WN 314 then UA 343 at Atlanta
Nashville → Atlanta → San Francisco
Timetable, Atlanta time
19:20WN 314 from Nashville at the gate
17:35UA 343 to San Francisco leaves the gate
22 h 15 apart on the timetable, overnight
UA 343 leaves 22 h 15 after WN 314 arrives on the timetable: more than half a day, so not a connection we count.