IB 416 then U2 7646 at Madrid
Barcelona → Madrid → Lisbon
Timetable, Madrid time
18:25IB 416 from Barcelona at the gatealso LL 3016, VY 5068, QR 6587, BA 7083, CZ 7325, AA 8732
21:25U2 7646 to Lisbon leaves the gate
3 h apart on the timetable
The last days
IB 416 and U2 7646 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.