UA 441 then AA 3740 at DFW
Chicago O'Hare → Dallas-Fort Worth → Acapulco
Timetable, Dallas-Fort Worth time
14:38UA 441 from Chicago O'Hare at the gate
09:45AA 3740 to Acapulco leaves the gate
19 h 07 apart on the timetable, overnight
AA 3740 leaves 19 h 07 after UA 441 arrives on the timetable: more than half a day, so not a connection we count.