AA 1840 then F9 3227 at Houston
Charlotte → Houston → Denver
Timetable, Houston time
22:44AA 1840 from Charlotte at the gate
10:47F9 3227 to Denver leaves the gate
12 h 03 apart on the timetable, overnight
F9 3227 leaves 12 h 03 after AA 1840 arrives on the timetable: more than half a day, so not a connection we count.