The newest cancellation is Carnival Liberty's three-day cruise from Port Canaveral on Sept. 30.
This followed the cancellation of Norwegian Getaway's 10-day cruise, also from Port Canaveral, on Sept. 29.
The other two cancellations are Carnival Paradise from Port Tampa Bay and Carnival Elation from the Port of Jacksonville, both four-day sailings on Sept. 29. Each is currently the only cruise ship operating from the respective ports.
Passengers on Carnival's impacted sailings will receive a full refund and a 25% future cruise credit.
Current cruises will likely be extended
As earlier reported, it's likely the current five-day cruises on Carnival Paradise and Carnival Elation will be extended.
Carnival Paradise extended its Cozumel stay overnight and was to depart Wednesday. The ship will begin heading back to Tampa but remain a safe distance from the storm as Carnival determines when Paradise can land after the US Coast Guard assesses conditions.
Tampa, Canaveral, JAXPORT closed
Port Tampa Bay is closed to maritime traffic with Ian's landfall expected on Florida's central Gulf Coast Wednesday afternoon.
Port Canaveral and JAXPORT were to close at noon Wednesday. After Carnival Elation visits Freeport on Wednesday, it's likely the ship's return to Jacksonville will be delayed.