Priority Mail Express

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Priority Mail Express boxes

Priority Mail Express is our fastest domestic service, with limited exceptions, available 365 days a year, with a money-back guarantee and overnight scheduled delivery to most U.S. addresses, including PO Boxes.


  • Overnight scheduled delivery to most U.S. destinations with a money-back guarantee
  • Price includes proof of delivery signature record (if requested at time of purchase), and tracking information with USPS Tracking
  • Includes up to $100 of insurance with most shipments

Flat Rate Options:

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 domestic service.

  • Flat-Rate Envelope Postage: $19.99
    Dimensions: 12-1/2" x 9-1/2"
  • Flat-Rate Padded Envelope Postage: $19.99
    Dimensions: 12 1/2" x 9 1/2"
  • Medium Flat-Rate Box Postage: $44.95
    Dimensions: 11" x 8-1/2" x 5-1/2" or 13-5/8" x 11-7/8" x 3-3/8