BR 608 then AA 3620 at O'Hare
Anchorage → Chicago → St Louis
Timetable, Chicago time
20:03BR 608 from Anchorage at the gate
15:26AA 3620 to St Louis leaves the gate
19 h 23 apart on the timetable, overnight
AA 3620 leaves 19 h 23 after BR 608 arrives on the timetable: more than half a day, so not a connection we count.