IB 5397 then IB 5136 at Barcelona
London Gatwick → Barcelona → Alicante
Timetable, Barcelona time
12:10IB 5397 from London Gatwick at the gatealso LL 5397, VY 7601, BA 8057
15:25IB 5136 to Alicante leaves the gate
3 h 15 apart on the timetable
The last days
IB 5397 and IB 5136 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.