DL 1007 then UA 214 at Atlanta
Washington National → Atlanta → Houston
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
17:00UA 214 to Houston leaves the gate
19 h 19 apart on the timetable, overnight
UA 214 leaves 19 h 19 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.