While the trains are more comfortable, coaches are sometimes more direct; they connect most of the towns and villages in Slovakia and are reliable and satisfactory. The first thing is to check out the timetable where you can find some useful information (time schedule, duration of the journey, prices).
For international bus travel, you can buy tickets at the ticket office or travel agency. Eurolines is the biggest provider operating 8 regular international lines together with its domestic branch Slovak Lines. For international lines operated by Eurobus, it is possible to buy/book a ticket online. RegioJet also provides several international lines.

How to buy a ticket

When travelling by coach within Slovakia, tickets can be bought when boarding. It is possible to buy a ticket with a seat reservation (“miestenka”) for long-distance coaches at the ticket office of any bus station or online in some cases.