CA 866 then QR 3538 at Madrid
Havana → Madrid → Barcelona
Timetable, Madrid time
15:30CA 866 from Havana at the gate
18:30QR 3538 to Barcelona leaves the gate
3 h apart on the timetable
The last days
CA 866 and QR 3538 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.