UA 6125 then M6 5771 at Houston
Midland → Houston → Louisville
Timetable, Houston time
06:35UA 6125 from Midland at the gate
06:30M6 5771 to Louisville leaves the gate
23 h 55 apart on the timetable, overnight
M6 5771 leaves 23 h 55 after UA 6125 arrives on the timetable: more than half a day, so not a connection we count.