UA 908 then AA 3484 at O'Hare
Amsterdam → Chicago → St Louis
Timetable, Chicago time
14:05UA 908 from Amsterdam at the gate
09:30AA 3484 to St Louis leaves the gate
19 h 25 apart on the timetable, overnight
AA 3484 leaves 19 h 25 after UA 908 arrives on the timetable: more than half a day, so not a connection we count.