U2 2059 then A3 604 at Athens
Manchester → Athens → London Heathrow
Timetable, Athens time
19:30U2 2059 from Manchester at the gate
16:00A3 604 to London Heathrow leaves the gate
20 h 30 apart on the timetable, overnight
A3 604 leaves 20 h 30 after U2 2059 arrives on the timetable: more than half a day, so not a connection we count.