how much to mail letter overnight

how much to mail letter overnight through USPS depends on the size, weight, and destination of the letter. The USPS Priority Mail Express service provides overnight delivery for letters and packages. The cost for this service typically starts around $26.35 for a flat-rate envelope, with prices increasing based on the distance and weight of the item being shipped. This is one of the fastest and most reliable shipping options available through USPS for time-sensitive deliveries.