B6 615 then UA 1646 at San Francisco
New York JFK → San Francisco → Baltimore
Timetable, San Francisco time
21:37B6 615 from New York JFK at the gatealso EY 8389
21:30UA 1646 to Baltimore leaves the gatealso NZ 9032
23 h 53 apart on the timetable, overnight
UA 1646 leaves 23 h 53 after B6 615 arrives on the timetable: more than half a day, so not a connection we count.