WN4170
WN4170 (Southwest Airlines) is a multi-stop service on 17 routes, busiest Portland to Chicago. Of 374 departures recorded from October 2024 to July 2026, 71.9% left on time, according to the US BTS.
- On-time departures71.9%of 374 flights
- Average delay16.3 min
- July 202614▼ 63.2%vs July 2025
- Cancelled0.3%
- Legs flown under this number17
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 | – | 32 | – |
| February | – | 31 | – |
| March | – | 32 | – |
| April | 15 | 30 | ▲ 100.0% |
| May | 23 | 31 | ▲ 34.8% |
| June | 36 | 15 | ▼ 58.3% |
| July | 38 | 14 | ▼ 63.2% |
| August | 10 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | 20 | – | – |
| December | 19 | – | – |
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 | – | 65.6% | – |
| February | – | 54.8% | – |
| March | – | 93.6% | – |
| April | 73.3% | 96.7% | ▲ 31.8% |
| May | 43.5% | 96.8% | ▲ 122.6% |
| June | 58.3% | 26.7% | ▼ 54.3% |
| July | 63.2% | 35.7% | ▼ 43.5% |
| August | 80.0% | – | – |
| September | 75.0% | – | – |
| October | – | – | in progress |
| November | 95.0% | – | – |
| December | 89.5% | – | – |
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 | – |
| February | – | 0 | – |
| March | – | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| 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 99.7% 373
- Cancelled 0.3% 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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PDX MDW Portland International Airport – Chicago Midway International Airport | 2,811 | 18.8 min | 56.7% | 60 |
| SAT PHX San Antonio International Airport – Phoenix Sky Harbor International Airport | 1,354 | 8.6 min | 94.8% | 58 |
| DAL LAS Dallas Love Field – Harry Reid International Airport | 1,714 | 17.3 min | 60.0% | 50 |
| PSP SMF Palm Springs International Airport – Sacramento International Airport | 707 | -3.9 min | 97.1% | 34 |
| PHL DEN Philadelphia International Airport – Denver International Airport | 2,501 | 2.5 min | 96.9% | 33 |
| PIT DEN Pittsburgh International Airport – Denver International Airport | 2,071 | 38.9 min | 46.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 2 | 2 | 100.0% | 0 |
| December 2024 | 2 | 2 | 0.0% | 0 |
| April 2025 | 15 | 15 | 73.3% | 0 |
| May 2025 | 23 | 23 | 43.5% | 0 |
| June 2025 | 36 | 36 | 58.3% | 0 |
| July 2025 | 38 | 38 | 63.2% | 0 |
| August 2025 | 10 | 10 | 80.0% | 0 |
| September 2025 | 4 | 4 | 75.0% | 0 |
| November 2025 | 20 | 20 | 95.0% | 0 |
| December 2025 | 19 | 19 | 89.5% | 0 |
| January 2026 | 32 | 32 | 65.6% | 0 |
| February 2026 | 31 | 31 | 54.8% | 0 |
| March 2026 | 32 | 31 | 93.6% | 1 |
| April 2026 | 30 | 30 | 96.7% | 0 |
| May 2026 | 31 | 31 | 96.8% | 0 |
| June 2026 | 15 | 15 | 26.7% | 0 |
| July 2026 | 14 | 14 | 35.7% | 0 |