WN4229
WN4229 (Southwest Airlines) is a multi-stop service on 18 routes, busiest Tucson to San Diego. Of 434 departures recorded from October 2024 to July 2026, 61.6% left on time, according to the US BTS.
- On-time departures61.6%of 434 flights
- Average delay23.3 min
- July 202631▲ 158.3%vs July 2025
- Cancelled1.6%
- Legs flown under this number18
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 | 19 | 37 | ▲ 94.7% |
| February | 11 | 43 | ▲ 290.9% |
| March | 3 | 48 | ▲ 1,500.0% |
| April | 20 | 23 | ▲ 15.0% |
| May | 25 | 22 | ▼ 12.0% |
| June | 16 | 29 | ▲ 81.3% |
| July | 12 | 31 | ▲ 158.3% |
| August | 3 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 28 | – | – |
| December | 38 | – | – |
| Year to date (Jan–Jul) | 106 | 233 | ▲ 119.8% |
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 | 79.0% | 82.4% | ▲ 4.3% |
| February | 81.8% | 58.1% | ▼ 28.9% |
| March | 66.7% | 51.1% | ▼ 23.4% |
| April | 65.0% | 34.8% | ▼ 46.5% |
| May | 48.0% | 72.7% | ▲ 51.5% |
| June | 56.3% | 46.4% | ▼ 17.5% |
| July | 75.0% | 60.0% | ▼ 20.0% |
| August | 66.7% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 70.4% | – | – |
| December | 47.4% | – | – |
| Year-to-date average (Jan–Jul) | 67.4% | 57.9% | ▼ 14.0% |
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 | 3 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 6 |
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 98.4% 427
- Cancelled 1.6% 7
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 |
|---|---|---|---|---|
| TUS SAN Tucson International Airport – San Diego International Airport | 591 | 20.0 min | 61.4% | 59 |
| AUS SAN Austin Bergstrom International Airport – San Diego International Airport | 1,871 | 4.3 min | 85.7% | 50 |
| DEN SFO Denver International Airport – San Francisco International Airport | 1,553 | 43.4 min | 57.1% | 49 |
| LAX PHX Los Angeles International Airport – Phoenix Sky Harbor International Airport | 595 | 41.8 min | 43.8% | 33 |
| SJC BUR Mineta San Jose International Airport – Hollywood Burbank/Bob Hope Airport | 477 | 14.9 min | 56.3% | 32 |
| LAS SNA Harry Reid International Airport – John Wayne Orange County International Airport | 365 | 10.1 min | 83.9% | 31 |
| DCA AUS Ronald Reagan Washington National Airport – Austin Bergstrom International Airport | 2,114 | 20.1 min | 51.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 15 | 15 | 80.0% | 0 |
| November 2024 | 3 | 3 | 100.0% | 0 |
| December 2024 | 8 | 8 | 100.0% | 0 |
| January 2025 | 19 | 19 | 79.0% | 0 |
| February 2025 | 11 | 11 | 81.8% | 0 |
| March 2025 | 3 | 3 | 66.7% | 0 |
| April 2025 | 20 | 20 | 65.0% | 0 |
| May 2025 | 25 | 25 | 48.0% | 0 |
| June 2025 | 16 | 16 | 56.3% | 0 |
| July 2025 | 12 | 12 | 75.0% | 0 |
| August 2025 | 3 | 3 | 66.7% | 0 |
| November 2025 | 28 | 27 | 70.4% | 1 |
| December 2025 | 38 | 38 | 47.4% | 0 |
| January 2026 | 37 | 34 | 82.4% | 3 |
| February 2026 | 43 | 43 | 58.1% | 0 |
| March 2026 | 48 | 47 | 51.1% | 1 |
| April 2026 | 23 | 23 | 34.8% | 0 |
| May 2026 | 22 | 22 | 72.7% | 0 |
| June 2026 | 29 | 28 | 46.4% | 1 |
| July 2026 | 31 | 30 | 60.0% | 1 |