Flight
SWA3521 21 Aug 2026
SWA3521, operated by Southwest Airlines, on 21 Aug 2026. Scheduled and actual times are local to each airport (hover for UTC).
Flightestimated
PlaneTrack receiver network| Route | KSTL LAMBERT ST LOUIS INTERNATIONAL → ? |
| Status | Completed (receiver network) |
| First seen airborne | 15:17 CDT |
| Last seen | 21:36Z |
| Duration | 1h 18m |
| Aircraft | N442WN |
| Max altitude | 39,000 ft |
Punctuality, last 30 days
| Flights | 6 |
| On time | 4 (67%) |
| Average delay | -203 min |
| Worst delay | +81 min |
In the last 30 days SWA3521 departed on time (within 15 minutes) on 4 of 6 flights (67%), with an average departure delay of -203 min and a worst delay of +81 min.
Schedule, departure and arrival times from the FAA SWIM feed; aircraft, altitude and distance from the PlaneTrack receiver network. On time means a departure within 15 minutes of schedule.