U2 802 then U2 819 at Gatwick
Belfast City → London → Belfast International
Timetable, London time
11:45U2 802 from Belfast City at the gate
08:35U2 819 to Belfast International leaves the gate
20 h 50 apart on the timetable, overnight
U2 819 leaves 20 h 50 after U2 802 arrives on the timetable: more than half a day, so not a connection we count.