IB 834 then FR 572 at Madrid
Athens → Madrid → Porto
Timetable, Madrid time
18:45IB 834 from Athens at the gatealso LA 1649, VY 5175, AT 5305
16:40FR 572 to Porto leaves the gate
21 h 55 apart on the timetable, overnight
FR 572 leaves 21 h 55 after IB 834 arrives on the timetable: more than half a day, so not a connection we count.