UA 3917 then AC 4432 at San Francisco
Los Angeles → San Francisco → Tucson
Timetable, San Francisco time
19:00UA 3917 from Los Angeles at the gate
18:47AC 4432 to Tucson leaves the gatealso UA 5688, EK 6388, LH 9398, NZ 9747
23 h 47 apart on the timetable, overnight
AC 4432 leaves 23 h 47 after UA 3917 arrives on the timetable: more than half a day, so not a connection we count.