AA 4912 then CA 1018 at O'Hare
Grand Rapids → Chicago → Shanghai
Timetable, Chicago time
16:22AA 4912 from Grand Rapids at the gate
03:10CA 1018 to Shanghai leaves the gate
10 h 48 apart on the timetable, overnight
The last days
AA 4912 and CA 1018 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.