AZ 4374 then AV 2354 at San Francisco
Portland (Oregon) → San Francisco → Denver
Timetable, San Francisco time
09:07AZ 4374 from Portland (Oregon) at the gatealso CA 7296
05:00AV 2354 to Denver leaves the gate
19 h 53 apart on the timetable, overnight
AV 2354 leaves 19 h 53 after AZ 4374 arrives on the timetable: more than half a day, so not a connection we count.