UA 582 then AV 2352 at San Francisco
Boston → San Francisco → Burbank
Timetable, San Francisco time
12:09UA 582 from Boston at the gate
07:15AV 2352 to Burbank leaves the gate
19 h 06 apart on the timetable, overnight
AV 2352 leaves 19 h 06 after UA 582 arrives on the timetable: more than half a day, so not a connection we count.