LX 38 then SQ 1491 at San Francisco
Zurich → San Francisco → New York JFK
Timetable, San Francisco time
16:30LX 38 from Zurich at the gatealso UA 9728
06:00SQ 1491 to New York JFK leaves the gate
13 h 30 apart on the timetable, overnight
SQ 1491 leaves 13 h 30 after LX 38 arrives on the timetable: more than half a day, so not a connection we count.