AA 1811 then DL 873 at DFW
Boston → Dallas-Fort Worth → New York LaGuardia
Timetable, Dallas-Fort Worth time
11:40AA 1811 from Boston at the gate
10:59DL 873 to New York LaGuardia leaves the gate
23 h 19 apart on the timetable, overnight
DL 873 leaves 23 h 19 after AA 1811 arrives on the timetable: more than half a day, so not a connection we count.