DL 1007 then UA 4053 at Atlanta
Washington National → Atlanta → Houston
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
11:31UA 4053 to Houston leaves the gate
13 h 50 apart on the timetable, overnight
UA 4053 leaves 13 h 50 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.