K4 537 then 5X 609 at O'Hare
Anchorage → Chicago → Philadelphia
Timetable, Chicago time
23:39K4 537 from Anchorage at the gate
22:005X 609 to Philadelphia leaves the gate
22 h 21 apart on the timetable, overnight
5X 609 leaves 22 h 21 after K4 537 arrives on the timetable: more than half a day, so not a connection we count.