K4 537 then UA 2106 at O'Hare
Anchorage → Chicago → San Francisco
Timetable, Chicago time
23:39K4 537 from Anchorage at the gate
21:57UA 2106 to San Francisco leaves the gate
22 h 18 apart on the timetable, overnight
UA 2106 leaves 22 h 18 after K4 537 arrives on the timetable: more than half a day, so not a connection we count.