EC 7682 then DJ 6645 at Lisbon
Barcelona → Lisbon → Porto
Timetable, Lisbon time
23:00EC 7682 from Barcelona at the gate
19:30DJ 6645 to Porto leaves the gate
20 h 30 apart on the timetable, overnight
DJ 6645 leaves 20 h 30 after EC 7682 arrives on the timetable: more than half a day, so not a connection we count.