UA 4389 then AA 4480 at O'Hare
St Louis → Chicago → Louisville
Timetable, Chicago time
16:49UA 4389 from St Louis at the gate
19:00AA 4480 to Louisville leaves the gate
2 h 11 apart on the timetable
The last days
UA 4389 and AA 4480 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.