There are different "classes" on a bus in Thailand from the economy to VIP bus service. There are bus terminals in all cities on major routes in Thailand.
Surin bus terminal
You can find buses many different flavors. Local buses are very cheap and are suitable for travel between the near cities.
They are uncomfortable and not air conditioned. They also respond to the Thai people who are generally shorter than westerners. Falangs should not expect too much room for legs. If you travel further, then get an air-conditioned bus or VIP - they usually have comfortable seats, a toilet and drinks and snacks available. Thaibus timetables
