AA 9909 then UA 1525 at O'Hare
South Bend → Chicago → Las Vegas
Timetable, Chicago time
09:30AA 9909 from South Bend at the gate
15:00UA 1525 to Las Vegas leaves the gate
5 h 30 apart on the timetable
Today
From the airport’s board at 21:15 Chicago time
09:30AA 9909 is cancelled
15:00UA 1525 is cancelled
The last days
AA 9909 and UA 1525 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.