OS 644 then FR 4167 at Vienna
Prague → Vienna → Lisbon
Timetable, Vienna time
11:50OS 644 from Prague at the gate
11:25FR 4167 to Lisbon leaves the gate
23 h 35 apart on the timetable, overnight
FR 4167 leaves 23 h 35 after OS 644 arrives on the timetable: more than half a day, so not a connection we count.