IB 5945 then IB 5414 at Barcelona
Strasbourg → Barcelona → London Gatwick
Timetable, Barcelona time
10:15IB 5945 from Strasbourg at the gatealso LL 5945, VY 8145
14:55IB 5414 to London Gatwick leaves the gatealso LL 5414, VY 7618
4 h 40 apart on the timetable
The last days
IB 5945 and IB 5414 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.