K4 579 then UA 2050 at O'Hare
Fairbanks → Chicago → Denver
Timetable, Chicago time
16:23K4 579 from Fairbanks at the gate
13:00UA 2050 to Denver leaves the gate
20 h 37 apart on the timetable, overnight
UA 2050 leaves 20 h 37 after K4 579 arrives on the timetable: more than half a day, so not a connection we count.