AA 462 then UA 3914 at O'Hare
New York LaGuardia → Chicago → Houston
Timetable, Chicago time
07:49AA 462 from New York LaGuardia at the gate
20:30UA 3914 to Houston leaves the gate
12 h 41 apart on the timetable
UA 3914 leaves 12 h 41 after AA 462 arrives on the timetable: more than half a day, so not a connection we count.