Aircraft similar to or like McDonnell Douglas DC-9

Series of single-aisle airliners developed by McDonnell Douglas from the earlier DC-9. Launched in October 1977. Wikipedia

Twin-engine, single-aisle jet airliner, developed for the 100-seat market. Designed and originally marketed by McDonnell Douglas as the MD-95, a derivative of the DC-9 family. Wikipedia

Single-aisle airliner developed by McDonnell Douglas from the MD-80, itself derived from the DC-9. Selected, Delta Air Lines became the launch customer on November 14, 1989. Wikipedia

Narrow-body aircraft produced by Boeing at its Renton Factory in Washington. Developed to supplement the Boeing 727 on short and thin routes, the twinjet retains the 707 fuselage cross-section and nose with two underwing turbofans. Wikipedia

The Airbus A320 family are narrow-body airliners designed and produced by Airbus. Launched in March 1984, first flew on 22 February 1987, and was introduced in April 1988 by Air France. Wikipedia

Airliner powered by jet engines . Airliners usually have two or four jet engines; three-engined designs were popular in the 1970s but are less common today. Wikipedia