LA 6139 then WN 574 at San Francisco
Boston → San Francisco → Nashville
Timetable, San Francisco time
23:58LA 6139 from Boston at the gate
22:50WN 574 to Nashville leaves the gate
22 h 52 apart on the timetable, overnight
WN 574 leaves 22 h 52 after LA 6139 arrives on the timetable: more than half a day, so not a connection we count.