AA 873 then CI 5235 at O'Hare
Atlanta → Chicago → Seattle (SEA)
Timetable, Chicago time
12:29AA 873 from Atlanta at the gate
00:55CI 5235 to Seattle (SEA) leaves the gate
12 h 26 apart on the timetable, overnight
CI 5235 leaves 12 h 26 after AA 873 arrives on the timetable: more than half a day, so not a connection we count.