K4 537 then UA 2138 at O'Hare
Anchorage → Chicago → San Diego
Timetable, Chicago time
23:39K4 537 from Anchorage at the gate
16:00UA 2138 to San Diego leaves the gate
16 h 21 apart on the timetable, overnight
UA 2138 leaves 16 h 21 after K4 537 arrives on the timetable: more than half a day, so not a connection we count.