AA 4104 then UA 6030 at Phoenix
Denver → Phoenix → San Diego
Timetable, Phoenix time
16:50AA 4104 from Denver at the gate
16:30UA 6030 to San Diego leaves the gate
23 h 40 apart on the timetable, overnight
UA 6030 leaves 23 h 40 after AA 4104 arrives on the timetable: more than half a day, so not a connection we count.