Delta Retires Last Commercial Service Douglas DC-9 AircraftMichael BeenerMonday, January 6, 2014Saturday, January 11, 2014 Monday, January 6, 2014Saturday, January 11, 2014 Today, Delta will retire its remaining Douglas DC-9 aircraft following Flight 2014 scheduled to depart Minneapolis/St. Paul for Atlanta at 4:20 p.m. (CST), the last...