Douglas DC-9-30

The Douglas DC-9-30 became the most successful DC-9 variant, representing the ideal balance of capacity, range, and economics for short-to-medium-haul operations. Introduced in 1967, it featured a 4.54-meter fuselage stretch to 36.37 meters, seating 100-115 passengers in typical configuration. The DC-9-30 incorporated a wider wingspan (28.47m) for improved efficiency and offered engine options ranging from JT8D-7 (64.5 kN) to JT8D-17 (71.2 kN) for varying performance needs. Airlines valued its operational flexibility—capable of serving both dense short routes and thinner medium-haul markets with a range of 2,778 km (1,500 NM). The variant proved immensely popular, with 662 built for operators worldwide including Eastern Airlines, Ozark Air Lines, and Swissair. The DC-9-30's reliability and low operating costs made it a workhorse for domestic networks throughout the 1970s-1990s. Many were later converted to freighters. The DC-9-30 established the template for subsequent stretched variants including the MD-80 series.