AA 894 then UA 2324 at O'Hare
Boston → Chicago → Kansas City
Timetable, Chicago time
14:18AA 894 from Boston at the gate
19:59UA 2324 to Kansas City leaves the gate
5 h 41 apart on the timetable
The last days
AA 894 and UA 2324 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.