UA 1341 then UA 3911 at San Francisco
Detroit → San Francisco → Denver
Timetable, San Francisco time
19:31UA 1341 from Detroit at the gatealso OZ 9538
17:00UA 3911 to Denver leaves the gate
21 h 29 apart on the timetable, overnight
UA 3911 leaves 21 h 29 after UA 1341 arrives on the timetable: more than half a day, so not a connection we count.