WN4270
WN4270 (Southwest Airlines) is a multi-stop service on 26 routes, busiest San Jose to Santa Ana. Of 438 departures recorded from October 2024 to July 2026, 72.3% left on time, according to the US BTS.
- On-time departures72.3%of 438 flights
- Average delay12.6 min
- July 202630▼ 6.3%vs July 2025
- Cancelled0.5%
- Legs flown under this number26
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 | 23 | 23 | 0.0% |
| February | 18 | 27 | ▲ 50.0% |
| March | 50 | 15 | ▼ 70.0% |
| April | 14 | 26 | ▲ 85.7% |
| May | 2 | 30 | ▲ 1,400.0% |
| June | 26 | 30 | ▲ 15.4% |
| July | 32 | 30 | ▼ 6.3% |
| August | 4 | – | – |
| September | – | – | – |
| October | 26 | – | in progress |
| November | 3 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 165 | 181 | ▲ 9.7% |
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 | 90.5% | 82.6% | ▼ 8.7% |
| February | 83.3% | 66.7% | ▼ 20.0% |
| March | 76.0% | 66.7% | ▼ 12.3% |
| April | 92.9% | 92.3% | ▼ 0.6% |
| May | 100.0% | 100.0% | 0.0% |
| June | 57.7% | 40.0% | ▼ 30.7% |
| July | 50.0% | 43.3% | ▼ 13.3% |
| August | 50.0% | – | – |
| September | – | – | – |
| October | 84.6% | – | in progress |
| November | 66.7% | – | – |
| December | 100.0% | – | – |
| Year-to-date average (Jan–Jul) | 78.6% | 70.2% | ▼ 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 periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 0 | ▼ 100.0% |
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 99.5% 436
- Cancelled 0.5% 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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SJC SNA Mineta San Jose International Airport – John Wayne Orange County International Airport | 550 | -5.0 min | 98.3% | 57 |
| LAS OAK Harry Reid International Airport – Oakland San Francisco Bay Airport | 654 | 30.9 min | 38.6% | 57 |
| LAS MDW Harry Reid International Airport – Chicago Midway International Airport | 2,442 | 10.0 min | 73.6% | 53 |
| PHX RNO Phoenix Sky Harbor International Airport – Reno Tahoe International Airport | 967 | 17.7 min | 65.1% | 43 |
| DAL BUR Dallas Love Field – Hollywood Burbank/Bob Hope Airport | 1,996 | 4.1 min | 90.0% | 42 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 47 | 47 | 78.7% | 0 |
| November 2024 | 6 | 6 | 66.7% | 0 |
| December 2024 | 4 | 4 | 50.0% | 0 |
| January 2025 | 23 | 21 | 90.5% | 2 |
| February 2025 | 18 | 18 | 83.3% | 0 |
| March 2025 | 50 | 50 | 76.0% | 0 |
| April 2025 | 14 | 14 | 92.9% | 0 |
| May 2025 | 2 | 2 | 100.0% | 0 |
| June 2025 | 26 | 26 | 57.7% | 0 |
| July 2025 | 32 | 32 | 50.0% | 0 |
| August 2025 | 4 | 4 | 50.0% | 0 |
| October 2025 | 26 | 26 | 84.6% | 0 |
| November 2025 | 3 | 3 | 66.7% | 0 |
| December 2025 | 2 | 2 | 100.0% | 0 |
| January 2026 | 23 | 23 | 82.6% | 0 |
| February 2026 | 27 | 27 | 66.7% | 0 |
| March 2026 | 15 | 15 | 66.7% | 0 |
| April 2026 | 26 | 26 | 92.3% | 0 |
| May 2026 | 30 | 30 | 100.0% | 0 |
| June 2026 | 30 | 30 | 40.0% | 0 |
| July 2026 | 30 | 30 | 43.3% | 0 |