BA 510 then FR 1768 at Lisbon
London Heathrow → Lisbon → Valencia
Timetable, Lisbon time
17:45BA 510 from London Heathrow at the gate
14:25FR 1768 to Valencia leaves the gate
20 h 40 apart on the timetable, overnight
FR 1768 leaves 20 h 40 after BA 510 arrives on the timetable: more than half a day, so not a connection we count.