F9 3511 then DL 9963 at Atlanta
Boston → Atlanta → Queretaro
Timetable, Atlanta time
16:00F9 3511 from Boston at the gate
09:30DL 9963 to Queretaro leaves the gate
17 h 30 apart on the timetable, overnight
DL 9963 leaves 17 h 30 after F9 3511 arrives on the timetable: more than half a day, so not a connection we count.