UA 4111 then BA 9603 at Houston
Minot → Houston → London
Timetable, Houston time
21:15UA 4111 from Minot at the gate
17:10BA 9603 to London leaves the gate
19 h 55 apart on the timetable, overnight
BA 9603 leaves 19 h 55 after UA 4111 arrives on the timetable: more than half a day, so not a connection we count.