UA 230 then B6 316 at San Francisco
Baltimore → San Francisco → New York JFK
Timetable, San Francisco time
11:10UA 230 from Baltimore at the gatealso VA 8063, NZ 9035
08:05B6 316 to New York JFK leaves the gatealso LO 5774, EY 8328, AT 9559
20 h 55 apart on the timetable, overnight
B6 316 leaves 20 h 55 after UA 230 arrives on the timetable: more than half a day, so not a connection we count.