WN4263
WN4263 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Seattle to San Jose. Of 466 departures recorded from October 2024 to July 2026, 76.6% left on time, according to the US BTS.
- On-time departures76.6%of 466 flights
- Average delay13.3 min
- July 202621
- Cancelled1.1%
- Legs flown under this number20
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 34 | 32 | ▼ 5.9% |
| February | 34 | 35 | ▲ 2.9% |
| March | 31 | 4 | ▼ 87.1% |
| April | 7 | 1 | ▼ 85.7% |
| May | – | – | – |
| June | – | 20 | – |
| July | – | 21 | – |
| August | 27 | – | – |
| September | 30 | – | – |
| October | 32 | – | in progress |
| November | 24 | – | – |
| December | 21 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 82.4% | 84.4% | ▲ 2.5% |
| February | 91.2% | 76.5% | ▼ 16.1% |
| March | 80.7% | 50.0% | ▼ 38.0% |
| April | 71.4% | 100.0% | ▲ 40.0% |
| May | – | – | – |
| June | – | 40.0% | – |
| July | – | 36.8% | – |
| August | 55.6% | – | – |
| September | 60.0% | – | – |
| October | 100.0% | – | in progress |
| November | 81.8% | – | – |
| December | 76.2% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | – | – | – |
| June | – | 0 | – |
| July | – | 2 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| 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 98.9% 461
- Cancelled 1.1% 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
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA SJC Seattle–Tacoma International Airport – Mineta San Jose International Airport | 1,122 | 17.3 min | 58.6% | 58 |
| DEN OMA Denver International Airport – Eppley Airfield | 758 | 9.6 min | 78.6% | 57 |
| DTW MDW Detroit Metropolitan Wayne County Airport – Chicago Midway International Airport | 367 | 12.4 min | 81.4% | 45 |
| MDW PHL Chicago Midway International Airport – Philadelphia International Airport | 1,073 | 62.2 min | 38.5% | 41 |
| SMF SAN Sacramento International Airport – San Diego International Airport | 773 | 0.7 min | 94.6% | 37 |
| SAN LAS San Diego International Airport – Harry Reid International Airport | 417 | 8.2 min | 75.8% | 33 |
| HOU LAS William P. Hobby Airport – Harry Reid International Airport | 1,985 | 14.2 min | 75.8% | 33 |
| BWI BOS Baltimore/Washington International Thurgood Marshall Airport – Boston Logan International Airport | 594 | -1.8 min | 100.0% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 68.4% | 0 |
| November 2024 | 36 | 36 | 86.1% | 0 |
| December 2024 | 58 | 58 | 86.2% | 0 |
| January 2025 | 34 | 34 | 82.4% | 0 |
| February 2025 | 34 | 34 | 91.2% | 0 |
| March 2025 | 31 | 31 | 80.7% | 0 |
| April 2025 | 7 | 7 | 71.4% | 0 |
| August 2025 | 27 | 27 | 55.6% | 0 |
| September 2025 | 30 | 30 | 60.0% | 0 |
| October 2025 | 32 | 32 | 100.0% | 0 |
| November 2025 | 24 | 22 | 81.8% | 2 |
| December 2025 | 21 | 21 | 76.2% | 0 |
| January 2026 | 32 | 32 | 84.4% | 0 |
| February 2026 | 35 | 34 | 76.5% | 1 |
| March 2026 | 4 | 4 | 50.0% | 0 |
| April 2026 | 1 | 1 | 100.0% | 0 |
| June 2026 | 20 | 20 | 40.0% | 0 |
| July 2026 | 21 | 19 | 36.8% | 2 |