DL 9951 then DL 360 at Atlanta
Queretaro → Atlanta → Washington National
Timetable, Atlanta time
20:38DL 9951 from Queretaro at the gate
13:15DL 360 to Washington National leaves the gate
16 h 37 apart on the timetable, overnight
DL 360 leaves 16 h 37 after DL 9951 arrives on the timetable: more than half a day, so not a connection we count.