The service will add calls at Puerto Cabello in Venezuela and New Orleans in late September and add a fourth ship to maintain weekly service.
The new rotation is New Orleans, Houston, Altamira, Veracruz, Kingston, Cartagena, Puerto Cabello, La Guaira, Kingston and New Orleans.
The first vessel in the service calling Puerto Cabello will be the Wehr Elbe on Sept. 21, and the first vessel calling New Orleans will be the Wotan on Sept. 28.
American Shipper affiliate ComPair Data said the service operates with ships averaging about 2,500 TEU capacity.