AA 391 then UA 1564 at DFW
Fort Myers → Dallas-Fort Worth → Chicago O'Hare
Timetable, Dallas-Fort Worth time
16:49AA 391 from Fort Myers at the gate
16:15UA 1564 to Chicago O'Hare leaves the gate
23 h 26 apart on the timetable, overnight
UA 1564 leaves 23 h 26 after AA 391 arrives on the timetable: more than half a day, so not a connection we count.