The Complete USPS Guide for Puerto Rico: Why It's Always the Cheapest Option

If you ship anything to Puerto Rico, USPS should be your default carrier . Here's why — with real numbers. USPS Treats Puerto Rico as Fully Domestic Unlike UPS and FedEx (which add $4-12 in "Extended Area Surcharges"), USPS charges the exact same rates for Puerto Rico as any mainland address in the same zone. No surcharges. No "island fees." No surprises. The Price Difference Is Staggering For a 10 lb package from Miami to San Juan: Carrier Service Price Surcharges Total USPS Priority Mail $14.50 $0 $14.50 USPS Ground Advantage $9.20 $0 $9.20 UPS Ground $22.00 +$6.50 $28.50 FedEx Ground $24.00 +$7.80 $31.80 UPS 2nd Day Air $52.00 +$12.00 $64.00 USPS is 50-70% cheaper for the same route. The Flat Rate Hack USPS Flat Rate boxes are the ultimate PR shipping hack: Small Flat Rate Box : $10.40 (up to 70 lbs) Medium Flat Rate Box : $17.10 (up to 70 lbs) Large Flat Rate Box : $22.45 (up to 70 lbs) That Large Flat Rate Box? 70 pounds for $22.45. The same weight via UPS Ground would cost $80+.