Air-conditioned buses run hourly every day from Bangkok’s North-East Bus Terminal (Mo Chit)
to Khorat (= Nakhon Ratchasima). The bus ride takes between 4 and 4 1/2 hours.
Local buses leave every half hour from Khorat’s (new) bus terminal for Phimai (and on to Chumphuang)
until 10 p.m.