CorreiaVr

Hey everyone. So on 27(sunday) of this month (december) i will be catching a plane at timisoara airport at 16.35(romanian time). So any suggestions on how to go from belgrade or from kragujevac to timissoara aiport? Whats would be the best way(train/bus) and where could i buy tickets and check schedules? Also beeing the flight at 16.35 its necessary to be at airport for check-in and everything else at 14.35 romanian time, so would it be manageable to leave serbia on 27 and get to the airport in time? or would be wiser to leave the day before? Thanks in advance!