I flew that weekend (9/11 occured on a Tuesday). By then displaced paxs had gotten home (in those days there were much more flights to handle irregular operations.) Took a USAir Express flight from LGA to BWI with one other pax. The USAir terminal at LGA was like a ghost town. Then a BWI to TPA Metrojet flight (the one time USAir attempt at a lcc) and there were three paxs onboard a 737.
All of the FAs on the Metrojet flight had just gotten their layoff notice that day, Metrojet was soon abandonded afterwards by USAir.