A3 721 then EC 3652 at Athens
Lisbon → Athens → Milan
Timetable, Athens time
18:00A3 721 from Lisbon at the gate
11:00EC 3652 to Milan leaves the gate
17 h apart on the timetable, overnight
EC 3652 leaves 17 h after A3 721 arrives on the timetable: more than half a day, so not a connection we count.