AM 686 then UA 3916 at O'Hare
Mexico City → Chicago → New Orleans
Timetable, Chicago time
13:12AM 686 from Mexico City at the gate
07:00UA 3916 to New Orleans leaves the gate
17 h 48 apart on the timetable, overnight
UA 3916 leaves 17 h 48 after AM 686 arrives on the timetable: more than half a day, so not a connection we count.