UA 1341 then UA 3916 at San Francisco
Detroit → San Francisco → Denver
Timetable, San Francisco time
19:31UA 1341 from Detroit at the gatealso OZ 9538
13:30UA 3916 to Denver leaves the gate
17 h 59 apart on the timetable, overnight
UA 3916 leaves 17 h 59 after UA 1341 arrives on the timetable: more than half a day, so not a connection we count.