us postal overnight rates

us postal overnight rates depend on the weight, size, and destination of the parcel being shipped via USPS Priority Mail Express. This service guarantees next-day or 2-day delivery to most U.S. addresses, including weekends and holidays for an additional fee. Rates start around $28 for flat rate envelopes but can exceed $100 for large or heavy boxes. Commercial rates offer discounts for businesses and high-volume users. USPS provides tracking and up to $100 insurance with this service. Comparing Express with UPS and FedEx helps determine the best option for time-sensitive shipments within the United States.