There is a way to get from Rio Dulce to Antigua by Shared Standard Minivan with a local operator
Pick up: Barrio La Bascula, Rio Dulce, Izabal Centro Comercial Parador del Río Río Dulce, 18021
Drop off: Antigua Center
Durarion: 5 hrs.
Trip Note: This ride is by Shared Standard Minivan for 16 PAX from Rio Dulce to Antigua.
Drop off: Antigua
Pick up: Frontera Río Dulce, Livingston Izabal, Livingston 18002
Durarion: 8 hrs.
Trip Note: This Shared Tourist Autobus from Rio Dulce to Guatemala city, upon arrival Zona 1 Guatemala city change to Shared Minivan to continue in Antigua