FR 2508 then A3 713 at Barcelona
Cologne → Barcelona → Athens
Timetable, Barcelona time
21:45FR 2508 from Cologne at the gate
20:00A3 713 to Athens leaves the gate
22 h 15 apart on the timetable, overnight
A3 713 leaves 22 h 15 after FR 2508 arrives on the timetable: more than half a day, so not a connection we count.