A3 712 then EC 7694 at Barcelona
Athens → Barcelona → Lisbon
Timetable, Barcelona time
18:45A3 712 from Athens at the gate
15:30EC 7694 to Lisbon leaves the gate
20 h 45 apart on the timetable, overnight
EC 7694 leaves 20 h 45 after A3 712 arrives on the timetable: more than half a day, so not a connection we count.