AA 4464 then UA 8139 at O'Hare
New Orleans → Chicago → Nashville
Timetable, Chicago time
13:57AA 4464 from New Orleans at the gate
18:20UA 8139 to Nashville leaves the gate
4 h 23 apart on the timetable
The last days
AA 4464 and UA 8139 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.