Bangkok Mass Transit System (BTS) Skytrain is the elevated metro rail in Bangkok. The Skytrain has 23 stations along 2 lines. The Sukhumvit line runs north terminating at Mo Chit and east, terminating at On Nut. The Silom line runs along Silom and Sathon, through the Central Business District, terminating at the National Stadium. The lines interchange at Siam station
Single journey tickets are priced based on distance (10 to 40 baht) and are available at ticket machines located in every station. The machines only accept coins and do give change. You may also get exact change at any ticket office located at the station