AV 2351 then QF 4397 at San Francisco
Denver → San Francisco → Philadelphia
Timetable, San Francisco time
23:09AV 2351 from Denver at the gate
22:58QF 4397 to Philadelphia leaves the gate
23 h 49 apart on the timetable, overnight
QF 4397 leaves 23 h 49 after AV 2351 arrives on the timetable: more than half a day, so not a connection we count.