IB 136 then U2 7646 at Madrid
Quito → Madrid → Lisbon
Timetable, Madrid time
10:45IB 136 from Quito at the gate
21:25U2 7646 to Lisbon leaves the gate
10 h 40 apart on the timetable
The last days
IB 136 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.