BA 486 then LO 4704 at Barcelona
London Heathrow → Barcelona → Lisbon
Timetable, Barcelona time
18:30BA 486 from London Heathrow at the gate
10:55LO 4704 to Lisbon leaves the gate
16 h 25 apart on the timetable, overnight
LO 4704 leaves 16 h 25 after BA 486 arrives on the timetable: more than half a day, so not a connection we count.