Shares of the Miami company dropped 0.32% to $20.52 at last check.
Carnival canceled all voyages embarking from U.S. homeports till March 31.
Voyages on Carnival Freedom ships from Galveston, Texas, and Carnival Miracle from San Diego and San Francisco have been canceled through April 10 and Sept. 16 respectively.
Other cruises on Carnival Liberty from Port Canaveral and Carnival Sunshine from Charleston have been canceled for different periods between September and November to accommodate dry-dock work, the company said.
"We are sorry to disappoint our guests, as we can see from our booking activity that there is clearly a pent-up demand for cruising on Carnival," said Christine Duffy, president of Carnival Cruise Line, in a statement.
"We appreciate their patience and support as we continue to work on our plans to resume operations in 2021 with a gradual, phased-in approach,” added Duffy.
Booked guests and travel agents are being notified directly of the cancellations and their options for a future cruise credit and onboard credit package, or a full refund, the company said.
In December, Carnival had canceled select cruise schedules through February including all voyages embarking from Miami, Port Canaveral and Galveston, Texas.
Carnival also moved its inaugural sailing of Mardi Gras from Port Canaveral to April 24.