Careen Prevost, Permanent Secretary in Ministry of Tourism and Culture, said company's return was significant for the Eastern Caribbean island, particularly after in September 2017 Hurricane Maria devastated the island.
Over the past few years, Dominica's government and the Ministry of Tourism have been negotiating with Carnival to get them back to the island.
So far, there are a total of 10 scheduled calls for summer 2018.
Government has invested more than EC$6 million in site rehabilitation and reconstruction post-Hurricane Maria to get Dominica's tourist sites ready.
Carnival Cruise Lines pulled out of the island in 2010, after 21 years of making Dominica one of its call ports, citing high fuel prices.