Same-day delivery is free for orders worth more than $25 for Prime members. If an order doesn't meet the minimum amount, subscribers can still choose same-day delivery for a$2.99 fee. For customers without a Prime membership, the service is available with a $12.99 fee, regardless of the order size. Amazon is now letting shoppers in 1,000 cities across the U.S. order perishable food items through its Same- Day Delivery service, as the e-commerce giant seeks to compete more directly with Instacart and Walmar ...