us postal service time estimate

us postal service time estimate varies based on the shipping service selected. USPS First-Class Mail typically takes 2–5 business days, while Priority Mail offers 1–3 day delivery and Priority Mail Express guarantees overnight to two-day service. Ground Advantage may take 2–5 days depending on distance. Customers can use the USPS tracking tool or the shipping calculator to get more accurate delivery windows based on ZIP codes. External factors like holidays, weather, and operational delays can also impact actual delivery timeframes.