UA 3941 then AV 2352 at San Francisco
Washington → San Francisco → Burbank
Timetable, San Francisco time
14:07UA 3941 from Washington at the gate
08:40AV 2352 to Burbank leaves the gate
18 h 33 apart on the timetable, overnight
AV 2352 leaves 18 h 33 after UA 3941 arrives on the timetable: more than half a day, so not a connection we count.