There is no scheduled passenger ferry from Europe to Kingston or Port of Spain. You can cross the Atlantic one-way on a cruise if the operator accepts a booking without a return flight.

The clearest options I found are:

- Phoenix Reisen’s *Amadea* leaves Bremerhaven, Germany, on 22 October 2027 and arrives in Montego Bay, Jamaica, on 17 November, after 26 nights. From there, you could travel overland to Kingston, making the journey entirely flight-free. Fares start at €3,699 per person and include a return flight to Frankfurt. Ask Phoenix whether you can book passage only, or stay in Jamaica and leave the included flight unused. [Official itinerary and package details](https://www.phoenixreisen.com/von-bremerhaven-bis-jamaika.html).

- P&O’s *Britannia* leaves Southampton on 30 October 2026 and arrives in Bridgetown, Barbados, on 13 November, after 14 nights. Caribbean Airlines sells flights from Barbados to Port of Spain, so you could reach Trinidad with only a regional flight. Confirm that P&O will accept a cruise-only booking before booking. [P&O itinerary](https://www.pocruises.com/find-a-cruise/B626/B626), [Caribbean Airlines route](https://flights.caribbean-airlines.com/en/flights-from-bridgetown-to-port-of-spain).

For an entirely flight-free journey to Trinidad, I haven’t found a confirmed, bookable crossing that ends in Port of Spain. If a cruise calls there, you would need the operator’s explicit agreement to finish your journey at that stop. Trinidad’s regular inter-island ferry runs to Tobago; it has no connection from Europe or Barbados. [Trinidad and Tobago ferry operator](https://www.ttitferry.com/sidebar/).

Cargo-ship passage is another possibility to investigate, though I couldn’t verify a current passenger service from Europe to either destination. Old freighter itineraries may give you leads, but they don’t confirm that passage is available.

Your intended month and year would help narrow the options, since these crossings depend on individual sailings rather than a regular ferry timetable.