UA 347 then DL 3876 at Denver
Reno → Denver → Austin
Timetable, Denver time
12:20UA 347 from Reno at the gate
09:42DL 3876 to Austin leaves the gate
21 h 22 apart on the timetable, overnight
DL 3876 leaves 21 h 22 after UA 347 arrives on the timetable: more than half a day, so not a connection we count.