AA 2403 then AA 2512 at DFW
Atlanta → Dallas-Fort Worth → Ontario
Timetable, Dallas-Fort Worth time
21:44AA 2403 from Atlanta at the gate
21:41AA 2512 to Ontario leaves the gate
23 h 57 apart on the timetable, overnight
AA 2512 leaves 23 h 57 after AA 2403 arrives on the timetable: more than half a day, so not a connection we count.