EC 1703 then AM 20 at Madrid
Nice → Madrid → Mexico City
Timetable, Madrid time
20:40EC 1703 from Nice at the gate
13:30AM 20 to Mexico City leaves the gate
16 h 50 apart on the timetable, overnight
AM 20 leaves 16 h 50 after EC 1703 arrives on the timetable: more than half a day, so not a connection we count.