DL 576 then WN 3553 at Atlanta
Mexico City → Atlanta → Pittsburgh
Timetable, Atlanta time
16:45DL 576 from Mexico City at the gate
16:30WN 3553 to Pittsburgh leaves the gate
23 h 45 apart on the timetable, overnight
WN 3553 leaves 23 h 45 after DL 576 arrives on the timetable: more than half a day, so not a connection we count.