A study done by Shippo found that 97% of customers seek out merchants that offer free shipping. However, shipping is never free for the merchant. An order from a local customer may cost very little to deliver, while the shipping cost for a customer thousands of miles away may negate much of the profit margin on the order.
Offer free shipping storewide, but increase product prices by 7% for shoppers located 750+ miles from your warehouse. Increase prices by 12% for shoppers located in Alaska or Hawaii.