LA 6139 then DL 8939 at San Francisco
Boston → San Francisco → Phoenix
Timetable, San Francisco time
00:24LA 6139 from Boston at the gate
23:00DL 8939 to Phoenix leaves the gate
22 h 36 apart on the timetable
DL 8939 leaves 22 h 36 after LA 6139 arrives on the timetable: more than half a day, so not a connection we count.