us post express

us post express USPS Express Mail, now known as Priority Mail Express, is the fastest domestic service offered by the United States Postal Service. This service guarantees overnight delivery to most U.S. locations, including weekends and holidays, with tracking and insurance coverage for up to $100. Priority Mail Express offers flat-rate pricing, making it an ideal option for urgent shipments. For international shipments, the USPS also provides an Express International service with similar fast delivery timelines.