✔ 最佳答案
If u want to buy the euroline ticket, u can either book it online in the official site of euroline or buy it in the bus station in hungary/budapest.
There are 3 different autobus station for long distance route, but Ersebet ter autobusz-palyaudvar is the only bus station for u to go to czech. It is close to the subway station -Deak Ferenc ter.
If i buy it from the bus station, u better buy it at least 4hrs or 1day before. Sometimes it can be full if u buy the ticket 1hr before departure.
after u bought the ticket, better arrive the bus station 20mins before departure. they check ur ticket and manage ur big size luggage.
hope it help
參考: studied in switzerland for 5 yrs. have been 30 countries in europe.