least expensive way to ship to canada The least expensive way to ship to Canada depends on the size and weight of the package, as well as the shipping carrier. For smaller packages, USPS First-Class Mail International is often the most affordable option, while larger packages may benefit from UPS Ground or FedEx Ground services. Additionally, using flat-rate shipping options, such as USPS Priority Mail Flat Rate, can help save on costs. Comparing rates from different carriers and considering delivery times can help identify the most cost-effective shipping solution.