UA 3236 then DL 1832 at Houston
Mc Allen → Houston → Minneapolis
Timetable, Houston time
20:10UA 3236 from Mc Allen at the gate
14:21DL 1832 to Minneapolis leaves the gate
18 h 11 apart on the timetable, overnight
DL 1832 leaves 18 h 11 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.