UA 3920 then AA 6309 at Houston
Orlando → Houston → Los Angeles
Timetable, Houston time
19:47UA 3920 from Orlando at the gate
15:19AA 6309 to Los Angeles leaves the gate
19 h 32 apart on the timetable, overnight
AA 6309 leaves 19 h 32 after UA 3920 arrives on the timetable: more than half a day, so not a connection we count.