How much does it cost to send a next day letter within the contigious US?

The cost to send a next-day letter within the contiguous United States typically varies based on the carrier and specific service options. For example, as of 2023, USPS Priority Mail Express starts around $26.35, while UPS and FedEx offer similar next-day services that can range from $30 to $60 or more, depending on weight and destination. It's advisable to check the respective carrier's website for the most accurate and up-to-date pricing.