Southern Airways also served Huntsville. In the late 1960s Southern introduced 75-seat Douglas DC-9-10s into their fleet which had consisted of 40-seat Martin 4-0-4. Southern's timetable in September 1968 listed nonstop jets to Atlanta, Memphis, New Orleans and Muscle Shoals, AL; Southern was still flying Martin 4-0-4s from Huntsville. In April 1975 Southern DC-9s flew nonstop to Atlanta, Chattanooga, Memphis, Montgomery, Muscle Shoals, Nashville, New Orleans and Orlando. Southern had direct DC-9s to New York City (LaGuardia Airport), Washington, D,C. (Dulles Airport), Denver, St. Louis, Detroit and Wichita. In 1979 Southern merged with North Central Airlines to form Republic Airlines which continued to serve Huntsville, by that time having dropped Chattanooga and Montgomery service and having added Greenville/Spartanburg and Mobile/Pascagoula service. Republic was acquired by Northwest Airlines which later merged with Delta Air Lines.