The Ninth Avenue station opened on June 24, 1916, along with the first portion of the BMT West End Line from 36th Street on the BMT Fourth Avenue Line to 18th Avenue station. The line was originally a surface excursion railway to Coney Island, called the Brooklyn, Bath and Coney Island Railroad, which was established in 1862, but did not reach Coney Island until 1864. Under the Dual Contracts of 1913, an elevated line was built over New Utrecht Avenue, 86th Street and Stillwell Avenue.