UA 4966 then DL 2709 at Houston
Springfield → Houston → Atlanta
Timetable, Houston time
11:09UA 4966 from Springfield at the gate
08:05DL 2709 to Atlanta leaves the gate
20 h 56 apart on the timetable, overnight
DL 2709 leaves 20 h 56 after UA 4966 arrives on the timetable: more than half a day, so not a connection we count.