AC 4345 then AV 2354 at San Francisco
Fresno → San Francisco → Denver
Timetable, San Francisco time
11:25AC 4345 from Fresno at the gatealso UA 5737
05:00AV 2354 to Denver leaves the gate
17 h 35 apart on the timetable, overnight
AV 2354 leaves 17 h 35 after AC 4345 arrives on the timetable: more than half a day, so not a connection we count.