B6 1097 then DL 598 at Atlanta
Boston → Atlanta → Cancún
Timetable, Atlanta time
11:06B6 1097 from Boston at the gate
11:02DL 598 to Cancún leaves the gate
23 h 56 apart on the timetable, overnight
DL 598 leaves 23 h 56 after B6 1097 arrives on the timetable: more than half a day, so not a connection we count.