BA 694 then FR 9857 at Vienna
London Heathrow → Vienna → Helsinki
Timetable, Vienna time
13:30BA 694 from London Heathrow at the gate
11:15FR 9857 to Helsinki leaves the gate
21 h 45 apart on the timetable, overnight
FR 9857 leaves 21 h 45 after BA 694 arrives on the timetable: more than half a day, so not a connection we count.