AA 1191 then DL 1709 at DFW
Los Angeles → Dallas-Fort Worth → Boston
Timetable, Dallas-Fort Worth time
13:45AA 1191 from Los Angeles at the gate
13:10DL 1709 to Boston leaves the gate
23 h 25 apart on the timetable, overnight
DL 1709 leaves 23 h 25 after AA 1191 arrives on the timetable: more than half a day, so not a connection we count.