U2 8010 then U2 8183 at Gatwick
Valencia → London → Athens
Timetable, London time
13:40U2 8010 from Valencia at the gate
13:15U2 8183 to Athens leaves the gate
23 h 35 apart on the timetable, overnight
U2 8183 leaves 23 h 35 after U2 8010 arrives on the timetable: more than half a day, so not a connection we count.