UA 3875 then UA 1367 at San Francisco
IAB → San Francisco → Burbank
Timetable, San Francisco time
01:46UA 3875 from IAB at the gate
20:43UA 1367 to Burbank leaves the gatealso CM 1448, AC 4396
18 h 57 apart on the timetable
UA 1367 leaves 18 h 57 after UA 3875 arrives on the timetable: more than half a day, so not a connection we count.