AA 349 then F9 3990 at DFW
Key West → Dallas-Fort Worth → Detroit
Timetable, Dallas-Fort Worth time
16:42AA 349 from Key West at the gate
14:55F9 3990 to Detroit leaves the gate
22 h 13 apart on the timetable, overnight
F9 3990 leaves 22 h 13 after AA 349 arrives on the timetable: more than half a day, so not a connection we count.