K4 579 then UA 3556 at O'Hare
Fairbanks → Chicago → St Louis
Timetable, Chicago time
16:23K4 579 from Fairbanks at the gate
08:55UA 3556 to St Louis leaves the gate
16 h 32 apart on the timetable, overnight
UA 3556 leaves 16 h 32 after K4 579 arrives on the timetable: more than half a day, so not a connection we count.