AA 2357 then DL 3876 at Denver
Dallas-Fort Worth → Denver → Austin
Timetable, Denver time
09:47AA 2357 from Dallas-Fort Worth at the gate
09:42DL 3876 to Austin leaves the gate
23 h 55 apart on the timetable, overnight
DL 3876 leaves 23 h 55 after AA 2357 arrives on the timetable: more than half a day, so not a connection we count.