FR 7337 then OS 335 at Vienna
Dublin → Vienna → London Heathrow
Timetable, Vienna time
21:15FR 7337 from Dublin at the gate
12:35OS 335 to London Heathrow leaves the gate
15 h 20 apart on the timetable, overnight
OS 335 leaves 15 h 20 after FR 7337 arrives on the timetable: more than half a day, so not a connection we count.