There is one very good reason to use the Disney Transfer service after your cruise. "Disney's Convenient Onboard Airline Check-In" The service allows you to leave your checked luggage outside your cabin on the last night of the cruise and you won't see it again until you get to your home airport's baggage carousel.
Make sure your airline is on the list and that your flight is within the DCL departure time rules. You can book return only tranfers from Disney, but you have to call to do it the website will only sell you round-trip transfers.
Here's the fine print
from DCL for Miami Cruises:
Disney’s Convenient Onboard Airline Check-In
Enjoy the comfort and convenience of Onboard Airline Check-In* when you purchase ground transportation through Disney Cruise Line, such as:
- Receive your boarding passes ahead of time.
- Check your luggage for your return flight before disembarking the ship.
- Skip luggage claim at the port terminal.
- Bypass the airline check-in counter at the airport.
Here's how it works:
- Reserve ground transportation through Disney Cruise Line, then request to sign up for Onboard Airline Check-In when you check in at the cruise port.
- On the day prior to disembarkation, your airline boarding passes and valet luggage tags will be delivered to your stateroom.
- Attach the tags to your luggage and leave your bags outside your stateroom on the evening prior to disembarkation. Your luggage will be collected and delivered to your airline for you.
- Upon arrival at Miami International Airport, you can proceed to security and continue to your departure gate.
*This service is available to Guests flying out of Miami International Airport on domestic flights (including Puerto Rico and the U.S. Virgin Islands) on American Airlines, Delta Air Lines and United Airlines, as well as international flights on American Airlines and United Airlines.
Pre-registration is required and scheduled flights must be after 1:30 PM on the day your cruise ends. Airline-specific baggage fee may apply and can vary by airline. Each luggage piece can weigh no more than 50 lbs. In addition, some Guests may be selected to check in at the airport and will be unable to use this service.