Concourse A (which has 47 gates) composes the eastern part of the closest midfield terminal building. It consists of a permanent ground level set of gates designed for small planes and regional jets used by United Express, and several former Concourse B gates. The concourse is primarily used for international flights. Air France operates an airline lounge opposite gate A22, Etihad Airways operates a First and Business Class lounge across from gate A15, and Virgin Atlantic has a Clubhouse lounge across from gate A32. Concourse A's AeroTrain station is located about halfway through the concourse, between gates A6 and A14.