FR 3613 then IB 379 at Madrid
Prague → Madrid → San Juan
Timetable, Madrid time
18:10FR 3613 from Prague at the gate
16:00IB 379 to San Juan leaves the gate
21 h 50 apart on the timetable, overnight
IB 379 leaves 21 h 50 after FR 3613 arrives on the timetable: more than half a day, so not a connection we count.