IB 5383 then U2 2326 at Barcelona
Venezia → Barcelona → London Luton
Timetable, Barcelona time
17:10IB 5383 from Venezia at the gate
10:20U2 2326 to London Luton leaves the gate
17 h 10 apart on the timetable, overnight
U2 2326 leaves 17 h 10 after IB 5383 arrives on the timetable: more than half a day, so not a connection we count.