DL 9941 then UA 745 at Atlanta
Queretaro → Atlanta → Chicago O'Hare
Timetable, Atlanta time
19:43DL 9941 from Queretaro at the gate
13:10UA 745 to Chicago O'Hare leaves the gate
17 h 27 apart on the timetable, overnight
UA 745 leaves 17 h 27 after DL 9941 arrives on the timetable: more than half a day, so not a connection we count.