AA 2146 then CI 5235 at O'Hare
Boston → Chicago → Seattle (SEA)
Timetable, Chicago time
08:00AA 2146 from Boston at the gate
00:55CI 5235 to Seattle (SEA) leaves the gate
16 h 55 apart on the timetable, overnight
CI 5235 leaves 16 h 55 after AA 2146 arrives on the timetable: more than half a day, so not a connection we count.