IB 1152 then U2 7646 at Madrid
Porto → Madrid → Lisbon
Timetable, Madrid time
18:55IB 1152 from Porto at the gatealso LA 1758, CX 1856, QR 5057, VY 5764
21:25U2 7646 to Lisbon leaves the gate
2 h 30 apart on the timetable
The last days
IB 1152 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.