BA 482 then FR 7539 at Barcelona
London Heathrow → Barcelona → Milan
Timetable, Barcelona time
14:40BA 482 from London Heathrow at the gate
08:40FR 7539 to Milan leaves the gate
18 h apart on the timetable, overnight
FR 7539 leaves 18 h after BA 482 arrives on the timetable: more than half a day, so not a connection we count.