Southwest is famous for its quick aircraft turns.
This came about because Lamar had to sell the
carrier's fourth Boeing 737 before delivery to
meet a payroll, yet fly a four aircraft schedule with
three aircraft. Thus was born the famed 10
minute turn -- this before federal rules required
everybody to be in their seats before the door
could be closed and the aircraft could be taxied.
Today, even at 25 minutes, Southwest turns an
aircraft faster than anyone else.