BA 673 then AI 130 at Heathrow
Thessaloniki → London → Mumbai
Timetable, London time
21:45BA 673 from Thessaloniki at the gate
20:30AI 130 to Mumbai leaves the gate
22 h 45 apart on the timetable, overnight
AI 130 leaves 22 h 45 after BA 673 arrives on the timetable: more than half a day, so not a connection we count.