U2 878 then U2 8821 at Gatwick
Saint Helier → London → Krakow
Timetable, London time
18:00U2 878 from Saint Helier at the gate
17:00U2 8821 to Krakow leaves the gate
23 h apart on the timetable, overnight
U2 8821 leaves 23 h after U2 878 arrives on the timetable: more than half a day, so not a connection we count.