AA 4557 then UA 8157 at O'Hare
Indianapolis → Chicago → Tampa
Timetable, Chicago time
07:11AA 4557 from Indianapolis at the gate
13:55UA 8157 to Tampa leaves the gate
6 h 44 apart on the timetable
The last days
AA 4557 and UA 8157 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.