OS 402 then FR 729 at Vienna
Barcelona → Vienna → London Stansted
Timetable, Vienna time
12:10OS 402 from Barcelona at the gate
10:10FR 729 to London Stansted leaves the gate
22 h apart on the timetable, overnight
FR 729 leaves 22 h after OS 402 arrives on the timetable: more than half a day, so not a connection we count.