WN4132
WN4132 (Southwest Airlines) is a multi-stop service on 24 routes, busiest Ontario to Baltimore. Of 450 departures recorded from October 2024 to July 2026, 76.8% left on time, according to the US BTS.
- On-time departures76.8%of 450 flights
- Average delay10.7 min
- July 202627▼ 12.9%vs July 2025
- Cancelled0.2%
- Legs flown under this number24
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 | 3 | 6 | ▲ 100.0% |
| February | 12 | – | – |
| March | 24 | 51 | ▲ 112.5% |
| April | 26 | 33 | ▲ 26.9% |
| May | 28 | 26 | ▼ 7.1% |
| June | 29 | 26 | ▼ 10.3% |
| July | 31 | 27 | ▼ 12.9% |
| August | 27 | – | – |
| September | 26 | – | – |
| October | 26 | – | in progress |
| November | 7 | – | – |
| December | 13 | – | – |
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 | 100.0% | 66.7% | ▼ 33.3% |
| February | 100.0% | – | – |
| March | 73.9% | 82.4% | ▲ 11.4% |
| April | 84.6% | 72.7% | ▼ 14.1% |
| May | 85.7% | 53.9% | ▼ 37.2% |
| June | 62.1% | 65.4% | ▲ 5.3% |
| July | 77.4% | 74.1% | ▼ 4.3% |
| August | 81.5% | – | – |
| September | 92.3% | – | – |
| October | 96.2% | – | in progress |
| November | 57.1% | – | – |
| December | 61.5% | – | – |
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 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 | 0 | – |
| 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 99.8% 449
- Cancelled 0.2% 1
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| ONT BWI Ontario International Airport – Baltimore/Washington International Thurgood Marshall Airport | 3,666 | 13.2 min | 68.9% | 61 |
| SAN SMF San Diego International Airport – Sacramento International Airport | 773 | 20.8 min | 58.0% | 50 |
| PIT MDW Pittsburgh International Airport – Chicago Midway International Airport | 646 | 3.8 min | 88.0% | 50 |
| PHX MCO Phoenix Sky Harbor International Airport – Orlando International Airport | 2,969 | 5.0 min | 88.0% | 50 |
| LAS PDX Harry Reid International Airport – Portland International Airport | 1,227 | 12.5 min | 69.1% | 42 |
| SJC ONT Mineta San Jose International Airport – Ontario International Airport | 536 | -2.4 min | 93.9% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 23 | 23 | 65.2% | 0 |
| November 2024 | 4 | 4 | 100.0% | 0 |
| December 2024 | 2 | 2 | 100.0% | 0 |
| January 2025 | 3 | 3 | 100.0% | 0 |
| February 2025 | 12 | 12 | 100.0% | 0 |
| March 2025 | 24 | 23 | 73.9% | 1 |
| April 2025 | 26 | 26 | 84.6% | 0 |
| May 2025 | 28 | 28 | 85.7% | 0 |
| June 2025 | 29 | 29 | 62.1% | 0 |
| July 2025 | 31 | 31 | 77.4% | 0 |
| August 2025 | 27 | 27 | 81.5% | 0 |
| September 2025 | 26 | 26 | 92.3% | 0 |
| October 2025 | 26 | 26 | 96.2% | 0 |
| November 2025 | 7 | 7 | 57.1% | 0 |
| December 2025 | 13 | 13 | 61.5% | 0 |
| January 2026 | 6 | 6 | 66.7% | 0 |
| March 2026 | 51 | 51 | 82.4% | 0 |
| April 2026 | 33 | 33 | 72.7% | 0 |
| May 2026 | 26 | 26 | 53.9% | 0 |
| June 2026 | 26 | 26 | 65.4% | 0 |
| July 2026 | 27 | 27 | 74.1% | 0 |