DL 1585 then DL 1507 at Atlanta
Houston → Atlanta → Tri-Cities
Timetable, Atlanta time
13:34DL 1585 from Houston at the gate
11:59DL 1507 to Tri-Cities leaves the gate
22 h 25 apart on the timetable, overnight
DL 1507 leaves 22 h 25 after DL 1585 arrives on the timetable: more than half a day, so not a connection we count.