CV 12 then UA 638 at O'Hare
Anchorage → Chicago → San Francisco
Timetable, Chicago time
19:11CV 12 from Anchorage at the gate
12:42UA 638 to San Francisco leaves the gate
17 h 31 apart on the timetable, overnight
UA 638 leaves 17 h 31 after CV 12 arrives on the timetable: more than half a day, so not a connection we count.