priority mail how many days is an essential question for customers using USPS for shipping. USPS Priority Mail typically delivers within 1–3 business days depending on the origin and destination. It includes tracking, $100 insurance, and offers flat-rate shipping options for various package sizes. While not as fast as Priority Mail Express, it balances affordability with speed, making it a preferred option for both personal and small business shipping. Delivery timelines are not guaranteed but are generally reliable for domestic parcels. Knowing how long Priority Mail takes helps manage customer expectations and plan ahead for important shipments.