1. Home
2. Postage Help Center
3. USPS Overnight Shipping

USPS Overnight Shipping

Priority Mail Express delivers overnight to most major U.S. metro areas

Online buyers are more likely than ever to expect their e‑commerce purchases delivered fast and for a low cost. And with Amazon.com making one or two day delivery for online purchases as the new normal, e‑commerce sellers are often forced to use overnight shipping. In a recent study by UPS, 64% of online consumers said they expect next-day shipping for orders. Sometimes, overnight shipping is your only option to keep customers happy and buying.

Priority Mail Express is the U.S. Postal Service’s fastest shipping service, providing overnight delivery to most large metro areas. Unlike First Class Package Service and Priority Mail, Priority Mail Express is the only USPS shipping service that includes a guaranteed delivery time, with most packages delivered next day by 12 pm or 3 pm (local time). If the USPS fails to meet that guarantee, customers are eligible for a refund of all shipping charges.

USPS Overnight Shipping Rates

Priority Mail Express pricing is based on weight up to 70 lbs and distance using 9 total shipping zones. The service provides a Flat Rate Envelope option which is great for documents needing overnight delivery. Priority Mail Express also offers Sunday and Holiday delivery 365 days of the year along with priority delivery before 10:30 am next day for an additional cost. Dimensional Weight pricing is applied for packages over one cubic foot.

Priority Mail Express Service Features

USPS Priority Mail Express has unique advantages and options for online retailers.

• Each package includes $100 of insurance for no additional cost
• Free package pickup
• Proof of delivery signature record
• USPS is also the only way to ship overnight to a P.O. Box address
• Morning delivery (by 10:30 am) is available for an additional fee
• Option for deliveries on Sundays and holidays, at an additional fee
• For packages under 1 cubic foot, USPS does not use Dimensional (DIM) weight

How the USPS Overnight Shipping Guarantee Works

Priority Mail Express Rate Discounts

Stamps.com customer can enjoy discounted rates on Priority Mail Express that are not available at the Post Office. As a Stamps.com customer, you’ll get up to 12% off retail Post Office rates for Priority Mail Express shipping.

Easy Zone‑Based Pricing

With the USPS utilizing zone‑based pricing for Priority Mail Express, determining what zone your delivery location is located in and what shipping price to pay can be complex. The Stamps.com software automatically determines the correct zone‑based pricing for your package by instantly accessing the USPS database, preventing you from ever overpaying or underpaying the shipping fee.

Easily Print Shipping Labels

Stamps.com customers can easily print Priority Mail Express shipping labels to get their overnight delivery. Once the destination address is entered, the Stamps.com software automatically determines the correct zone‑based pricing for your package by instantly accessing the USPS database, preventing you from ever overpaying or underpaying the shipping fee.