WN3874
WN3874 (Southwest Airlines) is a multi-stop service on 23 routes, busiest San Diego to Nashville. Of 483 departures recorded from October 2024 to July 2026, 69.7% left on time, according to the US BTS.
- On-time departures69.7%of 483 flights
- Average delay18.0 min
- July 202616▼ 30.4%vs July 2025
- Cancelled0.4%
- Legs flown under this number23
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 | 29 | 4 | ▼ 86.2% |
| February | 26 | 10 | ▼ 61.5% |
| March | 31 | 28 | ▼ 9.7% |
| April | 42 | 6 | ▼ 85.7% |
| May | 48 | 1 | ▼ 97.9% |
| June | 24 | 15 | ▼ 37.5% |
| July | 23 | 16 | ▼ 30.4% |
| August | 20 | – | – |
| September | 21 | – | – |
| October | – | – | in progress |
| November | 17 | – | – |
| December | 16 | – | – |
| Year to date (Jan–Jul) | 223 | 80 | ▼ 64.1% |
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 | 86.2% | 25.0% | ▼ 71.0% |
| February | 96.2% | 90.0% | ▼ 6.4% |
| March | 77.4% | 71.4% | ▼ 7.7% |
| April | 59.5% | 83.3% | ▲ 40.0% |
| May | 66.7% | 100.0% | ▲ 50.0% |
| June | 66.7% | 73.3% | ▲ 10.0% |
| July | 60.9% | 50.0% | ▼ 17.9% |
| August | 70.0% | – | – |
| September | 38.1% | – | – |
| October | – | – | in progress |
| November | 82.4% | – | – |
| December | 62.5% | – | – |
| Year-to-date average (Jan–Jul) | 73.4% | 70.4% | ▼ 4.0% |
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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 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 99.6% 481
- Cancelled 0.4% 2
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 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 | 8.8 min | 87.1% | 117 |
| LAS SLC Harry Reid International Airport – Salt Lake City International Airport | 592 | 22.3 min | 64.9% | 57 |
| MDW PDX Chicago Midway International Airport – Portland International Airport | 2,811 | 20.6 min | 62.8% | 43 |
| OAK LAS Oakland San Francisco Bay Airport – Harry Reid International Airport | 654 | 15.9 min | 67.6% | 37 |
| PHX MCO Phoenix Sky Harbor International Airport – Orlando International Airport | 2,969 | 22.0 min | 72.7% | 33 |
| OAK PHX Oakland San Francisco Bay Airport – Phoenix Sky Harbor International Airport | 1,039 | 32.0 min | 56.3% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 28 | 28 | 67.9% | 0 |
| November 2024 | 43 | 43 | 62.8% | 0 |
| December 2024 | 35 | 33 | 81.8% | 2 |
| January 2025 | 29 | 29 | 86.2% | 0 |
| February 2025 | 26 | 26 | 96.2% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 42 | 42 | 59.5% | 0 |
| May 2025 | 48 | 48 | 66.7% | 0 |
| June 2025 | 24 | 24 | 66.7% | 0 |
| July 2025 | 23 | 23 | 60.9% | 0 |
| August 2025 | 20 | 20 | 70.0% | 0 |
| September 2025 | 21 | 21 | 38.1% | 0 |
| November 2025 | 17 | 17 | 82.4% | 0 |
| December 2025 | 16 | 16 | 62.5% | 0 |
| January 2026 | 4 | 4 | 25.0% | 0 |
| February 2026 | 10 | 10 | 90.0% | 0 |
| March 2026 | 28 | 28 | 71.4% | 0 |
| April 2026 | 6 | 6 | 83.3% | 0 |
| May 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 15 | 15 | 73.3% | 0 |
| July 2026 | 16 | 16 | 50.0% | 0 |