FR 7337 then OS 339 at Vienna
Dublin → Vienna → London Heathrow
Timetable, Vienna time
21:15FR 7337 from Dublin at the gate
20:20OS 339 to London Heathrow leaves the gate
23 h 05 apart on the timetable, overnight
OS 339 leaves 23 h 05 after FR 7337 arrives on the timetable: more than half a day, so not a connection we count.