B6 248 then CI 5311 at JFK
Las Vegas → New York → Anchorage
Timetable, New York time
23:54B6 248 from Las Vegas at the gate
12:25CI 5311 to Anchorage leaves the gate
12 h 31 apart on the timetable, overnight
CI 5311 leaves 12 h 31 after B6 248 arrives on the timetable: more than half a day, so not a connection we count.