UA 1703 then AA 323 at Miami
San Francisco → Miami → Nashville
Timetable, Miami time
16:49UA 1703 from San Francisco at the gate
16:26AA 323 to Nashville leaves the gate
23 h 37 apart on the timetable, overnight
AA 323 leaves 23 h 37 after UA 1703 arrives on the timetable: more than half a day, so not a connection we count.