Are you talking about the Port Canaveral port? I'm going on the Mariner on Oct 10th and I booked a car through happy limousine for 2 of us(www.happylimo.com). The cost was $192.00 round trip to Port Canaveral, which includes tax, gratuity, tolls, gas and everything. They said the distance is about 30-45 minutes from the airport. I did a little searching on this site on the message board and this company was recommended a few times. Hope this was helpful!
We fly in this Friday for our cruise on Sunday and are renting a car for 2 days from Budget for only $63. We will drop it off Sunday morning and they will take us next door to the port. We'll buy bus transfer back at the end of the cruise. Last year we used The Cocoa Beach Shuttle and would recommend them. I called this year and they are $25/person.
Teresa and Larry
#36-Carnival Splendor 9/16/12
7 night Mexican Riviera
#37-Allure of the Seas 11/11/12
7 night Eastern Caribbean