K4 537 then UA 5380 at O'Hare
Anchorage → Chicago → Flint
Timetable, Chicago time
23:39K4 537 from Anchorage at the gate
21:20UA 5380 to Flint leaves the gate
21 h 41 apart on the timetable, overnight
UA 5380 leaves 21 h 41 after K4 537 arrives on the timetable: more than half a day, so not a connection we count.