AF 2384 then UA 863 at San Francisco
Boston → San Francisco → Sydney
Timetable, San Francisco time
23:31AF 2384 from Boston at the gatealso DL 2919, SK 3585, LA 6228
23:05UA 863 to Sydney leaves the gatealso LX 3158, VA 8005, LH 9327, NZ 9863
23 h 34 apart on the timetable, overnight
UA 863 leaves 23 h 34 after AF 2384 arrives on the timetable: more than half a day, so not a connection we count.