UA 5210 then AA 6487 at O'Hare
Saginaw → Chicago → St Louis
Timetable, Chicago time
10:10UA 5210 from Saginaw at the gate
15:18AA 6487 to St Louis leaves the gate
5 h 08 apart on the timetable
Today
From the airport’s board at 10:55 Chicago time
10:10UA 5210 due at the gate, no estimate yet
15:18AA 6487 due to leave, no estimate yet
5 h 08 between the gates, on these times
The last days
UA 5210 and AA 6487 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.