LA 8084 then BA 420 at Heathrow
São Paulo → London → Luxembourg
Timetable, London time
14:05LA 8084 from São Paulo at the gate
14:00BA 420 to Luxembourg leaves the gate
23 h 55 apart on the timetable, overnight
BA 420 leaves 23 h 55 after LA 8084 arrives on the timetable: more than half a day, so not a connection we count.