UA 2197 then AA 1869 at Houston
Pittsburgh → Houston → Miami
Timetable, Houston time
15:11UA 2197 from Pittsburgh at the gate
13:20AA 1869 to Miami leaves the gate
22 h 09 apart on the timetable, overnight
AA 1869 leaves 22 h 09 after UA 2197 arrives on the timetable: more than half a day, so not a connection we count.