KL 3379 then UX 91 at Madrid
Lanzarote → Madrid → New York JFK
Timetable, Madrid time
21:00KL 3379 from Lanzarote at the gatealso AF 4837, DL 6773, AM 6823, EY 7580, UX 9076
15:25UX 91 to New York JFK leaves the gatealso DL 6769, RO 9430
18 h 25 apart on the timetable, overnight
UX 91 leaves 18 h 25 after KL 3379 arrives on the timetable: more than half a day, so not a connection we count.