This is the most critical question. This eSIM is valid for Guadeloupe and Martinique (as both are part of France/EU). However, it will NOT work in Dominica or Saint Lucia, which are independent, non-EU countries. Your connection will stop the moment the ferry gets close to those islands, and you will be charged high roaming fees if your home SIM takes over. For this multi-island trip, our Caribbean Regional eSIM is the only safe option.
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Is this eSIM valid for the ferry to Dominica, Martinique, or Saint Lucia?
Updated April 22, 2026
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