CZ 435 then AA 2504 at O'Hare
Anchorage → Chicago → Houston
Timetable, Chicago time
15:58CZ 435 from Anchorage at the gate
07:21AA 2504 to Houston leaves the gate
15 h 23 apart on the timetable, overnight
AA 2504 leaves 15 h 23 after CZ 435 arrives on the timetable: more than half a day, so not a connection we count.