With Priority Mail Express Flat Rate™, shipping with the Postal Service™ is even easier, as Flat Rate offers one rate to any state. Similar to our Priority Mail Express service, our Flat Rate is our fastest service, with limited exceptions, available 365 days a year with a money-back guarantee and provides overnight delivery1 to most U.S. addresses including PO Boxes™ and military addresses all for one low, Flat Rate. And you’ll save even more when you buy Priority Mail Express Flat Rate postage online.
Features• No weighing or calculating needed• Overnight delivery to most U.S. locations• Free Package Pickup• Money-back guarantee• Price includes proof of delivery signature record (if requested at time of purchase), and tracking information with USPS
• Tracking™ and up to $100 in insurance coverage• No surcharges for fuel or Saturday, residential, and rural delivery• Sunday and holiday delivery service available for a small fee