AZ 4476 then AV 2354 at San Francisco
Phoenix → San Francisco → Denver
Timetable, San Francisco time
09:12AZ 4476 from Phoenix at the gate
05:00AV 2354 to Denver leaves the gate
19 h 48 apart on the timetable, overnight
AV 2354 leaves 19 h 48 after AZ 4476 arrives on the timetable: more than half a day, so not a connection we count.