UA 4111 then UA 880 at Houston
Minot → Houston → London
Timetable, Houston time
21:15UA 4111 from Minot at the gate
16:25UA 880 to London leaves the gate
19 h 10 apart on the timetable, overnight
UA 880 leaves 19 h 10 after UA 4111 arrives on the timetable: more than half a day, so not a connection we count.