WN4555
WN4555 (Southwest Airlines) is a multi-stop service on 13 routes, busiest Portland to Phoenix. Of 274 departures recorded from October 2024 to July 2026, 73.3% left on time, according to the US BTS.
- On-time departures73.3%of 274 flights
- Average delay14.2 min
- July 20269
- 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 periods13 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 32 | ▲ 3,100.0% |
| February | – | 28 | – |
| March | – | 27 | – |
| April | 20 | 6 | ▼ 70.0% |
| May | 26 | – | – |
| June | 4 | 7 | ▲ 75.0% |
| July | – | 9 | – |
| August | – | – | – |
| September | – | – | – |
| October | 17 | – | in progress |
| November | 40 | – | – |
| December | 35 | – | – |
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 periods13 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 78.1% | ▼ 21.9% |
| February | – | 89.3% | – |
| March | – | 77.8% | – |
| April | 75.0% | 83.3% | ▲ 11.1% |
| May | 50.0% | – | – |
| June | 75.0% | 100.0% | ▲ 33.3% |
| July | – | 88.9% | – |
| August | – | – | – |
| September | – | – | – |
| October | 47.1% | – | in progress |
| November | 69.2% | – | – |
| December | 71.4% | – | – |
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 periods13 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | – | 0 | – |
| March | – | 0 | – |
| April | 0 | 0 | – |
| May | 0 | – | – |
| June | 0 | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| 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% 273
- Cancelled 0.4% 1
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 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 |
|---|---|---|---|---|
| PDX PHX Portland International Airport – Phoenix Sky Harbor International Airport | 1,625 | 5.8 min | 87.9% | 58 |
| MDW CVG Chicago Midway International Airport – Cincinnati Northern Kentucky International Airport | 401 | 22.4 min | 62.0% | 50 |
| IND HOU Indianapolis International Airport – William P. Hobby Airport | 1,387 | 15.8 min | 75.6% | 46 |
| BNA IND Nashville International Airport – Indianapolis International Airport | 401 | 15.6 min | 70.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 80.0% | 0 |
| November 2024 | 2 | 2 | 50.0% | 0 |
| January 2025 | 1 | 1 | 100.0% | 0 |
| April 2025 | 20 | 20 | 75.0% | 0 |
| May 2025 | 26 | 26 | 50.0% | 0 |
| June 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 17 | 17 | 47.1% | 0 |
| November 2025 | 40 | 39 | 69.2% | 1 |
| December 2025 | 35 | 35 | 71.4% | 0 |
| January 2026 | 32 | 32 | 78.1% | 0 |
| February 2026 | 28 | 28 | 89.3% | 0 |
| March 2026 | 27 | 27 | 77.8% | 0 |
| April 2026 | 6 | 6 | 83.3% | 0 |
| June 2026 | 7 | 7 | 100.0% | 0 |
| July 2026 | 9 | 9 | 88.9% | 0 |