Sheremetyevo is Russian home to SkyTeam alliance: Aeroflot, Air France, KLM, Alitalia, Delta and other members.
Airport has two group of terminals, situated on opposite sides of the landing strip. Terminals D, E, F are the major ones. They connected to each other and Aeroexpress Rail Terminal by pedestrian galleries. Terminal A is for business aviation. Terminal B is closed for reconstruction. Terminal C handles flights of low-cost carriers and charter airlines. Those terminals have no direct connection to Aeroexpress train station. Free shuttle buses operate between terminals B, C and D, E, F (you will be asked to present your boarding pass to ride the bus).