Chick-fil-A stops serving breakfast at 10:30 AM from Monday through Saturday. Breakfast service typically starts at 6:30 AM and ends sharply at 10:30 AM. Chick-fil-A does not serve breakfast on Sundays, as most locations are closed that day. Some locations may have slight variations in timing, but the general rule is that breakfast ends at 10:30 AM daily except Sunday when the restaurant is closed. This cutoff time is fixed to help transition kitchen operations to lunch service efficiently.