W4 3173 then FR 5356 at Madrid
Bucharest → Madrid → Krakow
Timetable, Madrid time
17:50W4 3173 from Bucharest at the gate
17:00FR 5356 to Krakow leaves the gate
23 h 10 apart on the timetable, overnight
FR 5356 leaves 23 h 10 after W4 3173 arrives on the timetable: more than half a day, so not a connection we count.