IB 5423 then VY 1306 at Barcelona
London Heathrow → Barcelona → Alicante
Timetable, Barcelona time
13:10IB 5423 from London Heathrow at the gatealso LL 5423, VY 7641, BA 8083
12:40VY 1306 to Alicante leaves the gatealso QR 3537, IB 5132, LL 5132
23 h 30 apart on the timetable, overnight
VY 1306 leaves 23 h 30 after IB 5423 arrives on the timetable: more than half a day, so not a connection we count.