AA 3131 then UA 1504 at O'Hare
Minneapolis → Chicago → Kansas City
Timetable, Chicago time
15:55AA 3131 from Minneapolis at the gate
19:59UA 1504 to Kansas City leaves the gate
4 h 04 apart on the timetable
The last days
AA 3131 and UA 1504 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.