AA 1866 then WN 3374 at Philadelphia
Denver → Philadelphia → Chicago Midway
Timetable, Philadelphia time
05:35AA 1866 from Denver at the gate
11:40WN 3374 to Chicago Midway leaves the gate
6 h 05 apart on the timetable
The last days
AA 1866 and WN 3374 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.