UA 1940 then DL 3876 at Denver
Omaha → Denver → Austin
Timetable, Denver time
10:31UA 1940 from Omaha at the gate
09:42DL 3876 to Austin leaves the gate
23 h 11 apart on the timetable, overnight
DL 3876 leaves 23 h 11 after UA 1940 arrives on the timetable: more than half a day, so not a connection we count.