Chick-fil-A

Chick-fil-A's pressure-cooked chicken sandwich is the industry's profit king: each of its over 3,000 locations earns more than $5 million annually, outperforming In-N-Out's average of $2.8 million per unit. The chain achieves this despite closing all locations on Sundays, a policy that reduces operating days by 14% yet strengthens brand loyalty. Its signature sandwich delivers 440 calories for $5.49, making it cheaper than the average premium chicken sandwich from major rivals.