AA 294 then UA 3914 at O'Hare
Seattle (SEA) → Chicago → Houston
Timetable, Chicago time
05:35AA 294 from Seattle (SEA) at the gate
20:30UA 3914 to Houston leaves the gate
14 h 55 apart on the timetable
UA 3914 leaves 14 h 55 after AA 294 arrives on the timetable: more than half a day, so not a connection we count.