OS 246 then FR 731 at Vienna
Cologne → Vienna → London Stansted
Timetable, Vienna time
11:10OS 246 from Cologne at the gate
09:40FR 731 to London Stansted leaves the gate
22 h 30 apart on the timetable, overnight
FR 731 leaves 22 h 30 after OS 246 arrives on the timetable: more than half a day, so not a connection we count.