what is the cheapest way to mail a package internationally What is the cheapest way to mail a package internationally typically involves using USPS First-Class Package International Service for parcels under 4 lbs. It’s the most economical option but offers limited tracking. Alternatives include third-party shipping platforms like Pirate Ship or Easyship that provide discounted international courier rates. For heavier items, consolidators or slower cargo options can help reduce costs. Comparing quotes from carriers like USPS, DHL, and UPS ensures the most cost-effective method.