One of the first ships to have cruises opened for May 2022-April 2023 is the Carnival Panorama out of Long Beach, California. The Carnival Panorama was launched into service near the end of 2019. No other itineraries are open yet out of Long Beach, California.
Carnival has also opened a few sailings in May and June 2022 for Sydney and Brisbane, Australia. Right now the booking engine is showing some Carnival Splendor sailings from Sydney during both of these months. The Carnival Spirit is also showing sailings from Brisbane, Australia throughout May & June 2022. Carnival has not opened any itineraries for Australia past June 2022 yet.
Additional itineraries will likely be posted to the booking engine in the coming weeks and months. It is not yet clear if any Carnival ships will be switching homeports, but hopefully this information will be known soon.
This information was compiled by looking at Carnival Cruise Line's booking engine on their website. Itineraries and ship deployments are subject to change.