UA 4299 then DL 2709 at Houston
Mc Allen → Houston → Atlanta
Timetable, Houston time
10:56UA 4299 from Mc Allen at the gate
08:05DL 2709 to Atlanta leaves the gate
21 h 09 apart on the timetable, overnight
DL 2709 leaves 21 h 09 after UA 4299 arrives on the timetable: more than half a day, so not a connection we count.