UA 3758 then UA 4071 at Houston
Fort Worth → Houston → Greenville-Spartanburg
Timetable, Houston time
18:41UA 3758 from Fort Worth at the gate
18:40UA 4071 to Greenville-Spartanburg leaves the gate
23 h 59 apart on the timetable, overnight
UA 4071 leaves 23 h 59 after UA 3758 arrives on the timetable: more than half a day, so not a connection we count.