↗Bus from Bangkok
Cherdchai Tour lists a Bangkok Mo Chit–Nakhon Ratchasima route. Check the travel date, fare, boarding point and arrival terminal before booking.
Terminal 1 (old) and Terminal 2 (new) are different places. Match the terminal to your ticket and onward journey.
⇄Train: choose the right station
Search the SRT timetable for Nakhon Ratchasima or Thanon Chira Junction. For Pak Chong and Khao Yai, check trains stopping at Pak Chong and arrange the onward journey.
The Bangkok departure station, journey time and fare depend on the train. Check your ticket; not every service leaves from the same station.