AA 377 then UA 3914 at O'Hare
Raleigh-Durham → Chicago → Houston
Timetable, Chicago time
07:37AA 377 from Raleigh-Durham at the gate
20:30UA 3914 to Houston leaves the gate
12 h 53 apart on the timetable
UA 3914 leaves 12 h 53 after AA 377 arrives on the timetable: more than half a day, so not a connection we count.