CK 625 then UA 4772 at O'Hare
Seattle (SEA) → Chicago → Columbia Regional
Timetable, Chicago time
16:33CK 625 from Seattle (SEA) at the gate
12:45UA 4772 to Columbia Regional leaves the gate
20 h 12 apart on the timetable, overnight
UA 4772 leaves 20 h 12 after CK 625 arrives on the timetable: more than half a day, so not a connection we count.