DL 2709 then UA 4004 at Houston
Atlanta → Houston → Greenville-Spartanburg
Timetable, Houston time
13:23DL 2709 from Atlanta at the gate
13:14UA 4004 to Greenville-Spartanburg leaves the gate
23 h 51 apart on the timetable, overnight
UA 4004 leaves 23 h 51 after DL 2709 arrives on the timetable: more than half a day, so not a connection we count.