DL 801 then DL 726 at Atlanta
Baltimore → Atlanta → Boston
Timetable, Atlanta time
13:54DL 801 from Baltimore at the gate
13:50DL 726 to Boston leaves the gate
23 h 56 apart on the timetable, overnight
DL 726 leaves 23 h 56 after DL 801 arrives on the timetable: more than half a day, so not a connection we count.