JU 8510 then UA 406 at San Francisco
New York JFK → San Francisco → Las Vegas
Timetable, San Francisco time
23:54JU 8510 from New York JFK at the gate
21:10UA 406 to Las Vegas leaves the gatealso AC 4025, LH 8940, NZ 9229
21 h 16 apart on the timetable, overnight
UA 406 leaves 21 h 16 after JU 8510 arrives on the timetable: more than half a day, so not a connection we count.