OS 553 then FR 2437 at Fiumicino
Vienna → Rome → Madrid
Timetable, Rome time
14:15OS 553 from Vienna at the gate
11:15FR 2437 to Madrid leaves the gate
21 h apart on the timetable, overnight
FR 2437 leaves 21 h after OS 553 arrives on the timetable: more than half a day, so not a connection we count.