DL 977 then WN 2500 at San Francisco
Boston → San Francisco → Nashville
Timetable, San Francisco time
11:41DL 977 from Boston at the gate
11:35WN 2500 to Nashville leaves the gate
23 h 54 apart on the timetable, overnight
WN 2500 leaves 23 h 54 after DL 977 arrives on the timetable: more than half a day, so not a connection we count.