us postal service overnight letter rates

us postal service overnight letter rates are the charges applied to send a letter via USPS’s fastest service, which is typically Priority Mail Express. This service guarantees overnight delivery to most locations within the U.S., and rates vary based on the weight of the letter and its destination. USPS Priority Mail Express is often used for time-sensitive documents, including legal papers, contracts, and important business correspondence, ensuring that they arrive by the next day.