AA 6468 then UA 1883 at O'Hare
St Louis → Chicago → Richmond
Timetable, Chicago time
15:03AA 6468 from St Louis at the gate
18:23UA 1883 to Richmond leaves the gate
3 h 20 apart on the timetable
The last days
AA 6468 and UA 1883 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.