CK 225 then DL 2231 at O'Hare
Seattle (SEA) → Chicago → Salt Lake City
Timetable, Chicago time
06:42CK 225 from Seattle (SEA) at the gate
06:30DL 2231 to Salt Lake City leaves the gate
23 h 48 apart on the timetable, overnight
DL 2231 leaves 23 h 48 after CK 225 arrives on the timetable: more than half a day, so not a connection we count.