This service is a 2.5 hours shared boat from Potosí in Nicaragua to La Unión in El Salvador, you don´t need to travel through Honduras, it is safe and the views are amazing. It is available 2 days a week.
Pickup service in San Agustín, Chinandega or León is available in a collective land shuttle.
Drop off service in San Salvador city, Zonte beach, Tunco beach or Cuco beach is available in a collective land shuttle.