ET 3608 then AA 4548 at O'Hare
Anchorage → Chicago → Des Moines
Timetable, Chicago time
07:16ET 3608 from Anchorage at the gate
22:45AA 4548 to Des Moines leaves the gate
15 h 29 apart on the timetable
AA 4548 leaves 15 h 29 after ET 3608 arrives on the timetable: more than half a day, so not a connection we count.