CZ 427 then AA 1632 at O'Hare
Anchorage → Chicago → Tucson
Timetable, Chicago time
05:24CZ 427 from Anchorage at the gate
20:56AA 1632 to Tucson leaves the gate
15 h 32 apart on the timetable
AA 1632 leaves 15 h 32 after CZ 427 arrives on the timetable: more than half a day, so not a connection we count.