AA 3409 then K4 810 at O'Hare
St Louis → Chicago → Anchorage
Timetable, Chicago time
07:34AA 3409 from St Louis at the gate
04:00K4 810 to Anchorage leaves the gate
20 h 26 apart on the timetable, overnight
K4 810 leaves 20 h 26 after AA 3409 arrives on the timetable: more than half a day, so not a connection we count.