UA 3913 then DL 2656 at Houston
Denver → Houston → Minneapolis
Timetable, Houston time
21:22UA 3913 from Denver at the gate
11:05DL 2656 to Minneapolis leaves the gate
13 h 43 apart on the timetable, overnight
DL 2656 leaves 13 h 43 after UA 3913 arrives on the timetable: more than half a day, so not a connection we count.