EC 1703 then IB 325 at Madrid
Nice → Madrid → New York JFK
Timetable, Madrid time
20:40EC 1703 from Nice at the gate
16:20IB 325 to New York JFK leaves the gatealso BA 4269, AY 5655, EI 5857, QR 6905, PC 7705, AA 8837
19 h 40 apart on the timetable, overnight
IB 325 leaves 19 h 40 after EC 1703 arrives on the timetable: more than half a day, so not a connection we count.