U2 2259 then U2 2644 at Keflavík
Manchester → Reykjavík → London Luton
Timetable, Reykjavík time
19:20U2 2259 from Manchester at the gate
10:05U2 2644 to London Luton leaves the gate
14 h 45 apart on the timetable, overnight
U2 2644 leaves 14 h 45 after U2 2259 arrives on the timetable: more than half a day, so not a connection we count.