Line 14 (Onyx) (Portuguese: Linha 14–Ônix), formerly called the Airport Express, is a planned line of the Companhia Paulista de Trens Metropolitanos commuter rail system in São Paulo, Brazil which would originally connect the São Paulo-Guarulhos International Airport to Brás Station. The line was planned to have an average interval of six minutes between each station. Although the State Government says that the current plan is to finish the constructions in progress, some preliminary details were revealed about the stations and character of the line.