According to U.S. law, you can set sail and then disembark at a foreign port. However, although it is allowed by U.S. law, there are still foreign laws and cruise line policies to contend with. In some countries, laws prohibit cruise passengers from permanently disembarking.

Yes, you can technically "permanently disembark" from a cruise before its final port, but it is a complex process that requires prior approval and can lead to significant legal or financial consequences. This is often called a "downline join" or "early departure." Most cruise lines, such as Royal Caribbean or Carnival, require you to submit a request at least 48 to 72 hours in advance. One major hurdle is the Passenger Vessel Services Act (PVSA) in the United States, which prohibits foreign-flagged ships from transporting passengers directly between two different U.S. ports. If your early departure violates this act, the cruise line will pass a fine (often $800–$900 per person) directly to you. Additionally, you are responsible for your own immigration and customs clearance at the port where you leave, which may require a crew member to escort you to local authorities. No refunds are provided for the missed portion of the cruise, and you must ensure your travel documents (visas) allow for a permanent stay in that specific country.