CK 227 then UA 4393 at O'Hare
Seattle (SEA) → Chicago → Tulsa
Timetable, Chicago time
12:56CK 227 from Seattle (SEA) at the gate
12:45UA 4393 to Tulsa leaves the gate
23 h 49 apart on the timetable, overnight
UA 4393 leaves 23 h 49 after CK 227 arrives on the timetable: more than half a day, so not a connection we count.