WN420
WN420 (Southwest Airlines) is a multi-stop service on 29 routes, busiest Los Angeles to San Francisco. Of 672 departures recorded from October 2024 to July 2026, 83.1% left on time, according to the US BTS.
- On-time departures83.1%of 672 flights
- Average delay7.6 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.3%
- Legs flown under this number29
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 27 | 36 | ▲ 33.3% |
| February | 26 | 28 | ▲ 7.7% |
| March | 27 | 31 | ▲ 14.8% |
| April | 45 | 25 | ▼ 44.4% |
| May | 46 | 27 | ▼ 41.3% |
| June | 34 | 28 | ▼ 17.6% |
| July | 31 | 31 | 0.0% |
| August | 27 | – | – |
| September | 26 | – | – |
| October | 31 | – | in progress |
| November | 38 | – | – |
| December | 44 | – | – |
| Year to date (Jan–Jul) | 236 | 206 | ▼ 12.7% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 96.3% | 77.1% | ▼ 19.9% |
| February | 84.6% | 42.9% | ▼ 49.4% |
| March | 96.3% | 48.4% | ▼ 49.8% |
| April | 95.6% | 72.0% | ▼ 24.7% |
| May | 95.7% | 74.1% | ▼ 22.6% |
| June | 91.2% | 89.3% | ▼ 2.1% |
| July | 90.3% | 93.6% | ▲ 3.6% |
| August | 76.9% | – | – |
| September | 84.6% | – | – |
| October | 71.0% | – | in progress |
| November | 92.1% | – | – |
| December | 97.7% | – | – |
| Year-to-date average (Jan–Jul) | 92.8% | 71.0% | ▼ 23.5% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 1 |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.7% 670
- Cancelled 0.3% 2
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LAX SFO Los Angeles International Airport – San Francisco International Airport | 543 | 4.5 min | 85.0% | 93 |
| ATL MCO Hartsfield Jackson Atlanta International Airport – Orlando International Airport | 651 | 6.0 min | 90.0% | 60 |
| MCO DCA Orlando International Airport – Ronald Reagan Washington National Airport | 1,224 | 20.4 min | 56.1% | 58 |
| TPA BWI Tampa International Airport – Baltimore/Washington International Thurgood Marshall Airport | 1,358 | -4.0 min | 100.0% | 57 |
| BDL BWI Bradley International Airport – Baltimore/Washington International Thurgood Marshall Airport | 455 | -1.8 min | 100.0% | 50 |
| AUS MCO Austin Bergstrom International Airport – Orlando International Airport | 1,596 | 10.8 min | 78.6% | 42 |
| DEN DAL Denver International Airport – Dallas Love Field | 1,048 | 10.0 min | 79.5% | 39 |
| TUL DEN Tulsa International Airport – Denver International Airport | 870 | 0.6 min | 91.7% | 36 |
| BNA LAS Nashville International Airport – Harry Reid International Airport | 2,549 | 28.3 min | 51.5% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 70.0% | 0 |
| November 2024 | 17 | 17 | 100.0% | 0 |
| December 2024 | 27 | 27 | 66.7% | 0 |
| January 2025 | 27 | 27 | 96.3% | 0 |
| February 2025 | 26 | 26 | 84.6% | 0 |
| March 2025 | 27 | 27 | 96.3% | 0 |
| April 2025 | 45 | 45 | 95.6% | 0 |
| May 2025 | 46 | 46 | 95.7% | 0 |
| June 2025 | 34 | 34 | 91.2% | 0 |
| July 2025 | 31 | 31 | 90.3% | 0 |
| August 2025 | 27 | 26 | 76.9% | 1 |
| September 2025 | 26 | 26 | 84.6% | 0 |
| October 2025 | 31 | 31 | 71.0% | 0 |
| November 2025 | 38 | 38 | 92.1% | 0 |
| December 2025 | 44 | 44 | 97.7% | 0 |
| January 2026 | 36 | 35 | 77.1% | 1 |
| February 2026 | 28 | 28 | 42.9% | 0 |
| March 2026 | 31 | 31 | 48.4% | 0 |
| April 2026 | 25 | 25 | 72.0% | 0 |
| May 2026 | 27 | 27 | 74.1% | 0 |
| June 2026 | 28 | 28 | 89.3% | 0 |
| July 2026 | 31 | 31 | 93.6% | 0 |