The Delphi class was a class of transport starships in service in the 24th century. They possessed a modular design which was drawn up by Humans and constructed by the Thelorians. They were used during the Federation-Cardassian War, and Miles O'Brien worked on several Delphi class ships during that conflict.

In 2371, a group of pilgrims from Arvanus VI abandoned their Delphi class ship Progress on Bajor's seventh moon. (DS9 novel: The Heart of the Warrior)