If you're using USPS Priority or First Class Mail - shipping to HI and AK is totally fine. ... There is no reason to limit shipping to the 48 contiguous states. It costs no more to ship to Hawaii, or Alaska, APO/FPO, or US territories and protectorates. In fact, if your item fits into one of the USPS Flat Rate Priority Mail Boxes, you can send anything that fits into it for $13.65 which gets all the way to a mailbox in Hawaii within 3-4 days.. Put CONUS Only on your ad and you lose over 2 million customers just in Hawaii and Alaska for nothing.