX BNA Phoenix Sky Harbor International Airport – Nashville International Airport | 2,326 | 34.0 min | 45.0% | 60 |
| RDU BNA Raleigh-Durham International Airport – Nashville International Airport | 710 | 22.0 min | 53.5% | 58 |
| SAN SMF San Diego International Airport – Sacramento International Airport | 773 | 16.4 min | 69.8% | 53 |
| SMF DEN Sacramento International Airport – Denver International Airport | 1,460 | 6.5 min | 87.8% | 49 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 3 | 3 | 66.7% | 0 |
| December 2024 | 3 | 3 | 100.0% | 0 |
| January 2025 | 3 | 3 | 100.0% | 0 |
| February 2025 | 12 | 12 | 100.0% | 0 |
| March 2025 | 24 | 23 | 78.3% | 1 |
| April 2025 | 29 | 29 | 69.0% | 0 |
| May 2025 | 28 | 28 | 89.3% | 0 |
| June 2025 | 43 | 43 | 44.2% | 0 |
| July 2025 | 42 | 42 | 50.0% | 0 |
| August 2025 | 6 | 6 | 16.7% | 0 |
| October 2025 | 26 | 26 | 88.5% | 0 |
| November 2025 | 27 | 27 | 92.6% | 0 |
| December 2025 | 29 | 29 | 65.5% | 0 |
| January 2026 | 32 | 32 | 62.5% | 0 |
| February 2026 | 35 | 35 | 57.1% | 0 |
| March 2026 | 28 | 26 | 42.3% | 2 |
| April 2026 | 29 | 29 | 48.3% | 0 |
| May 2026 | 31 | 31 | 51.6% | 0 |
| June 2026 | 23 | 23 | 87.0% | 0 |
| July 2026 | 20 | 19 | 79.0% | 1 |