IB 420 then U2 7646 at Madrid
Barcelona → Madrid → Lisbon
Timetable, Madrid time
20:20IB 420 from Barcelona at the gatealso LA 1586, LL 3020, VY 5090, AV 6153, QR 6895
21:25U2 7646 to Lisbon leaves the gate
1 h 05 apart on the timetable
The last days
IB 420 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.