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 C is closed for reconstruction. Terminal B is opened in May 2018, it has no direct connection to Aeroexpress train station. Free underground shuttle operate between terminals B and D, E, F (you may be asked to present your boarding pass in order to take it).