DL 9941 then UA 214 at Atlanta
Queretaro → Atlanta → Houston
Timetable, Atlanta time
19:43DL 9941 from Queretaro at the gate
17:00UA 214 to Houston leaves the gate
21 h 17 apart on the timetable, overnight
UA 214 leaves 21 h 17 after DL 9941 arrives on the timetable: more than half a day, so not a connection we count.