GQ 231 then A3 602 at Athens
Mykonos → Athens → London Heathrow
Timetable, Athens time
19:05GQ 231 from Mykonos at the gate
13:25A3 602 to London Heathrow leaves the gate
18 h 20 apart on the timetable, overnight
A3 602 leaves 18 h 20 after GQ 231 arrives on the timetable: more than half a day, so not a connection we count.