UA 396 then DL 3876 at Denver
Lexington → Denver → Austin
Timetable, Denver time
10:20UA 396 from Lexington at the gate
09:42DL 3876 to Austin leaves the gate
23 h 22 apart on the timetable, overnight
DL 3876 leaves 23 h 22 after UA 396 arrives on the timetable: more than half a day, so not a connection we count.