UA 889 then AV 2354 at San Francisco
Beijing → San Francisco → Denver
Timetable, San Francisco time
14:50UA 889 from Beijing at the gatealso CA 7205
05:00AV 2354 to Denver leaves the gate
14 h 10 apart on the timetable, overnight
AV 2354 leaves 14 h 10 after UA 889 arrives on the timetable: more than half a day, so not a connection we count.