UA 3874 then AA 4541 at O'Hare
Melbourne (Florida) → Chicago → Indianapolis
Timetable, Chicago time
12:03UA 3874 from Melbourne (Florida) at the gate
12:38AA 4541 to Indianapolis leaves the gate
35 min apart on the timetable
The last days
UA 3874 and AA 4541 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.