what’s the difference between priority and first class mail is a common question asked by those comparing postal services, particularly with USPS. Priority Mail is a faster shipping option that delivers within 1-3 business days, whereas First-Class Mail is a more affordable option, generally used for smaller and lighter packages, and delivers within 2-5 business days. Priority Mail includes benefits like insurance for packages up to $50 and a tracking number, while First-Class Mail is typically used for letters and smaller parcels, with limited tracking and no built-in insurance. Customers should choose the shipping option based on their needs for speed, cost, and package size.