K4 579 then UA 1996 at O'Hare
Fairbanks → Chicago → San Juan
Timetable, Chicago time
16:23K4 579 from Fairbanks at the gate
08:52UA 1996 to San Juan leaves the gate
16 h 29 apart on the timetable, overnight
UA 1996 leaves 16 h 29 after K4 579 arrives on the timetable: more than half a day, so not a connection we count.