FR 9481 then OS 439 at Vienna
Cologne → Vienna → Bilbao
Timetable, Vienna time
22:10FR 9481 from Cologne at the gate
15:05OS 439 to Bilbao leaves the gate
16 h 55 apart on the timetable, overnight
OS 439 leaves 16 h 55 after FR 9481 arrives on the timetable: more than half a day, so not a connection we count.