U2 802 then U2 8873 at Gatwick
Belfast City → London → Bordeaux
Timetable, London time
20:55U2 802 from Belfast City at the gate
14:55U2 8873 to Bordeaux leaves the gate
18 h apart on the timetable, overnight
U2 8873 leaves 18 h after U2 802 arrives on the timetable: more than half a day, so not a connection we count.