W6 4401 then FR 2766 at Madrid
Sofia → Madrid → Prague
Timetable, Madrid time
19:50W6 4401 from Sofia at the gate
10:05FR 2766 to Prague leaves the gate
14 h 15 apart on the timetable, overnight
FR 2766 leaves 14 h 15 after W6 4401 arrives on the timetable: more than half a day, so not a connection we count.