UA 4111 then UA 2804 at Houston
Minot → Houston → St Louis
Timetable, Houston time
21:15UA 4111 from Minot at the gate
20:20UA 2804 to St Louis leaves the gate
23 h 05 apart on the timetable, overnight
UA 2804 leaves 23 h 05 after UA 4111 arrives on the timetable: more than half a day, so not a connection we count.