UA 1891 then DL 3876 at Denver
Minneapolis → Denver → Austin
Timetable, Denver time
10:13UA 1891 from Minneapolis at the gate
09:42DL 3876 to Austin leaves the gate
23 h 29 apart on the timetable, overnight
DL 3876 leaves 23 h 29 after UA 1891 arrives on the timetable: more than half a day, so not a connection we count.