Money Chick-fil-A is missing out on more than $1B in sales by closing on Sundays July 14, 2019July 21, 2019 Douglas A. McIntyre, 24/7 Wall Street Comments Off on Chick-fil-A is missing out on more than $1B in sales by closing on Sundays Chick-fil-A made the decision in 1946 that it would not be open on Sundays. That decision could be costing it billions.