IB 409 then U2 8056 at Barcelona
Madrid → Barcelona → London Gatwick
Timetable, Barcelona time
11:45IB 409 from Madrid at the gatealso LA 1624, CX 1827, LL 3009, VY 5116, AV 6078, BA 7129, QR 7246
14:45U2 8056 to London Gatwick leaves the gate
3 h apart on the timetable
The last days
IB 409 and U2 8056 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.