UA 584 then UA 6086 at Houston
Philadelphia → Houston → Shreveport
Timetable, Houston time
10:48UA 584 from Philadelphia at the gate
07:00UA 6086 to Shreveport leaves the gate
20 h 12 apart on the timetable, overnight
UA 6086 leaves 20 h 12 after UA 584 arrives on the timetable: more than half a day, so not a connection we count.