LX 17 then U2 6842 at Zurich
New York JFK → Zurich → Porto
Timetable, Zurich time
06:15LX 17 from New York JFK at the gate
21:40U2 6842 to Porto leaves the gate
15 h 25 apart on the timetable
U2 6842 leaves 15 h 25 after LX 17 arrives on the timetable: more than half a day, so not a connection we count.