WN4201
WN4201 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Oakland to Los Angeles. Of 584 departures recorded from November 2024 to July 2026, 78.1% left on time, according to the US BTS.
- On-time departures78.1%of 584 flights
- Average delay10.2 min
- July 202618▼ 48.6%vs July 2025
- Cancelled0.9%
- Legs flown under this number20
Recorded departures by month
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 | 28 | 26 | ▼ 7.1% |
| February | 30 | 30 | 0.0% |
| March | 6 | 8 | ▲ 33.3% |
| April | 53 | 32 | ▼ 39.6% |
| May | 61 | 38 | ▼ 37.7% |
| June | 42 | 20 | ▼ 52.4% |
| July | 35 | 18 | ▼ 48.6% |
| August | 23 | – | – |
| September | 22 | – | – |
| October | 1 | – | in progress |
| November | 28 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 255 | 172 | ▼ 32.5% |
according to the US BTS · November 2024 → July 2026
On-time departures by month
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 | 100.0% | 64.0% | ▼ 36.0% |
| February | 96.7% | 71.4% | ▼ 26.1% |
| March | 100.0% | 62.5% | ▼ 37.5% |
| April | 86.8% | 90.6% | ▲ 4.4% |
| May | 78.7% | 76.3% | ▼ 3.0% |
| June | 61.0% | 95.0% | ▲ 55.8% |
| July | 48.6% | 94.4% | ▲ 94.4% |
| August | 52.2% | – | – |
| September | 57.1% | – | – |
| October | 100.0% | – | in progress |
| November | 92.9% | – | – |
| December | 64.5% | – | – |
| Year-to-date average (Jan–Jul) | 81.7% | 79.2% | ▼ 3.0% |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 2 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
according to the US BTS · November 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 99.1% 579
- Cancelled 0.9% 5
Share of all recorded flights in the period, all legs. · Nov 3, 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 |
|---|---|---|---|---|
| OAK LAX Oakland San Francisco Bay Airport – Los Angeles International Airport | 543 | -2.9 min | 95.8% | 96 |
| RSW MKE Southwest Florida International Airport – General Mitchell International Airport | 1,908 | 11.5 min | 76.6% | 64 |
| MCO DCA Orlando International Airport – Ronald Reagan Washington National Airport | 1,224 | 2.6 min | 89.7% | 58 |
| SJC SAN Mineta San Jose International Airport – San Diego International Airport | 671 | 5.5 min | 79.6% | 49 |
| DAL BWI Dallas Love Field – Baltimore/Washington International Thurgood Marshall Airport | 1,942 | 20.3 min | 66.7% | 44 |
| SLC PHX Salt Lake City International Airport – Phoenix Sky Harbor International Airport | 818 | 30.4 min | 50.0% | 43 |
| SAN OAK San Diego International Airport – Oakland San Francisco Bay Airport | 718 | 31.2 min | 53.7% | 42 |
| OKC PHX OKC Will Rogers World Airport – Phoenix Sky Harbor International Airport | 1,338 | -0.4 min | 94.1% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 28 | 28 | 89.3% | 0 |
| December 2024 | 24 | 24 | 91.7% | 0 |
| January 2025 | 28 | 28 | 100.0% | 0 |
| February 2025 | 30 | 30 | 96.7% | 0 |
| March 2025 | 6 | 6 | 100.0% | 0 |
| April 2025 | 53 | 53 | 86.8% | 0 |
| May 2025 | 61 | 61 | 78.7% | 0 |
| June 2025 | 42 | 41 | 61.0% | 1 |
| July 2025 | 35 | 35 | 48.6% | 0 |
| August 2025 | 23 | 23 | 52.2% | 0 |
| September 2025 | 22 | 21 | 57.1% | 1 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 28 | 28 | 92.9% | 0 |
| December 2025 | 31 | 31 | 64.5% | 0 |
| January 2026 | 26 | 25 | 64.0% | 1 |
| February 2026 | 30 | 28 | 71.4% | 2 |
| March 2026 | 8 | 8 | 62.5% | 0 |
| April 2026 | 32 | 32 | 90.6% | 0 |
| May 2026 | 38 | 38 | 76.3% | 0 |
| June 2026 | 20 | 20 | 95.0% | 0 |
| July 2026 | 18 | 18 | 94.4% | 0 |