WN3843
WN3843 (Southwest Airlines) is a multi-stop service on 21 routes, busiest Las Vegas to San Diego. Of 576 departures recorded from October 2024 to July 2026, 64.4% left on time, according to the US BTS.
- On-time departures64.4%of 576 flights
- Average delay19.3 min
- July 202634▲ 9.7%vs July 2025
- Cancelled1.6%
- Legs flown under this number21
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 17 | 29 | ▲ 70.6% |
| February | 17 | 35 | ▲ 105.9% |
| March | 53 | 32 | ▼ 39.6% |
| April | 36 | 40 | ▲ 11.1% |
| May | 31 | 44 | ▲ 41.9% |
| June | 30 | 35 | ▲ 16.7% |
| July | 31 | 34 | ▲ 9.7% |
| August | 24 | – | – |
| September | 21 | – | – |
| October | 30 | – | in progress |
| November | 5 | – | – |
| December | 11 | – | – |
| Year to date (Jan–Jul) | 215 | 249 | ▲ 15.8% |
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 periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 68.8% | 89.3% | ▲ 29.9% |
| February | 52.9% | 51.4% | ▼ 2.9% |
| March | 76.0% | 65.6% | ▼ 13.6% |
| April | 52.8% | 55.0% | ▲ 4.2% |
| May | 64.5% | 45.5% | ▼ 29.6% |
| June | 60.0% | 45.5% | ▼ 24.2% |
| July | 65.5% | 41.2% | ▼ 37.1% |
| August | 95.8% | – | – |
| September | 95.2% | – | – |
| October | 76.7% | – | in progress |
| November | 100.0% | – | – |
| December | 90.9% | – | – |
| Year-to-date average (Jan–Jul) | 62.9% | 56.2% | ▼ 10.7% |
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 periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 3 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 2 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 6 | 3 | ▼ 50.0% |
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 98.4% 567
- Cancelled 1.6% 9
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
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAS SAN Harry Reid International Airport – San Diego International Airport | 417 | 23.4 min | 55.2% | 58 |
| AUS DEN Austin Bergstrom International Airport – Denver International Airport | 1,249 | 10.9 min | 71.9% | 58 |
| LAS DEN Harry Reid International Airport – Denver International Airport | 1,009 | 36.2 min | 45.5% | 57 |
| MDW LGA Chicago Midway International Airport – LaGuardia Airport | 1,164 | 22.8 min | 66.0% | 52 |
| BWI SRQ Baltimore/Washington International Thurgood Marshall Airport – Sarasota Bradenton International Airport | 1,419 | 29.0 min | 57.1% | 42 |
| SBA OAK Santa Barbara Municipal Airport – Oakland San Francisco Bay Airport | 424 | 1.0 min | 95.0% | 40 |
| SJU MCO Luis Munoz Marin International Airport – Orlando International Airport | 1,913 | 14.2 min | 60.6% | 33 |
| PHX HNL Phoenix Sky Harbor International Airport – Daniel K. Inouye International Airport | 4,689 | 12.8 min | 77.4% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 68.4% | 0 |
| November 2024 | 2 | 2 | 100.0% | 0 |
| January 2025 | 17 | 16 | 68.8% | 1 |
| February 2025 | 17 | 17 | 52.9% | 0 |
| March 2025 | 53 | 50 | 76.0% | 3 |
| April 2025 | 36 | 36 | 52.8% | 0 |
| May 2025 | 31 | 31 | 64.5% | 0 |
| June 2025 | 30 | 30 | 60.0% | 0 |
| July 2025 | 31 | 29 | 65.5% | 2 |
| August 2025 | 24 | 24 | 95.8% | 0 |
| September 2025 | 21 | 21 | 95.2% | 0 |
| October 2025 | 30 | 30 | 76.7% | 0 |
| November 2025 | 5 | 5 | 100.0% | 0 |
| December 2025 | 11 | 11 | 90.9% | 0 |
| January 2026 | 29 | 28 | 89.3% | 1 |
| February 2026 | 35 | 35 | 51.4% | 0 |
| March 2026 | 32 | 32 | 65.6% | 0 |
| April 2026 | 40 | 40 | 55.0% | 0 |
| May 2026 | 44 | 44 | 45.5% | 0 |
| June 2026 | 35 | 33 | 45.5% | 2 |
| July 2026 | 34 | 34 | 41.2% | 0 |