WN 3091 then UA 6030 at Phoenix
St Louis → Phoenix → San Diego
Timetable, Phoenix time
17:15WN 3091 from St Louis at the gate
16:30UA 6030 to San Diego leaves the gate
23 h 15 apart on the timetable, overnight
UA 6030 leaves 23 h 15 after WN 3091 arrives on the timetable: more than half a day, so not a connection we count.