TP 1351 then EC 7667 at Lisbon
London Heathrow → Lisbon → Luxembourg
Timetable, Lisbon time
11:05TP 1351 from London Heathrow at the gate
06:20EC 7667 to Luxembourg leaves the gate
19 h 15 apart on the timetable, overnight
EC 7667 leaves 19 h 15 after TP 1351 arrives on the timetable: more than half a day, so not a connection we count.