WN3975
WN3975 (Southwest Airlines) is a multi-stop service on 30 routes, busiest Phoenix to Ontario. Of 451 departures recorded from October 2024 to July 2026, 72.8% left on time, according to the US BTS.
- On-time departures72.8%of 451 flights
- Average delay16.8 min
- July 20264▼ 95.6%vs July 2025
- Cancelled0.4%
- Legs flown under this number30
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 | 19 | 6 | ▼ 68.4% |
| February | 19 | 15 | ▼ 21.1% |
| March | 32 | 33 | ▲ 3.1% |
| April | 16 | 13 | ▼ 18.8% |
| May | 12 | 11 | ▼ 8.3% |
| June | 88 | 4 | ▼ 95.5% |
| July | 91 | 4 | ▼ 95.6% |
| August | 15 | – | – |
| September | – | – | – |
| October | 29 | – | in progress |
| November | 4 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 277 | 86 | ▼ 69.0% |
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 | 79.0% | 83.3% | ▲ 5.5% |
| February | 79.0% | 53.3% | ▼ 32.5% |
| March | 62.5% | 68.8% | ▲ 10.0% |
| April | 100.0% | 69.2% | ▼ 30.8% |
| May | 91.7% | 81.8% | ▼ 10.7% |
| June | 65.9% | 75.0% | ▲ 13.8% |
| July | 77.8% | 75.0% | ▼ 3.6% |
| August | 80.0% | – | – |
| September | – | – | – |
| October | 75.9% | – | in progress |
| November | 50.0% | – | – |
| December | 50.0% | – | – |
| Year-to-date average (Jan–Jul) | 79.4% | 72.4% | ▼ 8.9% |
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 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 0.0% |
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% 449
- Cancelled 0.4% 2
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 26, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX ONT Phoenix Sky Harbor International Airport – Ontario International Airport | 522 | 17.9 min | 68.6% | 51 |
| MDW PDX Chicago Midway International Airport – Portland International Airport | 2,811 | 20.8 min | 75.0% | 33 |
| HOU PIT William P. Hobby Airport – Pittsburgh International Airport | 1,820 | 18.5 min | 76.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 43.8% | 0 |
| November 2024 | 16 | 16 | 87.5% | 0 |
| December 2024 | 6 | 6 | 83.3% | 0 |
| January 2025 | 19 | 19 | 79.0% | 0 |
| February 2025 | 19 | 19 | 79.0% | 0 |
| March 2025 | 32 | 32 | 62.5% | 0 |
| April 2025 | 16 | 16 | 100.0% | 0 |
| May 2025 | 12 | 12 | 91.7% | 0 |
| June 2025 | 88 | 88 | 65.9% | 0 |
| July 2025 | 91 | 90 | 77.8% | 1 |
| August 2025 | 15 | 15 | 80.0% | 0 |
| October 2025 | 29 | 29 | 75.9% | 0 |
| November 2025 | 4 | 4 | 50.0% | 0 |
| December 2025 | 2 | 2 | 50.0% | 0 |
| January 2026 | 6 | 6 | 83.3% | 0 |
| February 2026 | 15 | 15 | 53.3% | 0 |
| March 2026 | 33 | 32 | 68.8% | 1 |
| April 2026 | 13 | 13 | 69.2% | 0 |
| May 2026 | 11 | 11 | 81.8% | 0 |
| June 2026 | 4 | 4 | 75.0% | 0 |
| July 2026 | 4 | 4 | 75.0% | 0 |