AIR-CONDITIONED CITY BUSES 1) BMTA air-conditioned buses (cream-blue)cost from 10 to 18 baht, depending on the distance. EURO II buses (yellow-orange),the fares rang from 11 to 23 baht, depending on the distance. 2) Metro Bus (white) is a medium-sized bus using natural gas (CNG). Fares 20,30 or 40 baht depending on the route and bus type. When boarding the bus, you have to drop the fare into the fare box next to the driver.