AA 4919 then UA 3755 at O'Hare
Milwaukee → Chicago → Denver
Timetable, Chicago time
12:49AA 4919 from Milwaukee at the gate
18:37UA 3755 to Denver leaves the gate
5 h 48 apart on the timetable
Today
From the airport’s board at 18:43 Chicago time
12:49AA 4919 is cancelled
18:32UA 3755 left the gate5 min early
The last days
AA 4919 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.