AA 2389 then UA 1164 at O'Hare
Calgary → Chicago → Cedar Rapids
Timetable, Chicago time
18:44AA 2389 from Calgary at the gate
21:40UA 1164 to Cedar Rapids leaves the gate
2 h 56 apart on the timetable
The last days
AA 2389 and UA 1164 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.