AA 985 then UA 3755 at O'Hare
Phoenix → Chicago → Louisville
Timetable, Chicago time
13:40AA 985 from Phoenix at the gate
16:20UA 3755 to Louisville leaves the gate
2 h 40 apart on the timetable
The last days
AA 985 and UA 3755 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.