Southwest pulled Flight 4013 from service after a ground equipment vehicle hit the aircraft during boarding Sunday at Memphis International Airport; no injuries were reported.
Passengers were moved to an alternate plane, and the flight left nearly four hours late, with scheduled arrival pushed to about 5:30 p.m. from 1:50 p.m.
Southwest said the replacement aircraft would operate the route to Dallas, though its website listed Flight 4013 as continuing to Harry Reid International Airport near Las Vegas.
Memphis airport called it an isolated incident, while Southwest said the contact will be reviewed under its Safety Management System.