Nearly all buses are Karosa type, without air condition, without toilette, only long-distance lines are equipped with somewhat better buses. Buses on longer routes have several stops - be sure to get back on time, while drivers do not check for missing passengers. The same advice about toilettes mentioned in the train paragraph above is valid also for toilettes at the bus stations. On local connection you buy ticket from driver. Passengers with seat reservations are boarded first.
Foreigners usually pay higher fare on int'l lines than Slovak residents.
Antwerpen, Bochum, Brno, Brussel, Breclav, Budapest, Ceske Budejovice, Dortmund, Duisburg, Dusseldorf, Essen, Frankfurt, Gyor, Hainburg, Hradec Kralove, Jindrichuv Hradec, Kaposvar, Katowice, Kittsee, Koln, Krakow, Liege, Lignano, London, Mosonmagyarovar, Munchen, Nurnberg, Ostrava, Paris, Plovdiv, Praha, Prostejov, Reims, Rzeszow, Schwechat, Sofia, Sopron, St. Gallen, Strassbourg, Svitavy, Szombathely, Thessaloniky, Trebon, Udine, Venezia, Vyskov, Wien, Znojmo, Zurich. They operate only few lines, but usually they are more comfortable than CSAD buses. Fare is not high and it is a nice travel. You are not disturbed by the queue on the border. Sept. Foreigners pay higher fare than Slovak residents.