AA 519 then UA 9908 at O'Hare
Portland (Oregon) → Chicago → Milwaukee
Timetable, Chicago time
05:07AA 519 from Portland (Oregon) at the gate
12:00UA 9908 to Milwaukee leaves the gate
6 h 53 apart on the timetable
The last days
AA 519 and UA 9908 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.