This line provides service between Phyathai Station to the end terminal at Suvarnabhumi Airport within 30 minutes, which stops at 6 stations along the way such as Rajprarop Station, Makkasan Station, Ramkhamhaeng Station, Hua Mark Station, Thab Chang Station, and Lad Krabang Station. It covers a SA City Line It provides service from 06.00 to 24.00 everyday