IB 531 then EC 7693 at Lisbon
Madrid → Lisbon → Barcelona
Timetable, Lisbon time
11:50IB 531 from Madrid at the gate
11:55EC 7693 to Barcelona leaves the gate
5 min apart on the timetable
The last days
IB 531 and EC 7693 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.