AA 2290 then UA 1506 at Miami
Nashville → Miami → San Francisco
Timetable, Miami time
09:25AA 2290 from Nashville at the gate
09:15UA 1506 to San Francisco leaves the gate
23 h 50 apart on the timetable, overnight
UA 1506 leaves 23 h 50 after AA 2290 arrives on the timetable: more than half a day, so not a connection we count.