UA 1970 then UA 3911 at San Francisco
Cleveland → San Francisco → Denver
Timetable, San Francisco time
21:45UA 1970 from Cleveland at the gatealso VA 8489, NZ 9046, OZ 9526
17:00UA 3911 to Denver leaves the gate
19 h 15 apart on the timetable, overnight
UA 3911 leaves 19 h 15 after UA 1970 arrives on the timetable: more than half a day, so not a connection we count.