AA 947 then CI 5235 at O'Hare
Boston → Chicago → Seattle (SEA)
Timetable, Chicago time
09:30AA 947 from Boston at the gate
00:55CI 5235 to Seattle (SEA) leaves the gate
15 h 25 apart on the timetable, overnight
CI 5235 leaves 15 h 25 after AA 947 arrives on the timetable: more than half a day, so not a connection we count.