K4 551 then UA 587 at O'Hare
Anchorage → Chicago → Washington
Timetable, Chicago time
16:28K4 551 from Anchorage at the gate
14:29UA 587 to Washington leaves the gate
22 h 01 apart on the timetable, overnight
UA 587 leaves 22 h 01 after K4 551 arrives on the timetable: more than half a day, so not a connection we count.