U.S. Postal Service
- Priority Mail Flat Rate boxes are great for clothes, books and kitchen gear: one price, whatever the weight, as long as it fits. Make sure the box says “Flat Rate.” Regular Priority boxes look similar but are priced by weight.
- Priority Mail travels by air. USPS now estimates 2–6 days to the CNMI, but plan on a week or two.
- Ground Advantage is cheaper. As of October 2026 it travels mostly by ship, and USPS says to expect 10 days or more, sometimes much longer.
- Media Mail is the cheapest way to send books, but it's slow.
Customs forms: any package going to Saipan that contains goods, or weighs 16 oz or more, needs a customs form. Fill it out online or pick up a stack at the Post Office and fill them in at home before you go. USPS customs forms