The storm forced U.S. airlines to cancel thousands of flights around the holiday weekend, but Southwest's problems deepened while other airlines largely recovered.
Southwest plans to return to normal flight schedules on Friday, the airline said in a statement, adding it was eager to get back to normal ahead of the New Year holiday weekend.
On a Sept. 27 picket line, she added, one sign read, "Picket line loading, Southwest Airlines technology failure."
The comments echoed those of the Southwest Airlines Pilots Association, which said leadership had failed to adapt operations to address repeated systems failures, despite years of calls for improvements by the union.
The U.S. Transportation Department is investigating the large number of cancelled and delayed Southwest flights in recent days to determine if they were in the airline's control.