BR 608 then UA 587 at O'Hare
Anchorage → Chicago → Washington
Timetable, Chicago time
20:03BR 608 from Anchorage at the gate
14:21UA 587 to Washington leaves the gate
18 h 18 apart on the timetable, overnight
UA 587 leaves 18 h 18 after BR 608 arrives on the timetable: more than half a day, so not a connection we count.