Not far. We used FLL instead of MIA and it usually is cheaper. The transfers come out to be $30 each way instead of $15 each way from MIA but usually we still find that it is cheaper. Bus ride from the Port of MIA to FLL Airport was about 25-30min if I remember correctly.
02/20/2011 Carnival Victory (San Juan - S Carib)
07/11/2010 Carnival Freedom (W Carib)
02/13/2010 Navigator of the Seas (W Carib)
05/14/2008 Carnival Spirit (Glacier Bay - Alaska)
11/12/2007 Carnival Freedom (US Inaugural - W Carib)
02/01/2007 Celebration (Bahamas)