WN4053
WN4053 (Southwest Airlines) is a multi-stop service on 22 routes, busiest San Diego to Nashville. Of 422 departures recorded from October 2024 to July 2026, 79.4% left on time, according to the US BTS.
- On-time departures79.4%of 422 flights
- Average delay7.9 min
- July 202614▼ 72.0%vs July 2025
- Cancelled1.2%
- 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 | 5 | 29 | ▲ 480.0% |
| February | 4 | 38 | ▲ 850.0% |
| March | 2 | 32 | ▲ 1,500.0% |
| April | – | 30 | – |
| May | 1 | 31 | ▲ 3,000.0% |
| June | 46 | 15 | ▼ 67.4% |
| July | 50 | 14 | ▼ 72.0% |
| August | 16 | – | – |
| September | 10 | – | – |
| October | 30 | – | in progress |
| November | 5 | – | – |
| December | 11 | – | – |
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 | 75.0% | 79.3% | ▲ 5.7% |
| February | 75.0% | 63.2% | ▼ 15.8% |
| March | 100.0% | 90.6% | ▼ 9.4% |
| April | – | 93.1% | – |
| May | 100.0% | 86.7% | ▼ 13.3% |
| June | 73.9% | 85.7% | ▲ 16.0% |
| July | 74.0% | 85.7% | ▲ 15.8% |
| August | 87.5% | – | – |
| September | 90.0% | – | – |
| October | 96.7% | – | in progress |
| November | 75.0% | – | – |
| December | 54.6% | – | – |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | – | 1 | – |
| May | 0 | 1 | – |
| June | 0 | 1 | – |
| 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 98.8% 417
- Cancelled 1.2% 5
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SAN BNA San Diego International Airport – Nashville International Airport | 2,812 | -0.5 min | 89.3% | 58 |
| OAK PDX Oakland San Francisco Bay Airport – Portland International Airport | 876 | 4.9 min | 86.3% | 51 |
| PHX HOU Phoenix Sky Harbor International Airport – William P. Hobby Airport | 1,638 | 14.1 min | 68.0% | 50 |
| PDX DAL Portland International Airport – Dallas Love Field | 2,614 | 14.7 min | 65.7% | 35 |
| DAL FLL Dallas Love Field – Fort Lauderdale Hollywood International Airport | 1,780 | 0.5 min | 97.0% | 33 |
| OGG LAS Kahului International Airport – Harry Reid International Airport | 4,334 | -4.3 min | 96.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 15 | 15 | 66.7% | 0 |
| November 2024 | 13 | 13 | 76.9% | 0 |
| December 2024 | 25 | 25 | 68.0% | 0 |
| January 2025 | 5 | 4 | 75.0% | 1 |
| February 2025 | 4 | 4 | 75.0% | 0 |
| March 2025 | 2 | 2 | 100.0% | 0 |
| May 2025 | 1 | 1 | 100.0% | 0 |
| June 2025 | 46 | 46 | 73.9% | 0 |
| July 2025 | 50 | 50 | 74.0% | 0 |
| August 2025 | 16 | 16 | 87.5% | 0 |
| September 2025 | 10 | 10 | 90.0% | 0 |
| October 2025 | 30 | 30 | 96.7% | 0 |
| November 2025 | 5 | 4 | 75.0% | 1 |
| December 2025 | 11 | 11 | 54.6% | 0 |
| January 2026 | 29 | 29 | 79.3% | 0 |
| February 2026 | 38 | 38 | 63.2% | 0 |
| March 2026 | 32 | 32 | 90.6% | 0 |
| April 2026 | 30 | 29 | 93.1% | 1 |
| May 2026 | 31 | 30 | 86.7% | 1 |
| June 2026 | 15 | 14 | 85.7% | 1 |
| July 2026 | 14 | 14 | 85.7% | 0 |