UA 4111 then UA 311 at Houston
Minot → Houston → Philadelphia
Timetable, Houston time
21:15UA 4111 from Minot at the gate
18:36UA 311 to Philadelphia leaves the gate
21 h 21 apart on the timetable, overnight
UA 311 leaves 21 h 21 after UA 4111 arrives on the timetable: more than half a day, so not a connection we count.