I2 1760 then U2 7646 at Madrid
Seville → Madrid → Lisbon
Timetable, Madrid time
17:20I2 1760 from Seville at the gatealso IB 1760
21:25U2 7646 to Lisbon leaves the gate
4 h 05 apart on the timetable
The last days
I2 1760 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.