WN4272
WN4272 (Southwest Airlines) is a multi-stop service on 13 routes, busiest Chicago to Portland. Of 271 departures recorded from October 2024 to July 2026, 73.3% left on time, according to the US BTS.
- On-time departures73.3%of 271 flights
- Average delay14.0 min
- July 202627
- Cancelled0.4%
- Legs flown under this number13
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 | 6 | 3 | ▼ 50.0% |
| February | 4 | 10 | ▲ 150.0% |
| March | 1 | 1 | 0.0% |
| April | 3 | 52 | ▲ 1,633.3% |
| May | 4 | 62 | ▲ 1,450.0% |
| June | 1 | 30 | ▲ 2,900.0% |
| July | – | 27 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 5 | – | – |
| December | 11 | – | – |
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 | 83.3% | 100.0% | ▲ 20.0% |
| February | 50.0% | 50.0% | 0.0% |
| March | 0.0% | 100.0% | – |
| April | 66.7% | 82.7% | ▲ 24.0% |
| May | 25.0% | 88.7% | ▲ 254.8% |
| June | 0.0% | 51.7% | – |
| July | – | 25.9% | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 80.0% | – | – |
| December | 81.8% | – | – |
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 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| 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 99.6% 270
- Cancelled 0.4% 1
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MDW PWM Chicago Midway International Airport – Portland International Jetport | 1,437 | 41.4 min | 30.6% | 50 |
| SNA LAS John Wayne Orange County International Airport – Harry Reid International Airport | 365 | 7.3 min | 85.4% | 48 |
| HOU DEN William P. Hobby Airport – Denver International Airport | 1,422 | 7.9 min | 80.4% | 46 |
| SJC SNA Mineta San Jose International Airport – John Wayne Orange County International Airport | 550 | -1.7 min | 96.8% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 15 | 15 | 100.0% | 0 |
| November 2024 | 20 | 20 | 85.0% | 0 |
| December 2024 | 16 | 16 | 87.5% | 0 |
| January 2025 | 6 | 6 | 83.3% | 0 |
| February 2025 | 4 | 4 | 50.0% | 0 |
| March 2025 | 1 | 1 | 0.0% | 0 |
| April 2025 | 3 | 3 | 66.7% | 0 |
| May 2025 | 4 | 4 | 25.0% | 0 |
| June 2025 | 1 | 1 | 0.0% | 0 |
| November 2025 | 5 | 5 | 80.0% | 0 |
| December 2025 | 11 | 11 | 81.8% | 0 |
| January 2026 | 3 | 3 | 100.0% | 0 |
| February 2026 | 10 | 10 | 50.0% | 0 |
| March 2026 | 1 | 1 | 100.0% | 0 |
| April 2026 | 52 | 52 | 82.7% | 0 |
| May 2026 | 62 | 62 | 88.7% | 0 |
| June 2026 | 30 | 29 | 51.7% | 1 |
| July 2026 | 27 | 27 | 25.9% | 0 |