K4 579 then UA 1606 at O'Hare
Fairbanks → Chicago → Boston
Timetable, Chicago time
16:23K4 579 from Fairbanks at the gate
10:42UA 1606 to Boston leaves the gate
18 h 19 apart on the timetable, overnight
UA 1606 leaves 18 h 19 after K4 579 arrives on the timetable: more than half a day, so not a connection we count.