How much does it cost to mail a letter Puerto Rico from the US?

Regular Letter: (1oz) from the US to Puerto Rico: $1.50

Package (up to 13oz) from the US to Puerto Rico: Start at $9.45

Priority Mail Flat-Rate Envelope: $8.95

Prices may vary depending on weight, size, and mailing service selected. You can use the USPS Postage Calculator to get a precise postage rate.