CK 225 then CV 251 at O'Hare
Seattle (SEA) → Chicago → Dallas-Fort Worth
Timetable, Chicago time
06:32CK 225 from Seattle (SEA) at the gate
22:10CV 251 to Dallas-Fort Worth leaves the gate
15 h 38 apart on the timetable
CV 251 leaves 15 h 38 after CK 225 arrives on the timetable: more than half a day, so not a connection we count.