The single most useful fact about shipping to Puerto Rico: USPS treats it as domestic. Domestic postage rates, domestic tracking, and for ordinary merchandise no customs declaration — a point that surprises sellers who assumed an international process. The live prices below are what a real box cost to San Juan on our runs.
Quoted 2026-07-27, one real box to the island, and the carriers' own numbers kept intact in the tables below.
San Juan gets quoted here exactly like a mainland city: we sent a 12 × 10 × 6 in box at 5 lb of household goods through the SMKlog calculator from both coasts and printed the responses untouched. Each figure is the final checkout amount, postage plus SMKlog's charge, nothing appended afterward.
| Carrier | Service | Price | Quoted transit |
|---|---|---|---|
| USPS | Ground Advantage | $19.60 | 8-9 business days |
| USPS | Priority Mail | $31.24 | 6-7 business days |
| FedEx | Ground Economy | $51.29 | 13-14 business days |
| USPS | Priority Mail Express | $103.46 | 4-5 business days |
| Carrier | Service | Price | Quoted transit |
|---|---|---|---|
| USPS | Ground Advantage | $21.28 | 13-14 business days |
| USPS | Priority Mail | $31.29 | 6-7 business days |
| FedEx | Ground Economy | $51.29 | 14-15 business days |
| USPS | Priority Mail Express | $107.72 | 6-7 business days |
USPS owned the low end to San Juan on both runs, with Ground Advantage at $19.60 from Newark and $21.28 from Los Angeles. Watch the windows, though. Ocean and air legs make ground service to the island far slower than mainland ground, so Priority Mail at $31.24 closes much of the value gap. Every Puerto Rico ZIP begins with 006 through 009; a checkout that rejects one is treating the territory as foreign, which ours does not. As always, these rows are dated, and your own quote is one form away.
Every ZIP on the island starts with 006, 007, 008 or 009, and USPS handles them as fully domestic destinations. If some other tool refuses a valid San Juan ZIP, it has misfiled the territory as international. Enter the ZIP here and it quotes like Ohio.
No scale on hand is fine. Describe the item in ordinary words and SMKlog estimates the packed box, or supply exact dimensions if you know them. The carriers then return live island rates for that specific parcel rather than a generic chart price.
A parcel crossing water passes through more hands and more days than a mainland one. For anything valuable, shipping protection is cheap peace of mind, and photographing the packed contents before sealing makes any future claim simpler.
Our dated run, 2026-07-27, priced a 12 × 10 × 6 in, 5 lb box at $19.60 from Newark, NJ and $21.28 from Los Angeles, CA, both via USPS Ground Advantage. Totals include SMKlog's charge and match checkout exactly. Island rates shift like any others, so quote fresh before you buy.
Longer than the mainland at the ground tier: 8-9 business days from Newark and 13-14 from Los Angeles on our run. USPS Priority Mail quoted 6-7 days from either coast, and Priority Mail Express got there in a quoted 4-5 from the East at $103.46. The tables carry each service's own window.
Not for ordinary merchandise through USPS. The island is inside the domestic mail system, so you buy domestic postage and get standard domestic tracking. A few carrier products treat territories under separate rules, one more reason to compare live for the exact route.
You don't. Describe the shipment, enter the two ZIPs, choose from the live carrier list, pay, and print. Tracking is part of every label.