WN4989
WN4989 (Southwest Airlines) is a multi-stop service on 9 routes, busiest Denver to St Louis. Of 221 departures recorded from October 2024 to July 2026, 90.0% left on time, according to the US BTS.
- On-time departures90.0%of 221 flights
- Average delay2.7 min
- July 202618
- Cancelled0.5%
- Legs flown under this number9
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods11 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 27 | 26 | ▼ 3.7% |
| February | 28 | 35 | ▲ 25.0% |
| March | 13 | 5 | ▼ 61.5% |
| April | 2 | – | – |
| May | – | – | – |
| June | – | 16 | – |
| July | – | 18 | – |
| August | – | – | – |
| September | – | – | – |
| October | 4 | – | in progress |
| November | 1 | – | – |
| December | – | – | – |
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 periods11 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 88.5% | 92.3% | ▲ 4.4% |
| February | 96.4% | 85.7% | ▼ 11.1% |
| March | 76.9% | 100.0% | ▲ 30.0% |
| April | 50.0% | – | – |
| May | – | – | – |
| June | – | 93.8% | – |
| July | – | 94.4% | – |
| August | – | – | – |
| September | – | – | – |
| October | 25.0% | – | in progress |
| November | 100.0% | – | – |
| December | – | – | – |
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 periods11 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | – | – |
| May | – | – | – |
| June | – | 0 | – |
| July | – | 0 | – |
| August | – | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | – | – | – |
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 99.5% 220
- Cancelled 0.5% 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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN STL Denver International Airport – St. Louis Lambert International Airport | 1,236 | 2.3 min | 93.1% | 103 |
| SAN OAK San Diego International Airport – Oakland San Francisco Bay Airport | 718 | -1.3 min | 91.4% | 58 |
| ABQ LAX Albuquerque International Sunport – Los Angeles International Airport | 1,088 | 2.9 min | 94.1% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 23 | 23 | 100.0% | 0 |
| December 2024 | 20 | 20 | 90.0% | 0 |
| January 2025 | 27 | 26 | 88.5% | 1 |
| February 2025 | 28 | 28 | 96.4% | 0 |
| March 2025 | 13 | 13 | 76.9% | 0 |
| April 2025 | 2 | 2 | 50.0% | 0 |
| October 2025 | 4 | 4 | 25.0% | 0 |
| November 2025 | 1 | 1 | 100.0% | 0 |
| January 2026 | 26 | 26 | 92.3% | 0 |
| February 2026 | 35 | 35 | 85.7% | 0 |
| March 2026 | 5 | 5 | 100.0% | 0 |
| June 2026 | 16 | 16 | 93.8% | 0 |
| July 2026 | 18 | 18 | 94.4% | 0 |