UA 428 then UA 6086 at Houston
Mexico City → Houston → Shreveport
Timetable, Houston time
10:09UA 428 from Mexico City at the gate
07:00UA 6086 to Shreveport leaves the gate
20 h 51 apart on the timetable, overnight
UA 6086 leaves 20 h 51 after UA 428 arrives on the timetable: more than half a day, so not a connection we count.