The Carnival Miracle's deployment from Tampa, Florida, will begin in late January 2018. The ship is scheduled to sail year-round seven night voyages. These cruises will depart on the weekend. Based on Carnival's booking engine, it appears Sunday will be the primary day the Carnival Miracle departs from Tampa. The Carnival Miracle is a Spirit Class ship and is similar to the Carnival Spirit, Carnival Pride, and Carnival Legend. In order to get to Tampa, the Carnival Miracle will offer a 14 night Panama Canal cruise that departs from Long Beach, CA. The Carnival Miracle will be sailing from Tampa with the Carnival Paradise, which is already doing 4 & 5 night cruises from Tampa.
The Carnival Splendor's deployment from Long Beach, California, is scheduled to begin in late January 2018 too. The Carnival Splendor will join the Carnival Imagination and Carnival Inspiration. According to Carnival's press release, the Carnival Splendor will increase Carnival's capacity from Long Beach by 41%. While sailing from Long Beach, the Carnival Splendor will offer three different Mexican Riviera itineraries. Carnival's press release notes that two Carnival Journey's cruises to Hawaii are scheduled for October 13, 2018, and December 1, 2018. I do not know if there are any additional Hawaii sailings other than these, at this time. In order to get to Long Beach, the Carnival Splendor will offer a Panama Canal cruise that departs Miami on January 14, 2018. The Carnival Splendor will be the first Carnival ship to travel through the new locks on the Panama Canal, according to Carnival's press release.
For additional details about these newly announced ship deployments, check out Carnival's press release by clicking here. Carnival's press release is where I got my information from and is a good place to start if you want more information! The link will take you away from RyG's Cruise Guide by opening in a new window.