WN4016
WN4016 (Southwest Airlines) is a multi-stop service on 27 routes, busiest Portland to Chicago. Of 503 departures recorded from October 2024 to July 2026, 71.3% left on time, according to the US BTS.
- On-time departures71.3%of 503 flights
- Average delay18.6 min
- July 202616▲ 60.0%vs July 2025
- Cancelled0.4%
- Legs flown under this number27
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 | 2 | 28 | ▲ 1,300.0% |
| February | – | 28 | – |
| March | 50 | 27 | ▼ 46.0% |
| April | 39 | 18 | ▼ 53.8% |
| May | 34 | 18 | ▼ 47.1% |
| June | 11 | 17 | ▲ 54.5% |
| July | 10 | 16 | ▲ 60.0% |
| August | 27 | – | – |
| September | 30 | – | – |
| October | 18 | – | in progress |
| November | 37 | – | – |
| December | 53 | – | – |
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 | 0.0% | 85.7% | – |
| February | – | 50.0% | – |
| March | 63.3% | 51.9% | ▼ 18.0% |
| April | 59.0% | 72.2% | ▲ 22.5% |
| May | 64.7% | 88.2% | ▲ 36.4% |
| June | 63.6% | 70.6% | ▲ 10.9% |
| July | 80.0% | 75.0% | ▼ 6.3% |
| August | 88.9% | – | – |
| September | 83.3% | – | – |
| October | 33.3% | – | in progress |
| November | 94.6% | – | – |
| December | 71.7% | – | – |
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 | 0 | 0 | – |
| February | – | 0 | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | 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% 501
- Cancelled 0.4% 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 |
|---|---|---|---|---|
| PDX MDW Portland International Airport – Chicago Midway International Airport | 2,811 | 6.3 min | 89.8% | 59 |
| PHX ATL Phoenix Sky Harbor International Airport – Hartsfield Jackson Atlanta International Airport | 2,549 | 4.7 min | 86.2% | 58 |
| IND DAL Indianapolis International Airport – Dallas Love Field | 1,215 | 19.3 min | 73.7% | 57 |
| SFO LAS San Francisco International Airport – Harry Reid International Airport | 665 | 15.4 min | 69.4% | 36 |
| TPA DCA Tampa International Airport – Ronald Reagan Washington National Airport | 1,312 | 8.4 min | 71.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 88.2% | 0 |
| November 2024 | 17 | 17 | 88.2% | 0 |
| December 2024 | 6 | 6 | 66.7% | 0 |
| January 2025 | 2 | 2 | 0.0% | 0 |
| March 2025 | 50 | 49 | 63.3% | 1 |
| April 2025 | 39 | 39 | 59.0% | 0 |
| May 2025 | 34 | 34 | 64.7% | 0 |
| June 2025 | 11 | 11 | 63.6% | 0 |
| July 2025 | 10 | 10 | 80.0% | 0 |
| August 2025 | 27 | 27 | 88.9% | 0 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 18 | 18 | 33.3% | 0 |
| November 2025 | 37 | 37 | 94.6% | 0 |
| December 2025 | 53 | 53 | 71.7% | 0 |
| January 2026 | 28 | 28 | 85.7% | 0 |
| February 2026 | 28 | 28 | 50.0% | 0 |
| March 2026 | 27 | 27 | 51.9% | 0 |
| April 2026 | 18 | 18 | 72.2% | 0 |
| May 2026 | 18 | 17 | 88.2% | 1 |
| June 2026 | 17 | 17 | 70.6% | 0 |
| July 2026 | 16 | 16 | 75.0% | 0 |