UA 3900 then DL 2709 at Houston
Tulsa → Houston → Atlanta
Timetable, Houston time
11:45UA 3900 from Tulsa at the gate
08:05DL 2709 to Atlanta leaves the gate
20 h 20 apart on the timetable, overnight
DL 2709 leaves 20 h 20 after UA 3900 arrives on the timetable: more than half a day, so not a connection we count.