DL 1007 then UA 2376 at Atlanta
Washington National → Atlanta → Houston
Timetable, Atlanta time
21:41DL 1007 from Washington National at the gate
18:20UA 2376 to Houston leaves the gate
20 h 39 apart on the timetable, overnight
UA 2376 leaves 20 h 39 after DL 1007 arrives on the timetable: more than half a day, so not a connection we count.