Long Beach Airport, Lakewood Boulevard, Long Beach, Los Angeles County, California, 90846, United StatesMcDonnell Douglas
Simple Flying[1][3]: "It took its first flight on October 18th 1979, as the DC-9 Super 80. It was certified within the year, receiving approval from the FAA on August 25th 1980"; Wikipedia[2] gives the same date (one Swissair fan page says 7 November).
The first DC-9 Super 80, later called the MD-80, flew for the first time on 18 October 1979 from Long Beach; the stretched, higher-bypass JT8D-200 twinjet was certified on 25 August 1980.