Priority Mail Express® service provides 1–3 day delivery service by 6 PM with a money–back guarantee. You get competitive prices and fast delivery every day, all year, with limited exceptions, to most U.S. addresses and PO Boxes. Priority Mail Express Flat Rate lets you ship packages up to 70 lbs to any state at the same price. Mail from Post Office locations or online from your home or business. Prices start at $35.65 at a Post Office. (Ship online with Click-N-Ship and get lower Commercial Rates.)

Priority Mail Express® service provides 1–3 day delivery service by 6 PM with a money–back guarantee. You get competitive prices and fast delivery every day, all year, with limited exceptions, to most U.S. addresses and PO Boxes. Priority Mail Express Flat Rate lets you ship packages up to 70 lbs to any state at the same price. Mail from Post Office locations or online from your home or business. Prices start at $35.65 at a Post Office. (Ship online with Click-N-Ship and get lower Commercial Rates.) Features & Pricing: - Fastest delivery times: 1–3 days with a money-back guarantee - Sunday and holiday delivery available in many major markets for an additional fee - Free Package Pickup service at your home or office - Includes USPS Tracking and up to $100 of insurance with most shipments - Price includes proof of delivery signature record (if requested at time of purchase) - USPS Label Delivery service: For an extra $1.65 per label, we'll print an outbound label and deliver it to you Weight, Size, & Shape Requirements: - Flat Rate Envelopes: Pay one price for mailpieces weighing up to 70 lbs going anywhere in the U.S. - Priority Mail Express Shipping Boxes: Pay by weight and zone (distance). Maximum weight is 70 lbs. - Customer's own box: Pay by weight and zone. Maximum weight is 70 lbs. Maximum combined length and girth is 108 inches. Additional Fees: - Dimensional (DIM) weight rates apply to large, lightweight packages over 1 cubic foot (1,728 cubic inches) - Nonstandard Fee for packages between 22-30 inches long: $4.50; more than 30 inches: $21.00; more than 2 cubic feet: $35.00; nonstandard shape or material: $4.50 - Live Animal and Perishable Handling Fee: $7.50 For Businesses: - Priority Mail Express 1 day delivery available - Commercial Rates available through Click-N-Ship - Negotiated Service Agreement (NSA) available for larger volume shippers - Priority Mail Express Open & Distribute services available - USPS Label Delivery with $1.65 per label fee Flat Rate Products: - Flat Rate Envelope: $31.11 Commercial Pricing, $35.90 at Post Office, 12.5" x 9.5" - Legal Flat Rate Envelope: $31.43 Commercial Pricing, $36.20 at Post Office, 15" x 9.5" - Padded Flat Rate Envelope: $31.70 Commercial Pricing, $36.90 at Post Office, 12.5" x 9.5" Refund Policy: If your shipment didn't arrive on the guaranteed delivery date or time found on your receipt, submit a refund request for failure of service within 30 days of the mailing date.