NCL Air and baggage storage question

[the_scarecrow_in_oz]

We have flights arranged through NCL Air, arriving at, and departing from, Fort Lauderdale Airport (FLL) for a cruise from the port of Miami. NCL has scheduled us with United Airlines with a transfer from the Miami cruise port back to FLL after our cruise ends. Our flight home doesn't leave until 6:45 pm however. That leaves us at least 6 hours to maybe explore Fort Lauderdale. While researching luggage storage at the airport, I read that "for cruise passengers, some airlines offer baggage check-in at the port for their return flight". Has anyone ever seen or used an airline baggage check-in at the cruise port of Miami for your flight back home? If so, is United one of the airlines, and are flights leaving from FLL one of the options?

[BirdTravels]

No. Not NCL. 

[zqvol]

Unless NCL  has recently changed their processes they do not offer the service.

[RN_Prof]

You could sign-up for a tour, which will hold your bags and take you to the airport. However, in Miami I think the only tours of the Everglades.