CK 227 then AA 489 at O'Hare
Seattle (SEA) → Chicago → Washington National
Timetable, Chicago time
22:54CK 227 from Seattle (SEA) at the gate
17:49AA 489 to Washington National leaves the gate
18 h 55 apart on the timetable, overnight
AA 489 leaves 18 h 55 after CK 227 arrives on the timetable: more than half a day, so not a connection we count.