FR 3040 then A3 713 at Barcelona
Prague → Barcelona → Athens
Timetable, Barcelona time
22:40FR 3040 from Prague at the gate
20:00A3 713 to Athens leaves the gate
21 h 20 apart on the timetable, overnight
A3 713 leaves 21 h 20 after FR 3040 arrives on the timetable: more than half a day, so not a connection we count.