USPS Flat Rate International Shipping Cost

Last Updated:
February 20, 2026
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USPS Flat Rate International Shipping Cost
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USPS Flat Rate International Shipping Cost

Curious to know how much USPS flat-rate international shipping costs and which USPS flat-rate international option is the cheapest or the fastest? USPS provides international flat-rate delivery, where you can ship using fixed-priced envelopes and boxes. 

The price is determined by the type of packaging and level of service, not by distance, as long as your product meets the size specifications and weight limit. Here you can get the current retail starting prices of envelopes and boxes, as well as what factors affect the ultimate rate. So that you can select the appropriate service depending on your budget and need.

What is USPS Flat Rate International Shipping?

USPS Flat Rate International shipping allows you to send packages abroad with already prepared USPS envelopes or boxes at a specific rate. The rate depends on the type of package that you choose and not the distance covered during shipment. 

As long as your product fits in the official USPS flat rate package and is not over the weight limit, you charge the same price to any eligible destination. USPS International shipping offers Priority Mail International and Priority Mail Express International services.

How Much Does Flat Rate International Shipping Cost?

The cost of flat rate international shipping begins at approximately $32.65 for a Priority Mail International Flat Rate Envelope and may exceed up to $113 for larger Express Flat Rate Boxes. The overall cost varies according to the speed of service and box size.

Factors That Affect the Overall International Prices 

When it comes to defining the shipping cost of this service, there are a number of factors that should be considered. All of them are important factors that need to be considered in determining the overall price.

  1. Type of Service (Priority Mail International or Express)
  2. Packaging size (Envelope, Small, Medium, Large Box)
  3. Retail and Commercial pricing.
  4. Price group of the destination country
  5. Additional services (additional insurance, signature confirmation)

Priority Mail International Flat Rate Prices 

Priority Mail International is the cheaper flat-rate international shipping. It takes 6 to 10 business days to deliver to more than 180 countries. Most destinations have tracking, and documents and merchandise are insured. It is most suitable for non-urgent shipments when it is more about cost-saving rather than speed.

Flat Rate Packaging Retail Price Starts From Weight Limit
Flat Rate Envelope $32.65 Up to 4 lbs
Small Flat Rate Box $33.75 Up to 4 lbs
Medium Flat Rate Box $61.80 Up to 20 lbs
Large Flat Rate Box $75.15 Up to 20 lbs

Priority Mail Express International Flat Rate Prices 

Priority Mail Express International is the faster option. It takes 3 to 5 business days to deliver and has tracking and insurance. There are destinations where a money-back guarantee applies. It is a more expensive service, which is applicable to urgent international delivery.

Flat Rate Packaging Retail Price Starts From Weight Limit
Flat Rate Envelope $62.70+ Up to 4 lbs
Medium Flat Rate Box $91.50+ Country-based
Large Flat Rate Box $113.25+ Country-based

Which Flat Rate International Service Should You Choose? 

To have the lowest flat rate international price, select a Priority Mail International Flat Rate Envelope with a starting price of approximately $32.65. In case your shipment is urgent, you can use Priority Mail Express International to deliver it in 3-5 days at a higher rate. Choose according to your budget, the weight of the package, and the fast delivery requirements. 

Note: USPS Flat Rate International delivery allows you to ship packages to more than 180 countries. You can check the USPS Index of Countries and Localities to get even more information about it and restrictions that may arise in the destination country.

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Eric Yin

Eric Yin is a seasoned supply chain strategist and author, renowned for his expertise in procurement and supplier management. With a career spanning various industries, Eric has developed a deep understanding of the intricacies of supply chain dynamics. Eric is an editor for Shipixy Blog where he also shares his insights on strategic sourcing, supplier relationship management, risk mitigation, and sustainable procurement practices. Eric's practical guidance equips professionals in the logistics industry with the tools needed to drive value and innovation throughout the supply chain.

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