Varna and Nessebar are included in three Norwegian Cruise Line programmes this year, along with ports in Greece and Turkey.
Tourists will visit Varna on April 4, May 1 and May 10, and Nessebar on April 5 and May 2 and 11.
Their programme includes visits to historical and cultural sites in both regions.
The cruise company is among the big names in the industry. The last time their ship brought tourists to Bulgaria was in 2017.