DL 2391 then DL 1720 at Atlanta
Boston → Atlanta → Tampa
Timetable, Atlanta time
16:35DL 2391 from Boston at the gate
13:45DL 1720 to Tampa leaves the gate
21 h 10 apart on the timetable, overnight
DL 1720 leaves 21 h 10 after DL 2391 arrives on the timetable: more than half a day, so not a connection we count.