If you just got off a cruise in Tampa and have a late flight, skip the airport. The Florida Aquarium is a two-minute walk from cruise terminals 2 and 3 at Port Tampa Bay, and they store your luggage free with paid admission. Just make sure you pick up your bags at least 15 minutes before closing time at 5 PM, and verify the time when you visit.
I spent the morning going through the exhibits, sharks, sea turtles, stingrays, alligators, penguins, and did the wild dolphin boat cruise out into Tampa Bay. Had lunch at the cafe on site and made my evening flight completely relaxed.
Royal Caribbean typically uses Terminal 2, Carnival uses Terminal 3, and Norwegian uses Terminal 2 as well , so this works regardless of which line you sailed.
Best solo travel decision I made on the entire trip.
Florida Aquarium Tampa // Free luggage storage with admission // Disembarkation day Tampa // What to do after a cruise in Tampa // Tampa cruise port tips